DIMM_B1 and DIMM_B2 Slots - My Computer Won't POST. System firmware: memory sensor (Mem ECC warning) transition to critical from less severe, DIMM_B2; System firmware: memory sensor (Mem ECC warning) transition to non-critical from OK, DIMM_B2; Msg: IPMI. A and B are each a set of channels, so the two-channel. I've tried to re run memtest on dimm A1 and B1 it wouldn't…The 2 RAM slots on the right B1 and B2 are working fine and I have 2 sticks of RAM plugged into them. with both 16 GB memory modules installed (2x16GB - 32 GB total) set to. I had read reports that G. This allows the new BIOS enhancements to run, potentially. • 2 yr. Open the downloaded user manual and search for [Recommended memory configuration] as below picture. But when both ram sticks are seated in 3 and 4 the pc boots and works just fine. Login to Download center and input the Motherboard model name in the search bar. Mainboard: Asus Tuf gaming B550-Plus (Wi-fi) Cpu: Amd Ryzen 5 3600 Ram: Trident Z RGB 3200MHz 2x 8Gb GPU: Asus Gtx 980. its only dimm 3 and 4 which are not working anymore. System memory 1. Already tried the following steps: Both RAM sticks seperatly in slots A1 & A2 - working Recommended setting A2 & B2 - not working Single RAM in B1 or B2 - not working. com. • Visit the ASUS website for the latest QVL. SolutionThese commands are useful when troubleshooting errors from CLI. Major . if the new cooler on to tight it can crush the lid into the cpu chip and cause errors. DIMM (dual in-line memory module): A DIMM (dual in-line memory module) is a double SIMM (single in-line memory module). To enable dual-channel mode, install the memory modules in pairs into the same-colored slots. If you actually read the manual for the Maximus XI series boards, it clearly states, that when using 2 memory modules they should be installed in DIMM A2 and B2 (for dual channel). ASUS TUF Gaming X570-plus won't post with RAM in both A2 and B2 slots. 0. It appears that the only viable setup is by using either 1 or both RAM sticks in the DIMM slots. 1=DIMM_A1. 137. 20 Nov 2020. 02/day) Jan 3, 2023. Press the buckle of the memory slot, refer to below picture. Keine Garantie oder Gewährleistung. When using one DIMM, install it into slot A2 for better memory compatibility and performance. I have this Dell PowerEdge R420 and when I use the H310 flashed to it mode in it, the fans will be running at 30% (6000 - 9000rpm). Then reboot the system and verify operation. Out of the box i wasnt able to get into Post at all with any ram configuration and the yellow RAM light would be lit. I'm planning on using the Rog Maximus IX Code motherboard and 32GB (2x 16GB modules) of RAM. DDR3 Laptop SO-DIMM to Desktop DIMM Memory RAM Connector 5V2 DDR3 Adapter a N1Y4. Free shipping. Thanks DELL-Shine K. I recently installed a new CPU cooler (Noctua NH-D9L). Hello there fellow hardware nerds! My ram has 4 dimm slots, it's dual channel and it's colour coded. By having them in the correct corresponding slots, allows them to work together in dual channel mode. $229. Last Published Date. UEFI0339: The Dual Inline Memory Module (DIMM) in the memory slot <XX> is disabled because of initialization errors caused by uncorrectable memory errors, invalid. I'm doing memtest on all dimm slots individually,I've already done it on A2 and B2 dimms. Why I'm asking: my CPU cooler (Thermalright Peerless Assassin 120 SE) is huge and the plastic sides of the literally-strapped-on fan is occluded by both sticks of RAM, but if I shift them over it will all fit nicely, lol. Peter Wertz. Replace DIMM_C1. Vendor: Cisco Systems, Inc. Next, install the 3 rd RAM module into slot DIMM_D1 Finally, install the 4 th RAM module into slot DIMM_C1 With all 4 RAM modules in place, you have a total of 4x8GB = 32GB of installed memory. 