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My 3950X system just died

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post #1 of 141 (permalink) Old 05-04-2020, 08:21 PM - Thread Starter
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My 3950X system just died

Final update:
Replacement 3950X received under warranty. Back up and running! There were no hassles at all with AMD. Their warranty support is very good.

Updated situation:
Confirmed dead 3950X. I've tried an alternate power supply, DRAM kit, GPU and motherboard. The 3950X won't boot with any of them. Ordered a Ryzen 3600 to try out. It works in both the original system and the 2nd one I built up.




Btw, the 3.65GHz underclock was at 1.1V Vcore under load. While the folding workload was stressful, the settings were not.

Original post:

Background:
My hardware is in my sig. (3950X, Gigabyte X570 Ultra, B-die 2x16GB, 5700XT, Seasonic Prime 750W)

I've been running this system since January. Various PBO overclocks before settling on all-core OCs. While I found a 4.35/4.25GHz stable OC, I usually run a 3.65GHz all core underclock because I've got the CPU running folding about 60 hours a week. I mention this because that is pretty much the most stress the CPU has seen. Even my PBO days, I made sure the CPU never saw 1.3V under load.

So tonight, just sitting idle, the machine went unresponsive, black screen.
Turn off the PSU and Reboot: nothing
Reset CMOS: nothing. Looking at the status LEDs: "CPU" comes on briefly. It progresses to "DRAM" and stays mostly there, but occasionally starts over and CPU lights briefly before settling back on DRAM.
I swapped out DDR4 for another set I had. Tried both sets 1 stick at a time, one channel at a time. Cleared CMOS each time. Same result. Stuck at the DRAM light.


Tomorrow, I'm going to borrow another PSU and GPU to swap out, but I'm not too hopeful. I went ahead an ordered a Ryzen 3600. If the PSU or GPU solve the problem I can return it. If they don't, I'll use the 3600 temporarily while I going through the warranty claim attempt.

CPU
Ryzen 9 3950X
Motherboard
Gigabyte X570 Aorus Ultra
GPU
Powercolor 5700XT Red Devil
RAM
TridentZ B-die @ 3733CL16
Hard Drive
Samsung 970 Pro
Hard Drive
Adata XPG SX8200 Pro
Optical Drive
BD-RE
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Seasonic Prime Titanium 750W
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Noctua NH-D15
Case
Fractal Define R5
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Windows 10 Home
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Corsair K68 Cherry Reds
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Razer Deathadder
CPU
7700K Delid @5.1GHz @1.4V
Motherboard
Asus Z270F Strix
GPU
Asus RX480 Strix @ 1400MHz
RAM
Corsair Vengance PC3200 2x8GB
Hard Drive
Sandisk Ultra II 960GB
Hard Drive
Samsung 970 Pro
Hard Drive
2 x 3TB HDD
Optical Drive
LG BD-R
Power Supply
Seasonic Prime 750W Titanium
Cooling
Noctua NH-D15
Case
Fractal Define R5
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Windows 10 Home
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Last edited by briank; 06-03-2020 at 06:17 AM.
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post #2 of 141 (permalink) Old 05-04-2020, 08:52 PM
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Doesn't sound like memory.. may not be the CPU either. Could be the motherboard ?

Over the years I can't say I have had a CPU die on me but certainly a few motherboards

Good luck
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post #3 of 141 (permalink) Old 05-04-2020, 08:57 PM
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quick reply, my 3800x just died, replacement 3800x gave many similar symptoms and I thought it was dead too, but then found out motherboard pcie slot-2 is real culprit, hope below experience sharing could help you.

ASRock X370 Taichi, bios 6.2
3800x (first unit)
new ram = 4x8GB HOF 3600 c171818 Intel XMP not compatible with Ryzen.
pcie slot-2 occupied by Optane_900p windows boot drive.
or GPU in slot-2, where sometimes I put Optane_900p in pcie slot-1.

Regardless, slot-2 must be occupied.

