• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

Overclocking 4790k

D

doox00

2[H]4U
2FA
Joined
Aug 28, 2005
Messages
3,476
Hey all, what is the most used/recommended software to use to test an overclock for stability? I always used prime95 small fft a long time ago when I was more into overclocking (years and years ago) and now I really don't know what the norm would be. I just used Asus ai tuner to put an oc on my 4790k previously but now I rebuilt my system and fresh install of windows 10 etc and want to mess with the oc myself. Right now with 1.29 vcore at 4.7ghz in prime95 small fft it goes to 100c almost right away.. but I run something like linX it maxes out in the 50's or so. What should I be using to do a safe good test for stability and why does it hit 100c in prime95 running small fft and anything else I run it barely hits 60c on all cores.

Anyone have a good guide on manually overclocking a 4790k? I have an Asus Z97-Pro motherboard. As of now I have just changed vcore and core multiplier.. not sure what else to mess with. :)

I am using hwmonitor to see temps and have a H100i gtx cooler.

thanks all!!
 
Last edited:
Asus Realbench or x264. These will both exercise the processor well but not drive up the temps too high with the pur AVX2 that prime 95 and IBT use.
 
GeneO said:
Asus Realbench or x264. These will both exercise the processor well but not drive up the temps too high with the pur AVX2 that prime 95 and IBT use.
Click to expand...

Ok, so is that normal to get 100c temps using prime 95 small ffts?
 
doox00 said:
Ok, so is that normal to get 100c temps using prime 95 small ffts?
Click to expand...

Yes, if you are using a version of P95 newer than 26.6 (or so). The newer versions support Intel's AVX instructions, which really stress the processor WAY past what you can expect from normal/everyday use.

I just installed a new motherboard with a 4790K, and was shocked at the temps I was getting in P95. I thought I had mounted the heatsink wrong. :)
 
BlueWeasel said:
Yes, if you are using a version of P95 newer than 26.6 (or so). The newer versions support Intel's AVX instructions, which really stress the processor WAY past what you can expect from normal/everyday use.

I just installed a new motherboard with a 4790K, and was shocked at the temps I was getting in P95. I thought I had mounted the heatsink wrong. :)
Click to expand...

lol, so did I, I took the h100 off, cleaned off the thermal paste and reapplied new stuff and had same results, crazy.
 
I just checked....P95 v26.6 is the correct version. After switching to it, the core temps dropped 20-25C. :cool:
 
In researching the expected OC and voltage for the 4790K, many seem to recommend ASUS RealBench, particularly the x264 stress test. I haven't run it yet (it's currently downloading)...

Download link at MG
 
BlueWeasel said:
In researching the expected OC and voltage for the 4790K, many seem to recommend ASUS RealBench, particularly the x264 stress test. I haven't run it yet (it's currently downloading)...

Download link at MG
Click to expand...

Thanks, been using it while I mess with my oc, so far 4.8 at 1.32 vcore, hitting 82C. That is probably the limit I am guessing unless I want to run 90c under full load lol. Was hoping to get 4.8 at around 75C.
 
That is about what I get on realbench at 4.8 GHz with a bit less voltage (on air but should be about the same). If it really OC stable, you can delid it and get much lower temp.
 
GeneO said:
That is about what I get on realbench at 4.8 GHz with a bit less voltage (on air but should be about the same). If it really OC stable, you can delid it and get much lower temp.
Click to expand...

I have never delid a cpu, I will look in to how to do it and how easily it would be to ruin it if I do it wrong lol :)

Ended up at 4.8ghz at 1.32 vcore about 75c on average while running realbench with peak of 82c. I tried 4.9 and could not keep it stable at all, even at 1.36 volts it would crash/lockup. temps did not raise much more than at 4.8 and 1.32 though. I stopped and just went back to 4.8, did not seem worth it if I was going to have to pump 1.4 into it and much higher temps. Maybe this cpu just won't do 4.9 and higher.
 
Last edited:
Nebulous said:
Dood excellent chip! I'm @ 4.7Ghz with the same voltage :(
Click to expand...

I was not sure if it was a good one or not, haven't really looked into what the good ones can do. I got this when they came out and just used asus ai tuner to oc it. It put it at 4.8 as well, not sure what the voltage it was giving it though, never looked. I was hoping I could do better doing it manually.. and maybe I could if I knew what I was doing haha. I just know the basic stuff to adjust, voltage and multiplier. Should I or could I mess with the input voltage, its at 1.72 or something like that now (think that is default of what my mb had it set to).
 
I'm sure it's been asked before, but what's the recommended max temp for an overclocked 4790K when running these stress tests?
 
doox00 said:
I have never delid a cpu, I will look in to how to do it and how easily it would be to ruin it if I do it wrong lol :)

Ended up at 4.8ghz at 1.32 vcore about 75c on average while running realbench with peak of 82c. I tried 4.9 and could not keep it stable at all, even at 1.36 volts it would crash/lockup. temps did not raise much more than at 4.8 and 1.32 though. I stopped and just went back to 4.8, did not seem worth it if I was going to have to pump 1.4 into it and much higher temps. Maybe this cpu just won't do 4.9 and higher.
Click to expand...

Or you could have Silicon lottery do it for you. I am thinking about doing that because I am a bit of a hardware klutz. My chip will do 4.7 @ 1.24V VID (adaptive running) and 4.8 @ 1.275 solid stable, so it may be worth it.
 
GeneO said:
Or you could have Silicon lottery do it for you. I am thinking about doing that because I am a bit of a hardware klutz. My chip will do 4.7 @ 1.24V VID (adaptive running) and 4.8 @ 1.275 solid stable, so it may be worth it.
Click to expand...

Pretty cool idea they have.. so they will oc for you as well or you just buy one that they have already tested and selling as a chip capable of x ocs? Sounds like you have an awesome example.. 4.8 at 1.275, is it able to do 4.9 or 5 with a little more voltage? Did you buy the cpu from them then?
 
doox00 said:
Pretty cool idea they have.. so they will oc for you as well or you just buy one that they have already tested and selling as a chip capable of x ocs? Sounds like you have an awesome example.. 4.8 at 1.275, is it able to do 4.9 or 5 with a little more voltage? Did you buy the cpu from them then?
Click to expand...

You buy one that they already have tested and certified. However, you can send a chip in to have it delided and reassembled with CLU paste.

No, I just got lucky (for once :D )
 
You must log in or register to reply here.
Back
Top