1. I have already purchased a memory kit that is definitely on the list of. B1. Here's a link to the manual. As long as the amount of memory in Channel 1 equals the amount in channel 2, dual-channel mode. b. 2. Generally speaking any two DIMM slots will function, but since most motherboards nowadays use daisy chain design for memory slots and dual channel, the best performance is probably going to be in slots 2 and 4, aka A2 and B2. DIMM_A2, DIMM_B2 + DIMM_A1 and DIMM_A2, DIMM_B2 + DIMM_B1. If you have four RAM sticks, all four available slots on the motherboard can be used for insertion. Maybe it's a motherboard issue, or even a memory controller problem on the. try losing the cooler see if anything changes. Removing one of the video cards nets the same result. Uncorrectable memory errors may also be reported on the affected slot/DIMM. After that server gives memory and processor errors randomly. A motherboard must manage all the ram using the same specs of voltage, cas and speed. And when setting the memory profile to 3600MHz, only the A2 slot would remain functional. Can’t figure out which DIMM slots to use. You don't want extra length for you signal routes, as they act as tiny antennas. Refer to Table 1 on page 4 for DIMM speeds. 00) During the setup, this is what I've done. Dell Support Resources. Replace DIMM_A2. This way you can reseat the DIMM and test the slot with another stick that isn't having issues. #1. For Dual-Channel Mode, Channel 1 MUST equal Channel 2. like if you had a bunch of harddrives. I rebooted and reset the memory speed and. If you have two CPU's in the system then I would recommend that you swap DIMM A2 with DIMM B2. 8521 . B1. Major [email protected] process outlined in the post you mentioned was to identify the Dimm with the issue, since you know the issue involves Dimm B1, the process won't be nessacary. As written above, I can't get ram slot A1 and A2 to work in a new build I helped my friend build. 2) Increase DRAM Voltage in BIOS to no more than 1. So I have spent the last two days trying to figure out why my new upgrades would not post when XMP or XMP2 profile was loaded. It could be an issue with the RAM itself, although less likely. The software reports the populated DIMM slots are the furthest two to the right, DIMM_A1 and DIMM_A2. What I would recommend is to schedule a maintenance time to down the server, then swap the dimm in B1 with another MATCHING dimm, from within the server. DIMM errors are usually caused by a faulty DIMM, or sometimes by a bad Motherboard; Notes. Ram slots A1 and A2 not working, they worked before but then I took the PC apart and now they don't work anymore. Post Package Repair (PPR) - The second "self-healing' memory enhancement, results in repairing a failing memory location on a DIMM by disabling the location/address at the hardware layer. B1/B2 share the same channel. 1- turn off PC disconnect power and pres on/of buton. I have purchased 8gb x 3 same memory sticks but I am able to use the sticks only on DIMM slots A1 and A2 - when I insert the memory in slot B1 or B2 the CPU doesnt boot; it tries to boot but fails and repeats the process. Restart the server 1 more time to confirm issue resolved and no dimm errors. then i put only one in a dimm and checked every dimm socket with only one modul. Add to Cart . and 4. B1 and B2 c. 16gb (2x8gb) 3600mhz cl16 RAM dual channel kit. DIMM_B2 DIMM_A2 DIMM_B2 DIMM_A1 DIMM_A2 1 1 2 2 A B Step 4 A B D C E 1 2 2 1 1 3 2 1 2. So, I was very surprised to learn. I suspect that if the slots on my motherboard were bad then all three sets would have had similar results than being so dis-similar. The result is that I only have single channel enabled. PC2-4200 RDIMM. 1. Replace DIMM_B1. * 如果是3支記憶體，不管怎麼插一定是通道A. 1. Login to Download center and input the Motherboard model name in the search bar. Привет Друзья : я оформил уже второй кредит на дебетовую карту в этом банке (Открытие) и вам советую. Re: WLC 5520 Standby system status amber light blinking. ago. and only a1 and a2 are working. 1,510. Reseat memory. MHz for 3 rd Generation Core Processors) DIMM Up To 32GB Three Independent Display (with 3 rd Generation Core Processor): VGA x 1 , HDMI x 3 10/100/1000Base-T x 2 SATA 6. It probably doesn't make any significant difference but I've always used slots 2 and 4. DDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2 (64bit, 288-pin module) DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2 (64bit, 288-pin module) DIGI+ EPU AIO_PUMP CPU_FAN CHA_FAN1 CHA_FAN2. Legacy memory troubleshooting steps incorporate moving failing DIMMs to a different slot to confirm whether or not the errors follow the DIMM or remain with the DIMM slot. Major. g. 184,590. 