Guidance for stablized a 9700K at all core 5.0Ghz?(Bad Chip quality)

[PowerBaller]

The CPU i brought from amazon.ca seem to has the subpar chip quality for OC. ( silicon quality at only 67% according to AI suite 3)

 

Tried 1.30 Volt and 1.32 Volt at all core 5.0 Ghz, 0 muliplier AVX offset. Both runs fails at around 4 mins during the FPU stress test in AIDA64 Extreme, while the ram is clocked at 4000Mhz 17-17-37 at 1.42 Volt. The failure is the Windows 10 blue screen, prior to which the CPU temerature peaks at 65 Celcius, and the clock did not drop. 

 

Despite the failure, i tried to game (battle field 5) with this setting, and it did not fail, at least during a 40 min gameplay.

 

Anyone can advise how much Core voltage i should start with if i want it to survive the FPU test? And should i add 1~2 AVX multiplier offset? Buying a good chip from silicon lottery is not my option as a beginner in OC. 

 

[pizapower]

Maybe your RAM overclock is unstable?

[PowerBaller]

3 minutes ago, pizapower said:

Maybe your RAM overclock is unstable?

My rams are b die Trident Z. Stable at 3600 15-15-35 1.35 Volt, thats why i put 1.43 for 4000 17-17-37.

But thats a point tho I am doing another test with CPU OC only.

 

[pizapower]

4 minutes ago, PowerBaller said:

Thats a point. I am doing another test with CPU OC only 

Or try the other way around

[Jurrunio]

12 minutes ago, PowerBaller said:

My rams are b die Trident Z. Stable at 3600 15-15-35 1.35 Volt, thats why i put 1.43 for 4000 17-17-37.

But thats a point tho I am doing another test with CPU OC only.

 

AIDA64 FPU test is also affected by memory OC. Ideally you should use higher voltage (say 1.4V) to raise CPU temperature (because temperature affects stability, you can do higher memory overclocks when the CPU is cold), do memory OC to the point that you dont wanna change anything in it anymore, then overclock the core.

 

31 minutes ago, PowerBaller said:

Tried 1.30 Volt and 1.32 Volt at all core 5.0 Ghz, 0 muliplier AVX offset. Both runs fails at around 4 mins during the FPU stress test in AIDA64 Extreme,

I've seen 9700k refuse to do 5GHz at 1.4V, so your chip is not the worst yet and you still have headroom.

[PowerBaller]

1 hour ago, Jurrunio said:

AIDA64 FPU test is also affected by memory OC. Ideally you should use higher voltage (say 1.4V) to raise CPU temperature (because temperature affects stability, you can do higher memory overclocks when the CPU is cold), do memory OC to the point that you dont wanna change anything in it anymore, then overclock the core.

 

I've seen 9700k refuse to do 5GHz at 1.4V, so your chip is not the worst yet and you still have headroom.

To the extent of your experience, when OC the CPU and it fails the stress test. Should i add offset value first? or straightly increase the voltage.

[Ebony Falcon]

First off put ram at xmp profile just for arguments sake so we no it's stable,

Then go 1.35v and up llc so it's stable voltage under load 

And see how you get on, report back with results

[Ebony Falcon]

U can go up to 1.45v as long as temps are good (75c with that much voltage) 

Do t bother with avx offset as most of the time it will be at the offset 

 

[Jurrunio]

30 minutes ago, PowerBaller said:

To the extent of your experience, when OC the CPU and it fails the stress test. Should i add offset value first? or straightly increase the voltage.

if you're bothered to use AVX offset, you should do non-AVX stress test instead first, say Prime95 v26.6 smallFFT test. Afterwards, test with AVX and apply AVX offset until it doesn't crash. I'd take it up to 1.4V tho

[PowerBaller]

14 minutes ago, Ebony Falcon said:

First off put ram at xmp profile just for arguments sake so we no it's stable,

Then go 1.35v and up llc so it's stable voltage under load 

And see how you get on, report back with results

Ram clock to 4000Mhz 17-37-37 at 1.38 Volte, CPU 4.8Ghz at 1.28 Volt. 10 Min of FPU stress test, no BSOD, no Clock speed throttle, temp peak at 62 on averge, highest temp on a core peak at 71. Guess i am saving this as the baseline.

[PowerBaller]

44 minutes ago, Ebony Falcon said:

First off put ram at xmp profile just for arguments sake so we no it's stable,

Then go 1.35v and up llc so it's stable voltage under load 

And see how you get on, report back with results

The lowest voltage i can stablize mine at 5.0 Ghz is 1.32V ( No BSOD after 5 min FPU stress); attempted 1.31 and it is not able to boot. I think this may be one of the "eigen cases" .

[PowerBaller]

51 minutes ago, Jurrunio said:

if you're bothered to use AVX offset, you should do non-AVX stress test instead first, say Prime95 v26.6 smallFFT test. Afterwards, test with AVX and apply AVX offset until it doesn't crash. I'd take it up to 1.4V tho

Well i guess your suggestion solves. I reset to a convervatively stable setting first, OC the RAM to a degree to the ceiling of my expectation with tested stability, then start to tune the CPU. Now it survives a 5 min FPU at 1.35V 5.1Ghz, with peak avg tem lower than 70. Guess my chipest isn't that bad after all 

[Ebony Falcon]

Try 1.35v

[Ebony Falcon]

1 minute ago, PowerBaller said:

Well i guess your suggestion solves. I reset to a convervatively stable setting first, OC the RAM to a degree to the ceiling of my expectation with tested stability, then start to tune the CPU. Now it survives a 5 min FPU at 1.35V 5.1Ghz, with peak avg tem lower than 70. Guess my chipest isn't that bad after all 

Just do 5ghz and leave it to stress for a hour 

[PowerBaller]

Just now, Ebony Falcon said:

Try 1.35v

I did and it pass the 5 min test. Going for Prime 95 smallFFT and challenge all the caches now. 

Still this setting is saved as the Sports Mode for my rig.

[PowerBaller]

49 minutes ago, Ebony Falcon said:

Just do 5ghz and leave it to stress for a hour 

Well i test it for 38 mins, which has well emualted way heavier the highest possible workload that demands single core performance i could ever use at home.