Should I return this 4790K?

[Hugo Vedal]

I just swapped in my 4770k because the thermals were very bad for a 4790k. The problems got even worse, I updated bios, did a fresh win10 install and started benchmarking. At stock settings with XMP enabled, the 4790k hit 100C at a 3.9GHz thermal throttle. I use a CM hyper 212 evo cooler with cheap thermal paste and car window washer fluid for cleaning the cpu/heatsink, define S case, Gigabyte Z87X-UD3H mobo, 4 x 4 GB Vengeance Pro 1600 memory and intel pro graphics. I know that I can't expect any high overclocks, but 100C on 3.9GHz seems just stupid to me.

 

I use Prime 95 (blend and small-FFT) for stress testing

55C idle (14%) and 100C at full load at 3.9GHz

Stock graphics off CPU (should only add a couple of degrees)

 

I still have 26 days to return the chip if I want to, should I do it? Or is it some setting that I'm missing?

[Zero_Hour]

What are the temps on the 4770k?

Also make sure that the voltages aren't going ssg when you're using prime 95

[Hugo Vedal]

3 minutes ago, lopj245 said:

What are the temps on the 4770k?

 

Better, topped out at about 93C on 3.8GHz (still bad though)

[Godlygamer23]

Is the heat sink mount on the CPU proper? What about thermal paste application?

[reesercollins]

Reseat the cooler. That should help the temps

 

Thanks,

Reese

[Jacktastic-Mofo]

I think it may be your mount / thermal paste that is fucking you over because there is no way either of those CPU's should EVER get that hot on an hyper 212.

[2FA]

Sounds like you aren't mounting the cooler correctly. Don't use window washer fluid, use isopropyl alcohol.

[thekeemo]

use aida64 to test

[Zero_Hour]

Don't forget that some mobos had the whole voltage issue with prime 95 but  a reseat is a good idea

[Hugo Vedal]

The chip is running at about 1.2V idle and 1.27 under full load, is that unusually high or normal?

[Hugo Vedal]

Definitely going out tomorrow to buy isopropyl alchohol + reseating the cooler if I dont get it to work tonight

[ShadyHost]

Yeah those temps aren't right. My old 4770k never saw anything close to that high.....and I had a 212 Evo for a while as well. 

 

You're even using the same board I used to have. 

[DunePilot]

That is way hot for 1.27v... maybe you don't have the cooler on very good.

[Hugo Vedal]

It only cranks up to 78C in Aida64 stress test though, but P95 small-FFT should not be a problem on stock frequencies right?

[Godlygamer23]

1 minute ago, Hugo Vedal said:

It only cranks up to 78C in Aida64 stress test though, but P95 small-FFT should not be a problem on stock frequencies right?

When using P95, what is your voltage? What kind of voltage are you using? Adaptive?

[DunePilot]

3 minutes ago, Hugo Vedal said:

It only cranks up to 78C in Aida64 stress test though, but P95 small-FFT should not be a problem on stock frequencies right?

I avoid Prime 95 like the plague. Run IBT, or Aida, Cinebench etc... If all those are staying 85 and under you're ok I would think. Pick up a tube of MX-4 when you reseat the cooler and maybe that'll help a little as well.

[Hugo Vedal]

4 minutes ago, Godlygamer23 said:

When using P95, what is your voltage? What kind of voltage are you using? Adaptive?

Voltage in P95 is 1.272V, it is on stock bios settings, so I don't know if it's static or adaptive. It stays on 1.26-1.27V on idle, so I guess static.

[Guest]

I've always heard that Haswell doesn't play well with Prime95...my 4790k would also top out at 100C in a basic stress test. But with Aida64 it didn't get above 55C. 

 

[Godlygamer23]

3 minutes ago, Hugo Vedal said:

Voltage in P95 is 1.272V, it is on stock bios settings, so I don't know if it's static or adaptive. It stays on 1.26-1.27V on idle, so I guess static.

So does that mean XMP is disabled right now too?

[Hugo Vedal]

37 minutes ago, Godlygamer23 said:

So does that mean XMP is disabled right now too?

XMP enabled. Not sure what setting though, couldnt find it in the uefi.

[Hugo Vedal]

update: Removed and mounted the cooler with new thermal paste and did a full bios reset (enabling xmp after). Temps are much better, maxing out at around 73C @4.3GHz in P95 blend and Aida64. Still jumps to 100C on P95 small-FFT. Is this test realistic at all, or should I just ignore it?

[SteveGrabowski0]

I don't have a 4790k, but I would absolutely return any cpu that throttled at stock speed under Prime95 SmallFFT. My Xeon E3-1231v3 maxes out at about 81C on Prime95 small FFT while running at the full quadcore turbo of 3.6 GHz, using the stock cooler. And I'm talking about running it for a few hours with no dips below the quadcore turbo clock. The very first thing I did when I got my E3-1231v3 was run Prime95 SmallFFT for three hours to make sure it never went below the quadcore turbo clock at 100% percent load on all cores.

[SteveGrabowski0]

If you're throttling at 4.2 GHz then you don't have the cpu you paid for. 4790k's are expensive as hell and I wouldn't accept one that can't live up to its official spec. Now if you're only throttling on 4.3 GHz then that's just the silicon lottery. These things are supposed to run at 4.2 GHz on quadcore loads on the stock cooler, much less a far superior Hyper 212 EVO.

[roctrebira]

3 hours ago, Hugo Vedal said:

update: Removed and mounted the cooler with new thermal paste and did a full bios reset (enabling xmp after). Temps are much better, maxing out at around 73C @4.3GHz in P95 blend and Aida64. Still jumps to 100C on P95 small-FFT. Is this test realistic at all, or should I just ignore it?

Dont pay attention to the prime95 it doesn't play well with the haswell chips just use aida64. So on that note you are fine.

[Hugo Vedal]

Found out about the issue, this chip just doesnt want to go past 4.3 GHz. I have to give the CPU over 1.2V to get a stable 4.4GHz (which means mad overheating), but only 1.090V to get a stable 4.2 or 4.3 GHz. Temps are below 90C in P95 small-FFT and below 70C in Aida64. Thanks for the support guys!