2% lower than the peak scores attained by the group leaders. A2, A3 - marked blue) with another bank (B1, B2, B3 - marked red) tests the whole bank of DIMMs in a new bank, on a new memory controller. 2, USB 3. RELATED: Which Slot To Put RAM In – A Guide To Optimal RAM Placement. iDRAC Tools installer is same for set of OS for a set of platform. 5V) FB-DIMM support, and PCI-Express Gen. A DDR4 module is notched differently from a DDR, DDR2, or DDR3 module. II slot capability, these Supermicro server boards are ingeniously designed in various optimized models. Ram in either of B slots wont boot. Same issue here: Asus X370-PRIME PRO, bios 5220, Ryzen 5 3600. Also, regarding A1/B1 A2/B2 slots, the slots farthest away from the CPU socket usually works better, as they terminate the memory channel. If I put one RAM module in either of these first two slots and turn on the PC get I no output to the screen and the orange/yellow light appears next to DIMM on the motherboard indicating a. 0. . Bought it on eBay for $95. . PowerFlex Software, Ready Node Series. My details: AMD Ryzen 5 3600 @ 4398. I swear I'm getting that "satisfying click" when installing but even that has been. Major. , DIMM (dual inline memory module) • This is what you plug into your motherboard • If we have chips with 8-bit interface, to read 8 bytes in a single access, use 8 chips in a DIMM. Replace DIMM_B1. x or later, the first recommended step is to restart (without moving DIMMs to a different slot). • Refer to for the latest Memory QVL (Qualified Vendors List) Recommended memory configurations DIMM_B1 DIMM_B2* DIMM_B2* DIMM_A1 DIMM_A2* DIMM_A2* DIMM_A2* ASUS TUF B365M-PLUS GAMING. . When I remove the dimm that is in C1 (On the far right) the dimm in D1 registers, meaning that both the ram slot D1 and ram dimm are functional. 2. I have evaluated various configurations of using the RAM and the DIMMS. One stick in A2 will boot me into Post and one stick in A1 and A2 will boot me into Post. I have, RYZEN 2700x. Use the same size and speed modules. My company use a Dell Poweredge 730 rack server. Normally they are around 10% ~3000rpm or less. The front panel was a snap to remove and install as well. Add to Cart . The DP4400 may report a missing or faulty DIMM (Dual Inline Memory Module) during boot. Rev 1. Major . At the moment i am in single channel with the ram in the DIMM_B1 and DIMM_B2. 2ssd 970 evo 500gb MSI RTX 2060 super 6gb GPU ( i have moree ssds and hdds to go with but added later ) also im running the Wrath cooler from AMD atm for. Also, easy search found official manual about managing this server hardware. com. 请问在log中能看到 Memory 容量和频率. 1. 假如我没有猜错的话，应该是16G*8条内存，因为识别不了A8的16G，所以还剩余112G。. 所以，如果是两根内存，推荐插A2和B2组成双通道。. DIMM_D2 4GB Installed80Operational . Major. Correctable shouldn't be too concerning. 774 Description: DIMM DIMM_B2 on server 24 operaState: disabled `show server memory detail` (locate impacted DIMM PID)- Example:. . • Before using the ASUS CrashFree BIOS 3 utility, rename the . Support Intel ® Core™ 14th/ 13th/ 12th Gen Processors, Intel ® Pentium ® Gold and Celeron ® Processors for LGA 1700 socket. 64GB 14+2 14+2 8+2 Form factor ATX ATX Mini-DTX Graphics output Thunderbolt support Wireless. Specifies the total width, in bits, of the memory, including any check or error-correction bits. Major. DIMM_C2 failed self test (BIST). 2_1 slot of an ASUS Z490-A Strix Gaming motherboard. #6. dimm. PC3-12800 SODIMM. The ram works independently from that. I Swapped the CEO's Assistant For a Day! so i have a Asus rog strix B550-F motorboard AMD ryzen 7 5800X 3200mhz ddr4 g. 1. e. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module, with only one rank accessible at a time. 3. The manual I'm looking at lists the DIMM socket labeling as DIMM_A1 (black, closest to CPU), DIMM_A2 (gold), DIMM_B1 (black), DIMM_B2 (gold, farthest from the CPU). 