So the system hangs, windows crash, game crash, all these because ram timing fault, then the real problem comes. Reboot failure. Power off power on boot failure.

************* Dr Debug always loop 33,7a,3b,b6 *****************

1) reset button not working.
2) clear cmos jumper not working.
3) pull out cmos batter also not working.

system cannot boot regardless.

4) reseat CPU, RAM, GPU, Optane_900p, still cannot boot, dr debug 33,7a,3b,b6 persist.
5) boot without cmos battery not working.

6) took CPU+motherboard to warranty centre, immediately boot OK. Dam... dr debug shows more number, especially easy to read and catch is 27, 99, 98, b2,
7) go home boot failure.

8) don't know what I did, boot success, managed to see 27, 99, 98, b2 before windows boot. This is indicator to me. Use a few days, ram timing fault as usual due intel XMP, system hangs, boot loop error code 33,7a,3b,b6


then ram timing fault again, repeat 4), 5), 8).


then ram timing fault again few days later, I had enough, seriously suspect CPU, took it alone to warranty and confirmed dead, replaced a new, so happy, thinking all problem go away....... fresh CPU go home boot failure.


9) take ram+cpu+motherboard to warranty centre, boot OK again, really killing me now, dr debug shows more number, especially easy to read and catch is 27, 99, 98, b2,

10) go home boot failure. Why ???????????????

11) finally, last suspect, must NOT install to pcie slot-2. i.e. either no Optane_900p, boot OK, I can enter bios, I managed to see quick debug go away 27, 99, 98, b2,

12) and I tried boot without GPU, but with Optane_900p in slot-1, code 27, 99, 98, b2 appears means boot success, not boot loop 33,7a,3b,b6.

13) whenever slot-2 is occupied reset button, jump clear cmos, remove battery cmos fail.

14) as long as slot-2 is NOT occupied, reset button works, clear cmos works, remove battery cmos works.

dam ..........

15) solution for now, M.2 socket + convertor riser pcie slot + extension cable to Optane_900p. GPU in slot-1. slot-2 not occupied.

16) ram timing fault, system hang, reset button works.

17) ram timing fault, system hang, dr debug shows new code = A0. no longer boot loop 33,7a,3b,b6, suspect because slot-2 not occupied.

18) no reset, reboot again without reset, error code A0, windows cannot boot.

19) no reset, reboot enter bios, but bios hang, unable to enter bios, error code A0.

20) reboot again A0 does not appear, windows boot success.

before this was using 1700x, none of the above ever encountered. Never before boot loop 33,7a,3b,b6.

Zen 2 is completely different from zen 1.

The problem behavior and symptoms characteristics completely different.



Hope your CPU is OK with minimal hardware, i.e. not even with GPU and SSD.

or must change GPU and SSD locations/slot/socket.

Good luck.

3800x Taichi_X370 Sapphire5700 CX750M [email protected] PoseidonAbsoluteZero3 in Barrow PWM-17w DDC pump> CPU>420x140x28 TT_core_V71
ram 4x8GB HOF4CXLBS3600K17LD162C
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Sapphire 5700 Pulse
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Galax Hall of Fame HOF4CXLBS3600K17LD162C
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post #4 of 141 (permalink) Old 05-04-2020, 09:13 PM
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What voltage did you set for the allcore OC?

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MSI X470 Gaming Plus Max - 1.0.0.6
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2x8GB G.Skill Trident Z 3600C15 @3800 14-15-12-28-40 1T 1.52V
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Samsung 970 Evo Plus 250GB
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be quiet! Dark Rock 4
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Sirtec High-Power 80+ 400W
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post #5 of 141 (permalink) Old 05-05-2020, 03:01 AM
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Had a similar situation with the Aorus Xtreme board on early F3 or something BIOS. No overclocking.
Only a BIOS flashback fixed it.

