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AMD PILEDRIVER - Individual Core/Module Failure [Discussion Thread] (Stability Issues - Stock and Overclocked) - Page 2

post #11 of 69
Thread Starter 
Updates

So I received my RMA replacement CPU from AMD just before Christmas (Christmas Eve actually) After finally having time to test and compare it to my results from the defective one here is what I have.


** Temperatures are not typical. This test was done with the back panel off, with a large fan pushing 18 Celsius Ambient Air onto the back of the motherboard Also note that I'm using different Ram compared to my other results. I run both Kingston HyperX and my Samsung 30nm and have tested with both.

Here is a screenie of the new CPU running 4.7Ghz (all 8 cores) IBT on High settings.
Although this CPU runs much hotter than the defective one, (results may vary) there are no signs of
"Per Core Limitations/Defects"
With some quick settings it was able to run 5.0Ghz @ 1.5v IBT on Standard. This is near the limitations of my Motherboards Power Delivery, so I'm not expecting more, or to be fully stable at this setting.
Edited by ComputerRestore - 1/2/13 at 10:50am
post #12 of 69
Quote:
Originally Posted by ComputerRestore View Post

Thanks for the info Mr.N00bLaR
Did you also try running only cores 1 and 2, and 5 and 6, to see if cores 5 and 6 would still fail over 4400Mhz.
A couple of other questions as well,
1) Do you know what Batch # your cpu is?
2) Do you have another motherboard you could try? as I'm very curious if this is a CPU socket issue, rather than CPU itself.
Forgot to replay to this. Yes, the third module just doesn't seem to want to go any higher. I got roughly the same overclock results when I kept module 3 on and turned off module 2 as when I had all three modules enabled. At the time I didn't realize what was happening though. I did not write down any information that was printed on my chip, is it displayed anywhere on the packaging or in the manual that comes with the CPU? I do not have another board to test with or another CPU to test in my board.

I use .5 multis, I don't think I have any issues with them. As far as I can tell with limited testing, I can set my FSB to anything under ~252 and get stability in Prime95.
Edited by Mr.N00bLaR - 1/2/13 at 8:37am
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post #13 of 69
8350 info:
FD8350FRW8KHK
FA1242PGT
9K13362J20414

Stock vCore - 1.368 non-Turbo/ ~1.45 Turbo

I could not get a stable OC above 4.5 as I would get hardlocks at any vCore.

I have an RMA in and I'll post up the results once the new chip arrives.
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post #14 of 69
Thread Starter 
Quote:
Originally Posted by Mr.N00bLaR View Post

Forgot to replay to this. Yes, the third module just doesn't seem to want to go any higher. I got roughly the same overclock results when I kept module 3 on and turned off module 2 as when I had all three modules enabled. At the time I didn't realize what was happening though. I did not write down any information that was printed on my chip, is it displayed anywhere on the packaging or in the manual that comes with the CPU? I do not have another board to test with or another CPU to test in my board.
I use .5 multis, I don't think I have any issues with them. As far as I can tell with limited testing, I can set my FSB to anything under ~252 and get stability in Prime95.

Thanks for the update.
Your CPU sounds just like mine. The only way to find the batch number is on the CPU IHS. It's not actually the Batch Number that AMD uses, because it just indicates the year and week it was made. But it's better than nothing.
Don't worry about testing on another board. My replacement CPU works perfect on this same board.
AMD doesn't seem to have a problem replacing them, so that's an option at least.
I wouldn't have replaced mine if the frequency issue wasn't so close to what the Turbo will boost to (4.2 Turbo -> Issues above 4.5Ghz). If that chip degraded at all I'd run into corrupted hard drives and all that good stuff.

It's good to know it was just bad Silicon or manufacturing defect though.
Quote:
Originally Posted by BenC View Post

8350 info:
FD8350FRW8KHK
FA1242PGT
9K13362J20414
Stock vCore - 1.368 non-Turbo/ ~1.45 Turbo
I could not get a stable OC above 4.5 as I would get hardlocks at any vCore.
I have an RMA in and I'll post up the results once the new chip arrives.

Will be looking forward to your results. Being stuck at 4.5Ghz with a Sabertooth and Custom Water would not be fun. Did you end up following what I did before submitting your RMA? Let me know if there's anything else I should add for anyone else that may end up reading this.
Edited by ComputerRestore - 1/2/13 at 9:19am
post #15 of 69
Unfortunately I did not write down which cores were failing or try to isolate specific cores.

My biggest issue was wild fluctuations in vCore even at stock settings. I put my old cpu back in yesterday and so far vCore has been rock steady.
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post #16 of 69
Quote:
Originally Posted by ComputerRestore View Post

Thanks for the update.
Your CPU sounds just like mine. The only way to find the batch number is on the CPU IHS. It's not actually the Batch Number that AMD uses, because it just indicates the year and week it was made. But it's better than nothing.
Don't worry about testing on another board. My replacement CPU works perfect on this same board.
AMD doesn't seem to have a problem replacing them, so that's an option at least.
I wouldn't have replaced mine if the frequency issue wasn't so close to what the Turbo will boost to (4.2 Turbo -> Issues above 4.5Ghz). If that chip degraded at all I'd run into corrupted hard drives and all that good stuff.
It's good to know it was just bad Silicon or manufacturing defect though.
Will be looking forward to your results. Being stuck at 4.5Ghz with a Sabertooth and Custom Water would not be fun. Did you end up following what I did before submitting your RMA? Let me know if there's anything else I should add for anyone else that may end up reading this.