0. The DP4400 may report a missing or faulty DIMM (Dual Inline Memory Module) during boot. When ram is seated in slot 2 it won't boot at all. The motherboard is MSI B250M Pro VDH. #4. Product. Thanks so much for your help!DIMM A2 = Kingston / HyperX Fury 8GB 2666MHz CL16-18-18-39 (SK Hynix) DIMM B2 = G. DIMM B2 Chan A Chan B Chan C CPU Socket 1 DIMM F1 DIMM F2 DIMM D2 DIMM D1 DIMM E2 DIMM E1 Chan F Chan E Chan D CPU Socket 2 5 Remove the Heatsink(s) The heatsink is attached to the server board / processor socket with captive fasteners. Basically 1*3 or 2*4. Any combo of A1/B2, A2/B2, or A2/B1 probably won't post. Memory modules in slot DIMM A2 and DIMM B2 . Most of the time, an ATX form factor motherboard is equipped with 4 sets of DIMM memory slots, and the micro-ATX or mini-ITX form factors are mostly equipped with 2 sets of DIMM slots. BIOS Information. If yes, insert in this order: DIMM_A2, DIMM_B2, DIMM_A1, DIMM_B1 If they all boot alone, but not together then it's either a mismatched timing issue or there's a problem with one of the slots. This is the output of show commands got from the CIMC port. DIMM_B2 4GB Installed80Operational . The mainstream choice is using 2 sticks of 8GB, a total of 16G memory. DIMM_C1 4GB Installed80Operational . 35 V. ipmctl show -dimm command displays the PMem modules discovered in the system and verifies that software can communicate with them. Click OK when done. B2 and A1 e. 2 slots, DDR5, USB 3. 2_1(SOCKET3) RGB_HEADER2 COM_DEBUG AURA. Supports Intel ® Core™ 14th/ 13th /12th processors. DIMM_E1 4GB Installed80Operational . I have that mobo and have done so there. It boots but shows only 2 GB while it should show 4 GB. I would understand if there an issue with DIMM_A2 since when I secure a ram stick in there it locks with a terrible/damaged noise. In Manual & Document page, select the manual in local language , and then click [DOWNLOAD] 3. 8526. 1 Rank x4 Planar with or without Address and Command Parity. 128GB 4 x DIMM, Max. 3 Installing Memory Modules (DIMM) 21 2. Refer to your Server Board Technical Product Specification on the Intel® Server Deployment Toolkit CD for additional information. System barfs and the beeper goes long-short-short for bad RAM if either stick is in slot A2. According to manual led indicator means there's an problem with DRAM. - Keep the button on the back panel pressed during at least 20s. Major. Next Generation Storage：4*PCIe 4. 41. . Critical Mem ECC Warning: Memory Sensor, transition to. I don't think there are any bent pins in the cpu slot. This method is used to find damaged ramslots. I'm seeing the following message in my syslog: Server_Administrator: 6545 1404 - Instrumentation Service Memory device status is critical #012Memory device location: DIMM_B3 #012Possib. Both stick work together in A1+A2 but run in single channel mode. but if i put dimm moduls in b1 and b2 its not starting. To determine TotalWidth, run the following: path/to/dmidecode -t memory | grep "Total Width:" # Example Output Total Width: 72 bits Total Width: Unknown Total Width: 72. To setup the CIMC interface follow the given steps: Step 1 Connect the CIMC cable to the 10/100/1000 port in base T. A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched differently to prevent installation on a DDR2 DIMM socket. But when I rebooted to install the OS again, the same thing. In. DIMM_C1 failed self test (BIST). 8524 . A dual in-line memory module (DIMM) is defined as a 64-bit memory unit containing multiple RAM chips on a circuit board with pins that connect to the computer’s motherboard. 128GB ATX 7 1 1*ARGB, 2*RGB V V Realtek® S1200A V Realtek RTL8111H 1GbNumber of DRAM: item 1: item 2: itme 3: itme 4: one: Install as recommend: install in other slot : two: Install as recommend: exchange each slot: install singe DRAM in recommend slotPRO Z690-A WIFI. With BIOS 2. • For Quad Ranks DIMMs, when installing less than or equal to. This motherboard has 4 slots: DIMM_A1, DIMM_A2, DIMM_B1, DIMM_B2 (in that order from left to right). Most servers will tell you exactly which stick of RAM is having the. . Was: $8. It probably doesn't make any significant difference but I've always used slots 2 and 4. 