R9 3950X
(26 items)
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Motherboard
Gigabyte X570 Aorus Xtreme
GPU
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F4-3600C18Q-64GTZN
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post #6 of 141 (permalink) Old 05-05-2020, 06:20 AM - Thread Starter
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Quote: Originally Posted by fcchin View Post
quick reply, my 3800x just died, replacement 3800x gave many similar symptoms and I thought it was dead too, but then found out motherboard pcie slot-2 is real culprit, hope below experience sharing could help you.
<<snipped>>

Good luck.
Thank you fcchin, some good stuff to try.


Quote: Originally Posted by rares495 View Post
What voltage did you set for the allcore OC?
For the 4.35/4.25 CCX overclock, Vcore was set to Normal with a +0.156V dynamic offset, LLC set to Low. The SVI TFN2 measured Vcore under load was 1.225V. CPU temp below 75C when running CB20

For the 3.65GHz "Folding" underclock, Vcore was set to Normal with a +0.100V dynamic offset, LCC set to Standard. SVI TFN2 measured Vcore under load was 1.17V. CPU temp below 73C while folding (AVX workload)


Quote: Originally Posted by Deepcuts View Post
Had a similar situation with the Aorus Xtreme board on early F3 or something BIOS. No overclocking.
Only a BIOS flashback fixed it.
I also had that situation once with an earlier BIOS while I was messing with memory tuning.

I've been running F11 since it came out (a brief try of F12 seemed to mess up my settings so I was lazy and just went back to F11). The system was running on my underclocked profile when it failed, just idle.
A BIOS flashback is worth a try though. I'll add it to the list!

CPU
Ryzen 9 3950X
Motherboard
Gigabyte X570 Aorus Ultra
GPU
Powercolor 5700XT Red Devil
RAM
TridentZ B-die @ 3733CL16
Hard Drive
Samsung 970 Pro
Hard Drive
Adata XPG SX8200 Pro
Optical Drive
BD-RE
Power Supply
Seasonic Prime Titanium 750W
Cooling
Noctua NH-D15
Case
Fractal Define R5
Operating System
Windows 10 Home
Monitor
LG 27GL83A-B 27" Nano-IPS
Keyboard
Corsair K68 Cherry Reds
Mouse
Razer Deathadder
CPU
7700K Delid @5.1GHz @1.4V
Motherboard
Asus Z270F Strix
GPU
Asus RX480 Strix @ 1400MHz
RAM
Corsair Vengance PC3200 2x8GB
Hard Drive
Sandisk Ultra II 960GB
Hard Drive
Samsung 970 Pro
Hard Drive
2 x 3TB HDD
Optical Drive
LG BD-R
Power Supply
Seasonic Prime 750W Titanium
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Noctua NH-D15
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Fractal Define R5
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Last edited by briank; 05-19-2020 at 10:58 AM.
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post #7 of 141 (permalink) Old 05-05-2020, 07:42 AM
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You already seem to be doing everything you need to, swapping out parts for known working parts one at a time. That plus trying a bios flashback already recommended by someone....you'll find the issue I'm sure.


Tossing it out there just in case, try a physical inspection of the motherboard and power supply. Check for shorts, burns, potential areas where contacts may have been bridged by some foreign object that found its way into your computer. Inspect the cpu pins as well and such, make sure all your power supply cables are fully seated/connected and none are burning or have loose terminal crimps.


Best of luck, and hope it's a cheap and easy fix.

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post #8 of 141 (permalink) Old 05-05-2020, 05:26 PM - Thread Starter
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Update:

Q-Flash BIOS reflash - No difference
GPU moved to secondary PCIe slot - No difference
Swapped GPU for different one - No difference
Swapped PSU - Different PSU won't even power up the motherboard. Just makes 2 clicking sounds, like a relay and nothing else happens. Note, this PSU came from a PC that was having random shutdown issues, so it was already suspected bad. Still when it was installed in that system, it would still power up and boot.
Reinstalled my original Seasonic Prime PSU - Still the same behavior. Motherboard gets power, but doesn't progress past the DRAM LED.