Hmm.. MY CPU stock turbo is 4.1GHz and I can't get the last module past 4.45GHz, I wonder if I should look into that.. I have forgotten to update my sig rig but I also have a custom water cooling system that seems to work well. I started with the A70 and then installed my loop. Unfortunately I cannot overclock any higher with the water cooling system than I could with the air if all 6 cores are enabled. How long were you without your chip total days-wise?

Side note, I wonder if all clocks will require more voltage for the 3rd module or if that's just a sticking point for the module.
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post #17 of 69
I'm getting a failure on my 8th core (so 4th module I guess) at ~1.4V - 4.5Ghz, all other are rock solid. If I pump 1.45V, the module become stable, but it's the max OC I can get from it.

Do you think I can get a replacement for this chip? Even auto-voltage at stock speed/voltage the 4th module is unstable...

EDIT:

Swapped my P2 back, here's the FX-8350 batch number:

FD8350FRW8KHK
FA 1244PGT
9M24312K20133
Edited by Vaub - 1/2/13 at 10:41am
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post #18 of 69
Thread Starter 
I should add that with my new CPU in order to run at 4.7Ghz or above:
- I had to increase the CPU/NB Voltage from 1.18v (Auto LLC) to 1.25v (High LLC)
- I had to increase the Amperage for CPU and CPU/NB to 130%
- This allowed me to run with a vCore of 1.416v (Ultra High LLC)
- I could accomplish the same thing by running 1.47v+ for the CPU and 1.18v on the CPU/NB (Auto LLC)

Quote:
Originally Posted by Mr.N00bLaR View Post

Hmm.. MY CPU stock turbo is 4.1GHz and I can't get the last module past 4.45GHz, I wonder if I should look into that.. I have forgotten to update my sig rig but I also have a custom water cooling system that seems to work well. I started with the A70 and then installed my loop. Unfortunately I cannot overclock any higher with the water cooling system than I could with the air if all 6 cores are enabled. How long were you without your chip total days-wise?
Side note, I wonder if all clocks will require more voltage for the 3rd module or if that's just a sticking point for the module.

I sent my RMA back with Canada Post so it took like 2 weeks. It would have been probably a week or less if I sent FedEx. (it took 9 days to process because of Canada Post, which was my fault)

For your Side Note - From seeing others' Overclocks I'd say the stability issue can be overcome to a degree by Overvolting. Not all of them are able to though, mine made no difference at 1.5v, which is more than enough for 4.5Ghz.

So to answer that question, Yes, you could end up finding that with your 2 good Modules you may only need 1.33v (estimate) to run 4.5Ghz. Where as you may find stability with all 3 Modules at 1.5v for 4.5Ghz. Which is really no good at all.
Quote:
Originally Posted by Vaub View Post

I'm getting a failure on my 8th core (so 4th module I guess) at ~1.4V - 4.5Ghz, all other are rock solid. If I pump 1.45V, the module become stable, but it's the max OC I can get from it.
Do you think I can get a replacement for this chip? Even auto-voltage at stock speed/voltage the 4th module is unstable...

If you were able to rule out any other possible issues - RAM, Motherboard, Power Supply etc. I'd recommend you get a replacement.
It's important to rule out other possible issues, because if you RMA it through AMD, they do test it. But..worst case scenario, they tell you it's fine.
It cost me $24 to send mine in, (tracking + insurance) so it was worth it for me.
Edited by ComputerRestore - 1/2/13 at 10:48am
post #19 of 69
Quote:
Originally Posted by ComputerRestore View Post

If you were able to rule out any other possible issues - RAM, Motherboard, Power Supply etc. I'd recommend you get a replacement.
It's important to rule out other possible issues, because if you RMA it through AMD, they do test it. But..worst case scenario, they tell you it's fine.
It cost me $24 to send mine in, (tracking + insurance) so it was worth it for me.

All are ruled out as it was a simple swapping of a Phenom II X6 1090T that was running at 1.48V since the last 5 months.
I have send a RMA request to NCIX as I received the chip monday .
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post #20 of 69
Thread Starter 
Quote:
Originally Posted by Vaub View Post

All are ruled out as it was a simple swapping of a Phenom II X6 1090T that was running at 1.48V since the last 5 months.
I have send a RMA request to NCIX as I received the chip monday .

I'm sure you'll find you made the right choice. All the items for your sig rig, are good quality so there's no question there, that's it's probably a bad CPU.
(I'd ask what BIOS you have installed, but the Piledriver CPU's work half decent even on old Bulldozer BIOS's)

Please update when you get your replacement.

Yours will be the first 1244PGT so far that I've seen to have issues.
Edited by ComputerRestore - 1/2/13 at 11:10am
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