8525 . Usually seeing this means one of your memory modules is going bad. 2) Extract the file and you will get a text file and the BIOS file. I've just tried every combination I could, but could not get past 52 GB total, with BIOS warning of different geometry. Open the downloaded user manual and search for. . $11. The memory sockets have direct connections to the CPU. If you put two sticks in A1/A2 or B1/B2, they. The direct cause could be a few things, but replacing the dimm is the path of least resistance. DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2. Skill 2x2GB PC2-1066 RAM, and the QVL that came with the mobo manual didn't have it. BIOS file in the removable device into . dell R730服务器报MEM0001错误. Uncorrectable memory errors may also be reported on the affected slot/DIMM. While trying to solve the problem, I updated to the latest bios 0703 (issues present since at least 0502), ME firmware, did CPU and RAM re-install countless times. This puts 8GB on each channel and the single DIMM on the farthest slot from the CPU. In the manual Said: there are these slots: Dimm a1 Dimm a2 Dimm b1 Dimm b2 and said that for Two kit stick the best setup is to fill DIMM A2 DIMM B2 (the second and fourth slot contingente from left to right). 6. Product Model: Form Factor: Chipset: Memory: HDDDDR4 DIMM_B1 (64bit, 288-pin module) DDR4 DIMM_B2* (64bit, 288-pin module) DDR4 DIMM_A1 (64bit, 288-pin module) DDR4 DIMM_A2* (64bit, 288-pin module) DIGI+ VRM AIO_PUMP CHA_FAN3 CHA_FAN2 LED1_CON CHA_FAN1 CPU_FAN CPU_OPT BOOT VGA CPU DRAM M. It even booted from the m. 8521 . • For CPU1 configuraton, install DIMMs from the orange slots and in the order as follows: DIMM_A2 -> DIMM_C2 -> DIMM_B2 -> DIMM_D2. 4=DIMM_B2. To achieve dual-channel pairing, it is necessary to have either two or four identical RAM sticks. Great board, and the memory support is a lot better given its 2 DIMM. asus manual says that 1st i have fill A1+B1 then i should fill A2+B2 . Memory Arrangements on PC IBM PC original architecture Classic server (most common) architectureAfter a few minutes of reading the manual and troubleshooting I was able to get it to boot by removing the RAM from B1 & B2 slots and only using the other 2 or just one of them. 0b DP 1. I have a Dell R710 that's refurbished (so no warranty or support by Dell) and currently has 48 GB of RAM in it (12x4GB). Once I put ram in either DIMM_B1 or DIMM_B2 it wont. Major . From left to right, my DIMM slots are labeled: DIMM_B1 , DIMM_B2 , DIMM_A1, DIMM_A2. Page 20: Chapter 2: Bios Information And then, find the memory slot. Adding memory is one of the most cost-effective ways to improve your computer's performance. 5. Check with the vendor to get the correct memory modules. Match the notch of the memory with the notch of the socket, and push the memory vertically downward into the socket. These two "faulty" slots do work with the 1600 perfecty fine in dual channel in all slots, even at 3400 Mhz. . DIMM is used in desktop machines, laptops, printers, servers, and high-end workstations. Replace DIMM_B2. a2 b2 first then a1 b1 if 4 modules are used. 7. DDR3 Training Failure - FPT - Write Leveling DIMM B2 Memory Training Failure detected. To allow the host to map out any DIMMs that encounter uncorrectable ECC errors. Click the slider to display the following screen, then select the SLI multi-GPU item. Okay thanks, thats better for cpu cooler ram clearance then. DIMM_E1 DIMM_E2 DIMM_D1 DIMM_D2 DIMM_B1 DIMM_B2 DIMM_A1 DIMM_A2 8 Make Server Board Power Connections CAUTION: Note the location of the latch on each power cable connector and align it with the matching tab on each server board socket. Note any messages and continue testing. Then after a few times trying to remove and switch slots, It worked again. Till now I have done the below steps. PC2-4200 RDIMM. Some tools may report that as "dual channel" with DDR5 because there's 2 channels per bank, but those tools would report "quad channel" if you were using both A & B banks (DDR4 was 1 64 bit channel per DIMM, DDR5 is 2 32 bit. - Plug the power cord and power on. 4. Product. So all the sticks work individually in every slot at the standard/default settings (2133 MHz). Everyday Low Price! Buy. Recommended memory configurations DIMM_A1 DIMM_A2 DIMM_A2 DIMM_A2 DIMM_B1 DIMM_B2 DIMM_B2 ROG STRIX B760-F GAMING WIFI. You are using the wrong slots. 1. Jul 5, 2018. Page 18 Installing a DIMM To remove a DIMM 1‑10 Chapter 1: Product introduction. 