CPU
Ryzen 9 3950X
Motherboard
Gigabyte X570 Aorus Ultra
GPU
Powercolor 5700XT Red Devil
RAM
TridentZ B-die @ 3733CL16
Hard Drive
Samsung 970 Pro
Hard Drive
Adata XPG SX8200 Pro
Optical Drive
BD-RE
Power Supply
Seasonic Prime Titanium 750W
Cooling
Noctua NH-D15
Case
Fractal Define R5
Operating System
Windows 10 Home
Monitor
LG 27GL83A-B 27" Nano-IPS
Keyboard
Corsair K68 Cherry Reds
Mouse
Razer Deathadder
CPU
7700K Delid @5.1GHz @1.4V
Motherboard
Asus Z270F Strix
GPU
Asus RX480 Strix @ 1400MHz
RAM
Corsair Vengance PC3200 2x8GB
Hard Drive
Sandisk Ultra II 960GB
Hard Drive
Samsung 970 Pro
Hard Drive
2 x 3TB HDD
Optical Drive
LG BD-R
Power Supply
Seasonic Prime 750W Titanium
Cooling
Noctua NH-D15
Case
Fractal Define R5
Operating System
Windows 10 Home
Monitor
Dell 27" 1080p
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Razer DeathAdder
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post #9 of 141 (permalink) Old 05-05-2020, 05:37 PM
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Quote: Originally Posted by briank View Post
Update:

Q-Flash BIOS reflash - No difference
GPU moved to secondary PCIe slot - No difference
Swapped GPU for different one - No difference
Swapped PSU - Different PSU won't even power up the motherboard. Just makes 2 clicking sounds, like a relay and nothing else happens. Note, this PSU came from a PC that was having random shutdown issues, so it was already suspected bad. Still when it was installed in that system, it would still power up and boot.
Reinstalled my original Seasonic Prime PSU - Still the same behavior. Motherboard gets power, but doesn't progress past the DRAM LED.
Either the CPU or motherboard is completely dead.

[email protected] ghz, RX Vega 64, 32GB DDR4, Gigabyte Aorus Master, Seasonic Platinum 1000W, Corsair 760T
Alt: MSI GT73VR Throttlebook with 7820HK @ 4.7 ghz, GTX 1070 MXM TDP mod to 230W, 32 GB RAM

Quote: Originally Posted by sakete View Post
Well, I want you to know I have an academic degree in speculation.
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post #10 of 141 (permalink) Old 05-05-2020, 07:16 PM - Thread Starter
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Unfortunately, support from either Gigabyte or AMD is very slow. I filed support requests 48 hours ago and not a peep from either.

CPU
Ryzen 9 3950X
Motherboard
Gigabyte X570 Aorus Ultra
GPU
Powercolor 5700XT Red Devil
RAM
TridentZ B-die @ 3733CL16
Hard Drive
Samsung 970 Pro
Hard Drive
Adata XPG SX8200 Pro
Optical Drive
BD-RE
Power Supply
Seasonic Prime Titanium 750W
Cooling
Noctua NH-D15
Case
Fractal Define R5
Operating System
Windows 10 Home
Monitor
LG 27GL83A-B 27" Nano-IPS
Keyboard
Corsair K68 Cherry Reds
Mouse
Razer Deathadder
CPU
7700K Delid @5.1GHz @1.4V
Motherboard
Asus Z270F Strix
GPU
Asus RX480 Strix @ 1400MHz
RAM
Corsair Vengance PC3200 2x8GB
Hard Drive
Sandisk Ultra II 960GB
Hard Drive
Samsung 970 Pro
Hard Drive
2 x 3TB HDD
Optical Drive
LG BD-R
Power Supply
Seasonic Prime 750W Titanium
Cooling
Noctua NH-D15
Case
Fractal Define R5
Operating System
Windows 10 Home
Monitor
Dell 27" 1080p
Mouse
Razer DeathAdder
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