9700k Prime95 OC stress test 90-100 C temps. Bad?

jpinard

Limp Gawd
Joined
Oct 10, 2004
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This is the standard GIgabyte 5.1 GHz overclock they have. It’s stable, but these temps sure are high. I don’t know if these temps are unexpected or out of range for the 9700k? Or if my AIO water cooler just isn’t holding up anymore? Or I seated things poorly.

Can someone tell me what I should be getting running small cpu FFT’s with Prime95 on this processor? Thanks!
 
Turn off the OC in the bios, let it run stock. See what you get. Auto-OCing typically ups voltage way too high. No one can tell you what you should be getting specifically. Cases/airflow/ambient temps etc all affect this.
 
Turn off the OC in the bios, let it run stock. See what you get. Auto-OCing typically ups voltage way too high. No one can tell you what you should be getting specifically. Cases/airflow/ambient temps etc all affect this.

Running with no OC I’m at 68 degrees after 10 minutes of Prime95 small FFT’s. I think it was shooting my vCore up to 1.35v with the overclock. I guess I’ll need to overclock this the old fashioned way... something I haven’t done in a long time. Was hoping that easy overclock thing would work.

Thanks for coming in to help, I really appreciate it.
 
68 sounds good. Yeah you would definitely want to fine-tune your OC. If the system is new, I'd personally wait a short while, run it as is, make sure it's 100% stable at stock in the first place. Then slowly move up from there. I think 5ghz is a solid place to be at for that chip, and over that you'll see a loss in performance vs voltage required to get higher.
 
68 sounds good. Yeah you would definitely want to fine-tune your OC. If the system is new, I'd personally wait a short while, run it as is, make sure it's 100% stable at stock in the first place. Then slowly move up from there. I think 5ghz is a solid place to be at for that chip, and over that you'll see a loss in performance vs voltage required to get higher.

Been a while since I’ve done all this. I need to figure out how to set an overclock with an upper vCore boundary. Right now the vCore is all over the place at default. Anywhere from 1.27v to 1.38v running Prime95. Do you think that’s normal at default stock settings?
 
It'll change based on load, vdroop, how many cores are actually being utilised etc. I think a lot of people use core offsets to OC these days, I've personally always done direct input voltage myself with LLC on high. Not sure how applicable this is anymore in the new gen? My OC'd chips were i7 930, 2500k, 4690k. I've not played with anything after haswell. might be best to wait for another to comment. My new Ryzen based system I've left stock so far.
 
Auto-OC in mobo softwares almost always over-volts way way too much. A manual overclock will always result in lower temps and better stability.
 
Auto-OC in mobo softwares almost always over-volts way way too much. A manual overclock will always result in lower temps and better stability.

Agreed. I don't know what the motherboard makers are thinking. Their "auto" setting is just to dump as much voltage as possible.
 
use the avx offset or older 26.6 prime95 to test if you wont be using anything with avx.
 
I’ve seen that term used a few times. What does abs offset mean and does it still stability test as well?
the avx offset was added in coffee lake I think. its a setting in bios that allows the cpu to lower its speed a bit when using avx instructions since they do exactly what you are seeing, it works the cpu so hard it gets extremely hot. prime95 26.6 was the last version without avx so you can use it to test with if you aren't using anything with avx, not much does. so non-avx will run at 5.1 and with avx it will lower to 4.9, something like that, you can set the offset variance in the bios settings.
 
the avx offset was added in coffee lake I think. its a setting in bios that allows the cpu to lower its speed a bit when using avx instructions since they do exactly what you are seeing, it works the cpu so hard it gets extremely hot. prime95 26.6 was the last version without avx so you can use it to test with if you aren't using anything with avx, not much does. so non-avx will run at 5.1 and with avx it will lower to 4.9, something like that, you can set the offset variance in the bios settings.

Thanks for that information. I’ll grab that version of Prime95 then. Just so I’m clear, changing the avx offset it will “only” lower the frequency if it detects that instruction set, and in all other cases the freque nay will remain as normal? So my games would be at full speed?
 
Thanks for that information. I’ll grab that version of Prime95 then. Just so I’m clear, changing the avx offset it will “only” lower the frequency if it detects that instruction set, and in all other cases the freque nay will remain as normal? So my games would be at full speed?
yup, unless it uses avx like GRID2 but its few an far between afaik...
 
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