2-7 M S-7502 M ainboard. Also if I insert the original 2GB module in slot B2, I have no problem at all. 2. I want to note that on the tuf gaming x570-plus. Does not complete POST, as far as I can tell. 1 Answer Sorted by: 4 Except the RAM that I have is dual rank with a frequency of 2400Mhz which seems to mean I am stuck installing into slots A2 and B2 with no possibility of adding more RAM of. The reason for this is that A2 is likely the. I want to install a matched set of 2x48GB DDR5 RAM sticks (Corsair or Gskill) for 96GB total DDR5 RAM on a new build Asus Maximus Hero Z790 MB with an Intel-i9 13900K CPU. Customer Rating:For only 2 sticks of RAM ASUS recommends using slots A2 and B2. DIMM A2 DDR-3 8. DIMM_C2 4GB Installed80Operational . B. Channel A = socket DIMM A1 and DIMM A2 (Yellow-Blk) Channel B = socket DIMM B1 and DIMM B2 (Yellow-Blk) Therefore the manual reads like you should use A1 and A2 (Channel A) as I mentioned above, but after reading this I checked CPU-Z and it says I'm in single channel mode, so I'll be switching to A1 B1 (Yellow Yellow)I am using the MSI B450 Tomahawk MAX motherboard together with the Ripjaws V DDR4-3200MHz CL16-18-18-38 1. If I put a single stick in DIMM B1 or DIMM B2 the EZ debug resolves and I can post and get into bios. - If both A2 and B2 DIMM slots are populated the default memory profile works fine (2133Mhz); if I enable XMP or XMP2. So my B2 ram slot fix worked for a while, but now the computer is no good. Login to Download center and input the Motherboard model name in the search bar. Page 18 Installing a DIMM To remove a DIMM 1‑10 Chapter 1: Product introduction. 可以先上1条内存，看看能不能识别，再取下来上另外两条，确认插槽和内存都是好的. Just pick a pair, or two. I have a i9 10850k non OCd on my Asus Z590 TUF Gaming Plus, I have the ram installed DIMM_A1 = 16gb, DIMM_A2 = 8gb, DIMM_B1 = 16gb, DIMM_B2 = 8gb. 7- connect 8 pin PSU cable to mobo. ExpertBook B2 Flip is designed to accelerate through every business task, in the office or on the go — and with a display that rotates through a full 360 ° for productivity at any angle. • Refer to for the latest Memory QVL (Qualified Vendors List) Recommended memory configurations DIMM_B1 DIMM_B2* DIMM_B2* DIMM_A1 DIMM_A2* DIMM_A2* DIMM_A2* ASUS TUF B365M-PLUS GAMING. this is the whole concept of the naming convention and often times the color coding some MB have is to make it easy to make it dual channel. RAM sticks placed in slots B1 and B2 do not post to the bios (but still get RGB) but A1 and A2 does appear in bios. A faulty DIMM is a considered a nonfunctional device. After a few minutes of reading the manual and troubleshooting I was able to get it to boot by removing the RAM from B1 & B2 slots and only using the other 2 or just one of them. But—and I. Rev 1. If it returns however, I'd ensure your systemrom/BIOS/microcode is current, both the newer Dells and HPEs have some advanced memory interactions. We are getting this error "E2111 SBE Log Disable Crd A DIMM 2 " on Dell Poweredge R900, if we shutdown the server then turn on again, the error is gone BUT came back. The Cisco UCS B200 M3 is an Intel-based, half-width blade supporting two CPU sockets using Intel E5-2600 series CPUs and up to 24 DIMMs; it supports one modular LOM (dedicated slot for Cisco's Virtual Interface Card) and one mezzanine adapter. Cancel Post. 2 2280 installed in the M. NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, B1, B2, B3, and B4 and 8 GB DIMMs must be installed in slots A5, A6, A7, and A8. (You could mess up and use something as A1/A2 above, loosing dual channel completely, but I see no good reason why A1/B1 and A2/B2 would not offer this. 2. then i put only one in a dimm and checked every dimm socket with only one modul. No system post and DRAM QLED is lit. The main thing I’m confused about is which slots to put my ram in. So, ram in the A's work and boot fine, but if in. I found that both sticks work by themselves in A1 and A2 dimms, but neither of them work in B1 or B2 dimms. if i put dimm in socket a1 and a2 the system is starting. the MSI MAG B560 TORPEDO motherboard, memory slots are A1, A2, B1, B2 from left to right. When you have two identical memory modules using alternate DIMM slots (A2 and B2) on the motherboard, the system is likely running a dual-channel setup. Note: Make sure that the system power cord is removed before installing or removing DRAM.