Prime95 failure.

[orlando690]

So I ran a stress test and atleast 2 cores have failures. It was a blend test.

3 workers failed. 2 rounding and 1 sum

 

Can I be sure this is cpu failure? 

 

I set my ram at 3200 (stock is 3000) I did a memtest86 on 3000

 

Specs:

3700x stock everything

B450m mortar

T force Vulcan 3000mhz only OC Mhz to 3200

Msi rtx 2070 super gaming x trio

 

Edit:

The 3 cores that showed failure have now stopped working. 

 

I stopped the test. Didn't do a hw monitor so all I know is that max temp was 86 at time of me taking a look. Idle Temps are around 50 they have been since I put the pc together. 

[goto10]

post your specs

 

is extremely rare that a bad cpu works and has damaged cores, give us more details like overclockingn and more

[Aimi]

If your CPU was actually failing you'd notice it outside of Prime95. Might've been a problem with the test itself.

[orlando690]

1 minute ago, goto10 said:

post your specs

 

is extremely rare that a bad cpu works and has damaged cores, give us more details like overclockingn and more

RAM was just changed to 3200 on the Bios. That's it. No voltage that's on auto. 

 

3700x 

B450m mortar

T force Vulcan 3000mhz

Msi rtx 2070 super gaming x trio

[orlando690]

2 minutes ago, Aimi said:

If your CPU was actually failing you'd notice it outside of Prime95. Might've been a problem with the test itself.

I haven't used my pc for anything yet. 

 

I've done Prime95 for 24 hrs on 3 other pcs 2 Intel and 1 3400g. Never seen a failure. 

 

This test has ran for about 6 hrs

[goto10]

who has time to run a test for that long?

 

i ran prime for 10 minutes

 

memory is running and what voltage

 

cpu is running on what overclock, also what cpu heatsink are you using, provide details

[Aimi]

Just now, orlando690 said:

I haven't used my pc for anything yet. 

You wouldn't need to. A faulty CPU is incredibly obvious and can be spotted during boot.

If anything, you're probably just overheating it.

[orlando690]

2 minutes ago, goto10 said:

who has time to run a test for that long?

 

i ran prime for 10 minutes

 

memory is running and what voltage

 

cpu is running on what overclock, also what cpu heatsink are you using, provide details

The 3 failed cores stopped working. 

 

Nothing is overclocked. Except the ram. All I did to the ram was set the frequency to 3200 on the Bios and left auto voltage. 

 

According to dragon center it's at 1.3760 again that's auto. I know on stock it was around 1.2

[orlando690]

2 minutes ago, Aimi said:

You wouldn't need to. A faulty CPU is incredibly obvious and can be spotted during boot.

If anything, you're probably just overheating it.

Ijust saw it at 86 and it lowered to 80 right now. Getting up slowly. 

 

That isn't that high to be the problem right? 

I have 6 cheap ass fans from the diyPC trio GT rgb (3 intake and 3 out) granted the intakes have small area to get air from

[Bitter]

2 minutes ago, Aimi said:

You wouldn't need to. A faulty CPU is incredibly obvious and can be spotted during boot.

If anything, you're probably just overheating it.

No, a failing CPU is not always that obvious. I've had an OC or an undervolt that was not Prime95 stable plenty of times that would boot and run fine otherwise. I've had OC's and undervolts that would boot Linux fine but not boot Windows at all. I've had problems only in a specific game with an OC or UV that was otherwise stable. I've had an OC or UV that passed 24hrs of Prime95 stress but crashes out after several days of doing Prime95 distributed work.

1 minute ago, orlando690 said:

The 3 failed cores stopped working. 

 

Nothing is overclocked. Except the ram. All I did to the ram was set the frequency to 3200 on the Bios and left auto voltage. 

 

According to dragon center it's at 1.3760 again that's auto. I know on stock it was around 1.2

They stopped working entirely and currently are not working at all? or those test threads stopped?

