X99-A/USB 3.1 motherboard - does it support 32 GB DDR4 DIMMS?

Hey Techsupport,

I have an x99-a/usb 3.1 workstation from a while ago which I’m trying to repurpose into a more useful machine by upgrading the ram (I have 48 GB of ram currently on 6x8 GB sticks). I recently read that the BIOS has been updated to allow for 128 GB of ram to be used. However, I have a broken memory channel which has caused one of the slots to stop working. I was thinking of possibly buying this kit: Corsair Vengeance LPX Black 128GB 3600MHz DDR4 Quad Memory Kit LN110288 - CMK128GX4M4D3600C18 | SCAN UK but I’m unsure if the 32 GB sticks will be compatible in the machine. Does anyone know if they will work and if I could plug in 4 of them to use full 128 GB of ram?

Extra info: I’m running a 5820k, windows 10, two 2080Tis with plenty of psu power.

Thanks!

Unfortunately 99 % no.

Source: Me.

Why the 1 % uncertainty?

My old home server used an ASRock X99 WS motherboard with a Haswell-EP and later Broadwell-EP Xeon, so cannot say anything definitive about your specific CPU model.

32 GB ECC UDIMMs didn’t work with the last/newest BIOS for that motherboard, 16 GB ECC UDIMMs worked just fine. On the other hand successfully tested 32 GB ECC RDIMMs and 64 GB Load-Reduced ECC DIMMs, but these are blocked by Intel on non-Xeon variants of socket 2011-3 CPUs.

32 GB UDIMMs weren’t around in the early days of DDR4 (socket 2011-3 was the very first DDR4 platform), that’s probably why there’s no luck there.

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I have a Supermicro X10SRA MB and with my 5930K it supports only 8GB UDIMMs. So I have upgraded to a Xeon E5-2680 V4 and now I have 4x32GB RDIMMs.

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