Overclocking i7 4790K
- Thread starter Widow76
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Man of Honour
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Hi and welcome to the forums. 
I have just picked up a 4790k myself to replace my mediocre 4670k. It is seeming like my 4790k is mediocre as well unless something changes. I can do 4.9Ghz Asus Realbench stable but only 4.6Ghz at 1.260v vcore Linx stable. Anything above that and no matter how much voltage I use just crashes. I am going to tweak it more today as I really wanted to hit 4.8Ghz with this cpu.
As a starting point set vcore to 1.25v (manual) and the multiplier to 45x (all cores). Most should do this so if it boot's fire up a stress testing program and monitor the temps. As you increase the voltage the temps will go through the roof. I have high end custom watercooling with a pair of 360mm fat rads and still hit 84 degrees C!!
I have just picked up a 4790k myself to replace my mediocre 4670k. It is seeming like my 4790k is mediocre as well unless something changes. I can do 4.9Ghz Asus Realbench stable but only 4.6Ghz at 1.260v vcore Linx stable. Anything above that and no matter how much voltage I use just crashes. I am going to tweak it more today as I really wanted to hit 4.8Ghz with this cpu.
As a starting point set vcore to 1.25v (manual) and the multiplier to 45x (all cores). Most should do this so if it boot's fire up a stress testing program and monitor the temps. As you increase the voltage the temps will go through the roof. I have high end custom watercooling with a pair of 360mm fat rads and still hit 84 degrees C!!
Hi and welcome to the forums.
I have just picked up a 4790k myself to replace my mediocre 4670k. It is seeming like my 4790k is mediocre as well unless something changes. I can do 4.9Ghz Asus Realbench stable but only 4.6Ghz at 1.260v vcore Linx stable. Anything above that and no matter how much voltage I use just crashes. I am going to tweak it more today as I really wanted to hit 4.8Ghz with this cpu.
As a starting point set vcore to 1.25v (manual) and the multiplier to 45x (all cores). Most should do this so if it boot's fire up a stress testing program and monitor the temps. As you increase the voltage the temps will go through the roof. I have high end custom watercooling with a pair of 360mm fat rads and still hit 84 degrees C!!
I had to delid my 4790k and it made the world of difference, 4.7Ghz / 60deg load temps max etc under one of those nzxt all in ones.
Hi and welcome to the forums.
I have just picked up a 4790k myself to replace my mediocre 4670k. It is seeming like my 4790k is mediocre as well unless something changes. I can do 4.9Ghz Asus Realbench stable but only 4.6Ghz at 1.260v vcore Linx stable. Anything above that and no matter how much voltage I use just crashes. I am going to tweak it more today as I really wanted to hit 4.8Ghz with this cpu.
As a starting point set vcore to 1.25v (manual) and the multiplier to 45x (all cores). Most should do this so if it boot's fire up a stress testing program and monitor the temps. As you increase the voltage the temps will go through the roof. I have high end custom watercooling with a pair of 360mm fat rads and still hit 84 degrees C!!
Thank you for your replie! I'm planning on buying a NZXT X62 or Deepcool 240X White in the future. What do you guys think I can achieve with the Cryorig H7?
If it will boot & run stable at 1.25vlts, 4.6Ghz then you have a top tier Haswell/Devils Canyon chip.
..after that it will all depend on how your air cooler copes with the voltage, but 4.8Ghz is as good as you will get regardless of how much voltage you put in, usually 4.8Ghz will require 1.35-1.40vlts and a premium water cooler.
4.6Ghz is the sweet spot for these CPU's and I really wouldn't worry about going higher than that TBH, as the difference will be all but imperceptible in day to day use.
..after that it will all depend on how your air cooler copes with the voltage, but 4.8Ghz is as good as you will get regardless of how much voltage you put in, usually 4.8Ghz will require 1.35-1.40vlts and a premium water cooler.
4.6Ghz is the sweet spot for these CPU's and I really wouldn't worry about going higher than that TBH, as the difference will be all but imperceptible in day to day use.
Man of Honour
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Got mine stable at 4.6Ghz with 1.255v vcore now. I have given up on anything higher as it look's like it will need a massive increase in volts just for a extra 100mhz. I am pretty disappointed to be honest as others with this batch have gotten 4.9Ghz with less than 1.4v. I am going to play with the cache now and see if I can get that to run 1:1 with the core. It's getting delidded as soon as I can borrow a delidding tool.
Cooler made no difference on mine temp wise until I delidded to be honest.
Well worth doing, I got a cheapish tool from ebay and it worked perfectly.
4.5Ghz is nice enjoy
Luck of draw I guess, but my i7 4790K isn't worth overclocking, 4.4Ghz to 4.8GHz requires a huge voltage increase and noise level go from silent to a noticeable. (annoying).
Great CPU, but if overclocking if your thing, it's probably not worth it.
Great CPU, but if overclocking if your thing, it's probably not worth it.
Just run at 4.4 mate, still a nice increase as it's on all cores.
I do mate.
Temp increase from 4.4GHz to 4.8GHz is stupid, 70C to 90C, clearly that's not worth it.
I do mate.
Temp increase from 4.4GHz to 4.8GHz is stupid, 70C to 90C, clearly that's not worth it.
Well worth doing, I got a cheapish tool from ebay and it worked perfectly.
4.5Ghz is nice enjoy
I've got mine at 4.6GHz with 1.25v. So I guess this is good right?
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What kind of temps do you get stressing with that? Sounds good for being on air! I can get 4.8 under custom water at 1.27v, stressing doesn't go past 62c To get to 4.9 I need 1.32v I think. Chickened out trying to get stable at 5 at about 1.39v (just wanted to see if it is possible). Might try delidding in a year's time like some others on here and see what I can do.
70 degrees was my max temp and was idling around 30 degrees. Still don't know if the temps are high or not :/
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I would be happy with that personally but wouldn't want to push higher until you get better cooling, others might have a different view.
Man of Honour
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That's near enough the same as mine (1.255v). Your temps are ok and I wouldn't start flapping until passing 80 degrees on air cooling. Obviously, less is better but yours is fine. At 4.6Ghz 1.255v mine is hitting 80 degrees under Linx stress testing which for my cooling setup is unacceptable so it's getting delidded. It's nowhere near that in normal use but it's still getting delidded.
Honestly? a 200MHz overclock is still pointless.
If the temps are good then great, but your never going to notice that improvement.
I will overclock to a higher frequency once get a water cooler. But because I never overclocked before It's a nice learning experience.
Not the best CPU for your first overclock, that's for the sure.
Compared to the good old days with the i7 920 which did 60%+ (2.6GHz to 4.4GHz+), the i7 4970K is a little pathetic in this regard.
But I guess that's what you get when you buy the highest clocked CPU for any given socket, there just isn't much headroom.
Good luck with your new cooler.
Man of Honour
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It's 400mhz actually. The max turbo of the 4790k is using all four cores is 4.2Ghz, 4.4Ghz is with a single core. Some motherboards have ways around this but that is outside the Intel spec. It is crap for overclocking though. in fact it's the worst overclocking cpu I have had since AMD's Athlon 64 days. I was hoping for significantly more as I have seen much higher clocks from the same batch as mine but mine seems to need a massive jump in voltage for anything higher and it's just not worth it.