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Four (4) memory sticks boot loop

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mkmcgregor View Drop Down
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    Posted: 30 May 2022 at 10:44pm
Using the X370 Killer SLI/AC MB.
Upgraded to latest 7.03 and now 7.10 BIOS and running a 5900X.
Memory OLOy 3200Mhz CL16 2x 16GBx2 kit.

Issues common to all latest BIOS; 7.03 and most recent 7.10.

Endless boot loop when memory settings set to default 2133 and timings for more than one stick.

Once manually set to XMP settings (3200-C16), booted into windows, and shutdown with one stick adding a second stick boots fine. Would not be true for default 2133 ironically; only one stick boots.

Under BIOS 7.03, was able to shutdown windows once XMP applied, add all 4 sticks, and again would boot normally into windows or BIOS with 64GB present. Memory running in windows CPUID of 3200 C16. Full memtest86 confirmed no memory issues.

After BIOS upgrade to 7.10, memory reset so boot loop. Removed all but on stick and repeated the process above. Once XMP and cycled, two sticks boot fine. Four sticks now always boot loop. Saw a post about 1866 for four sticks, so I tried that setting. One stick, boot 1866, shutdown, add three more sticks, boot loop even at 1866.

It seems 7.10 is a bit of a downgrade for memory compatibility.
Curious why 2 or four sticks still won't boot at 2133; only one will boot.
Curious why 4 sticks no longer work although I kind of consider it serendipity that I was able to figure out a way of making it work by a specific installation pattern previously.

It's a shame that it seems that it can support it but now does not.

Any suggestions or information would be greatly appreciated.
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mkmcgregor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mkmcgregor Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2022 at 11:34pm
As an F.Y.I.

I cannot downgrade to 7.00 or 7.03. I thought maybe backup to restore previous functionality. Once 7.10 is loaded, these older files become "Invalid Files" though they do show in the Instant Flash files available. They do say cannot downgrade and they meant it.

I reinstalled 7.10 one more time since I could.
Also reset CMOS via the jumper.

No dice. Still two is the limit and 2133 always fails with more than one stick of this memory.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mkmcgregor Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jun 2022 at 8:43pm
Went a little further and tested a different G.Skill Ripjaws V 3200 CL14 4x8GB kit; actually 2 kits of 2x8GB. Same results as before. 4 slots filled does not work. 2133 default memory only boots with one slot filled. Set XMP and then 2 slots work.

My only conclusions are:
1) Latest 7.10 BIOS has some issues with X370 and 5000 series. This is based on the ability to get 4 sticks to boot and run with some shenanigans. The fact that it cannot boot with multiple (2+) sticks at 2133 seems a huge issue.
2) It's possible that my specific MB or CPU is contributing to some problems; slot, trace, or manufacturing issue. I doubt that since it was working in some respects and testing prior to the 7.10 update with 4 slots filled; memtest86 passed. 2133 is still a big sticking point for only 2 slots to fail on any combination of two slots. That should work regardless. Endless boot loop implies some issue.

We are unlikely to get further support. I hope we do. I appreciate that they delivered new BIOS updates and the chance to test this. I was hoping to salvage an old system and prevent some e-waste. I don't even feel comfortable selling the system as is since the new owner could easily and accidentally make unbootable.

I may try one more test with a more basic 2400 RAM. If that will not boot at 2133, BIOS beware.

Cheers all!
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