My guess would be that since it failed in a blend test and you just set the RAM to 3200 that it could be a RAM issue. Set the RAM back down to what it was before and run again for at least 24hrs in blend or in large fft or whatever targets RAM specifically and see if it fails out. If it does then you have an issue not related to the RAM. Slowly step the RAM speeds up until you have an issue, back it down, retest. You can run different tests to test different parts of the system, small fft is good for checking the CPU only as well as the cooling system. Because of the large cache on that CPU you may need to manually set some sizes to push more testing out into RAM for it to be more thorough.

[orlando690]

13 minutes ago, Bitter said:

They stopped working entirely and currently are not working at all? or those test threads stopped?

Just the threads stopped. Workers 13,14, and 15 stopped.

I had to go away from the pc. But I'll set it back to 3000 on the Bios. Or auto. 

Question: when it was on auto it showed me 2400mhz. But this is 3000mhz. When I did the memtest86 I didn't leave it on auto I clicked on 3000mhz. So does that mean my ram automatically runs at that lower frequency and why? 

[Bitter]

That I'm not sure of, you may be able to get 3200 or 3000 stable by relaxing timings or upping voltages some. If it's got XMP profile that should 'just work' but it doesn't always. You should look up the RAM specs and see if you're setting them all properly to run at the rated speed.

[orlando690]

11 minutes ago, Bitter said:

That I'm not sure of, you may be able to get 3200 or 3000 stable by relaxing timings or upping voltages some. If it's got XMP profile that should 'just work' but it doesn't always. You should look up the RAM specs and see if you're setting them all properly to run at the rated speed.

The timings remain the same as advertised. Have not changed that. It's supposed to be at 3000mhz stock. But the Bios when I first got into it it said frequency auto and just under that it said 2400mhz.

So on frequency I set it to 3000 which is stock. Memtest86 told me everything fine. 

I forgot that I wanted to OC to 3200 so I forgot to test that before doing prime95. 

 

I am afraid to use xmp profile because on my 3400g build it made me clear the cmos, not looking forward to that. Same ram just 8 gigs. I clicked on xmp profile 1. 

Also on the 3400g the pc itself told me the ram was at 2400mhz so that's why with this pc I didn't leave it auto I made sure it said 3k

[Tom H]

 

1 hour ago, orlando690 said:

Just the threads stopped. Workers 13,14, and 15 stopped.

I had to go away from the pc. But I'll set it back to 3000 on the Bios. Or auto. 

Question: when it was on auto it showed me 2400mhz. But this is 3000mhz. When I did the memtest86 I didn't leave it on auto I clicked on 3000mhz. So does that mean my ram automatically runs at that lower frequency and why? 

have you tried running the test with the ram at stock yet? The blended test will push ram and memory controller so it could lead to your issues

 

Ram will run at 3000mhz once you enable XMP

[orlando690]

11 minutes ago, Tom H said:

 

have you tried running the test with the ram at stock yet? The blended test will push ram and memory controller so it could lead to your issues

 

Ram will run at 3000mhz once you enable XMP

Afraid of xmp. Had my system with 3400g require a clear cmos situation. Same ram just 8 gigs instead of 16.

 

I am decided to memtest86 at 3200mhz instead. Thought it would be faster. Just started. 

Its says DDR4 xmp 2998. But I know mtest doesn't always report correct values and on bios it's set to 3200 specifically

[Bitter]

memtest just sees if the things read back correctly, prime95 actually puts things under load so if memtest passes be sure to test with prime95 next to make sure it's stable.

[orlando690]

6 hours ago, Bitter said:

memtest just sees if the things read back correctly, prime95 actually puts things under load so if memtest passes be sure to test with prime95 next to make sure it's stable.

But I already know there's a failure. So this means that it is the cpu and not the ram. Atleast that's the way I see it. 

[goto10]

2 minutes ago, orlando690 said:

But I already know there's a failure. So this means that it is the cpu and not the ram. Atleast that's the way I see it. 

if you are already convinced that you have a faulty part, rma, is the right thing to do

[bowrilla]

1st Don't just dial in the memory clock, choose the right timings. If you bought 3000 memory, test it first this way. Some overclocks need adjusted voltages.

 

2nd Run HWinfo64 parallel an check all values.

 

3rd run a stress test at all stock and with BIOS set to default to get a baseline. If that works and the OC fails then you know where the issue is.