X10QBI and v3/v4 cpus (e.g. supermicro sys-4048b-trft)

angel_bee

Member
Jul 24, 2020
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I have been through the posts multiple times but still can't figure out on the exact Lockstep settings to double (or significantly improve) the memory speed. I am running four Intel Xeon E7-8891 v3 procs. I have populated all blue slots in all 8 MemCards (Rev 1.01) with Samsung (32x8GB) [M393B1K70DH0-CK0] PC3-12800R modules. Could somebody be so kind and explain in detail on how to go about it?
hi, your physical slot configuration seems correct.

lockstep (a.k.a 1:1 mode) will HALVE your memory speed, not double it. what you want is independent (a.k.a. 2:1) mode. the option to do this should be located under your chipset settings > memory configuration > VMSE lockstep mode
 

angel_bee

Member
Jul 24, 2020
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I ran Passmark performance test, improvement was negligible. Shouldn't CPUz also show a higher frequency under the Memory tab? How do I verify the memory speed? What are you using? Thanks
im not sure.... most likely it doesn't show because you're not changing the frequency of each DIMM - you're just changing the number of channels the memory controller on each daughterboard uses to communicate with the CPU. if you are in 2:1 mode and you are confident the BIOS settings are being saved, then literally that's that.

at the amount of memory bandwidth you are having with all 8 channels populated for every CPU, it's not at all surprising to see little or not effect on performance. unless it's super super niche, applications don't make use of the full bandwidth.

for me personally, i found Geekbench (4 or 5, doesnt really matter) really picks apart the performance and really reflects the RAM bandwidth on one of its test metrics. so if anything i would use that. you will see almost perfect doubling of the memory benchmark compared to lockstep mode when you use geekbench. and not to sound like a grandma, but really, even if your geekbench memory score isn't 1st in the world, it really doesn't matter in terms of how fast it really is in real life applications - synthetic benchmarks are called synthetic for a reason. if you just care about practical application, don't get too hung-up on those scores.
 

SnowDigger

New Member
Dec 19, 2020
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im not sure.... most likely it doesn't show because ...
Thanks so much for all your input! OK, I will try Geekbench and if I don't see a reasonable improvement I will clear my CMOS and set up the BIOS again just to make sure. I will post my result. What an adventure :)
 
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haydin

New Member
Sep 17, 2021
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Hi all,

I need a favor from one of u guys :)

I got an X10qbi from ebay but during transportation some capacitors at the back of the motherboard fall off:(, i found most of them in the box but some still missing.

Contacted with supermicro and they are not willing to help, they say they will not share that information with me, which is weird.

Anyway i need to know which caps go to which pad, i checked it already under a microscope and fit the ones to the pads i think they fall from by looking to the profile of the broken solders but need to be sure if i am correct.

so is there anyone who has this mobo on hand and can take a photo of the back right corner? (the place which you can see in the attached images), if anyone can help i will be really really glad, i dont want to power it up without these caps soldered(or soldered in wrong places, because they have 2 different color codes, yellow and brown) thanks in advance.
 

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