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  Topic Review (Newest First)
02-03-2020 10:49 PM
pewpewlazer I recently picked up an E5 1680 v3 Xeon (8c/16t 3.2ghz HWE) off eBay to play around with, and it has been nothing but a load of problems I can't wrap my head around.

Yesterday I rebuilt my water loop in a new case, swapped all my hardware over, and dropped in my new juicy J batch super-duper-xeon-edition of a 5960x. Right away, no POST. Everything came on, monitors woke up like something happened, then immediately gave the "no signal, entering standby" message. Tried power cycling, rebooting, nothing. Clear CMOS, nothing. Switch to the "backup BIOS" on my board, nothing. Try 1 stick of ram, nothing. Try a different kit of ram (some ddr2400 stuff), nothing.

Put my 5820k back in, boots right up.

Tonight I decided to give the Xeon another go before writing a disgruntled message to my friendly neighborhood eBay seller. Much to my shock and awe, after power cycling it once I had a POST screen!!! It seemed to have kept my 5820k voltage settings, so I left those alone, set the multipliers to auto, and made sure it could get into Windows. After I confirmed that worked, I went back and set 35x/35x CPU/cache multis, 1.25vcore, 1.2vcache, 1.9vccin as a starting point. Booted back into Windows, fired up Cinebench R20, and got to testing. 3.5ghz pass, 4ghz pass, 4.3ghz pass, 4.4ghz pass, 4.5ghz error. I figured 4.3ghz should be good, so I went to go set 43x in the BIOS and continue on stability testing at 4.3ghz. When trying to reboot, Windows slapped me in the face with a DRIVER_OVERRAN_STACK_BUFFER blue screen, but it was still able to reboot into BIOS.

Once in the BIOS, I set 43x CPU multiplier, hit save and exit, and that's all she wrote. I'm back where I was last night. It just will not POST. Tried power cycling, rebooting, clearing CMOS, nothing works, It's like the chip is dead.

My motherboard is an ASROCK X99 Extreme 4/3.1, which has always been very good about the whole "load default settings if the overclock you save doesn't POST" thing. I've never had to clear CMOS when overclocking my 5820k. Worst case it would POST after a reboot or power cycle and be back to default settings. So I have NO IDEA what is going on with this new CPU. Can it not run at 'default settings'? Can there be something wrong with the chip itself? Has anyone run into anything similar to this? I'm truly stumped by this one. Last night I was thinking it was just a dead CPU, but now I don't know what to think.
01-22-2020 02:18 PM
Desolutional
Quote: Originally Posted by coccosoids View Post
Who could afford to help me tweak a 5960x overclock on Taichi X99?
It's been 3-4 years since and I've almost forgotten everything.
Set VCCIN to 1.95V with no LLC, and set Vcore to manual 1.20V, then change CPU core multiplier until your PC hardlocks, you can go up to 1.30V as long as your cooling is sufficient (keep CPU cores below 70°C). Once you find the point where your system is unstable, decrease CPU core multiplier by one and stress test again - keep Vcore the same until you find a stable multiplier. Now you can fine tune Vcore until the system is unstable, reduce Vcore by 0.03V each run until the system is unstable, then set Vcore to the last run.

Use ASUS Realbench or HWBOT x265 to test stability quickly.

http://dlcdnmkt.asus.com/rog/RealBench_v2.56.zip
http://hw-museum.cz/data/hwbot/HWBOT...u-z_1.89.1.zip
01-22-2020 12:38 AM
coccosoids Who could afford to help me tweak a 5960x overclock on Taichi X99?
It's been 3-4 years since and I've almost forgotten everything.
01-14-2020 11:04 AM
HeadlessKnight
Quote: Originally Posted by 8051 View Post
Pretty impressive. I wonder how much of your SLI performance is down to having two full x16 PCIe lanes instead of x8?

I have the cheaper grade of Corsair Vengeance than you (CMK16GX4M4A2666C). I could never get it to DDR4-3000 w/my 5820k, but on my 9700k I can get it to DDR-3200 w/tighter primary timings than yours.

I'm also impressed at the low vcore required for your 4.5 Ghz. 5960k.
Yep. Coffee Lake has much better IMC than Haswell-E, but keep in mind X99 supports Quad-channel and Z390 Dual-Channel which makes tweaking RAM more challenging on X99. As for X16 vs X8 sadly with my mobo I cannot force PCI-E 3.0 to X8 to bench. But I tried PCI-E 2.0 X16 which is equal to 3.0 X8 and the difference is negligible in real world usage. In benchs you might lose up to ~5 fps in high fps scenarios and 1-3 fps in low fps scenarios .
01-14-2020 12:03 AM
8051
Quote: Originally Posted by HeadlessKnight View Post
5960X @ 4.5GHz+DDR4-3200 OC performance scaling with SLI RTX 2080 Ti. Going from bone stock 3.3GHz to 4.5GHz/4.1GHz cache/DDR4-3200, net about 40% performance increase in Far Cry 5 benchmark.
Performance is pretty close to stock 9900k.
Pretty impressive. I wonder how much of your SLI performance is down to having two full x16 PCIe lanes instead of x8?

I have the cheaper grade of Corsair Vengeance than you (CMK16GX4M4A2666C). I could never get it to DDR4-3000 w/my 5820k, but on my 9700k I can get it to DDR-3200 w/tighter primary timings than yours.

I'm also impressed at the low vcore required for your 4.5 Ghz. 5960k.
01-10-2020 10:59 AM
HeadlessKnight 5960X @ 4.5GHz+DDR4-3200 OC performance scaling with SLI RTX 2080 Ti. Going from bone stock 3.3GHz to 4.5GHz/4.1GHz cache/DDR4-3200, net about 40% performance increase in Far Cry 5 benchmark.
Performance is pretty close to stock 9900k.

01-05-2020 08:38 AM
patryk Hi
I used mainly slot ram 1 3 7 5 error code
19 b0 61 66 55
And when i give it to slot 2 4 8 6
MB say error code 19 b0 55
01-05-2020 08:26 AM
ThrashZone
Quote: Originally Posted by patryk View Post
Hi
Yes i tried with 1 RAM
I also tried with another one
RAM kit and did not help
HI,
That bites man
Looks like a disassembly needed
01-05-2020 08:24 AM
patryk Hi
I used mainly slot ram 1 3 7 5
And when i give it to slot 2 4 8 6
MB say error code 19 b0 55
01-05-2020 08:12 AM
patryk Hi
Yes i tried with 1 RAM
I also tried with another one
RAM kit and did not help
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