4790K overclocking (H105)

[ebilcake]

Just put together another system this time with 4790K and Asus maximus vii hero.

All good so far, seem to be hitting the wall at 4.8GHz with 1.425V with temps hitting 85C, hits OCCT's default 85C limit after about 40 minutes and stops the test.

Does sound about right?

Also, can anyone recommend some replacement fans for the H105 as the stock fans are bit loud under full load.

H105 pump also is a little noisy but that seems to normal from the Corsair AIO coolers I've tested.

 

[Qitarah]

1.425 is too much juice flowing through the processor. Bring it down, a lot.

Stock fans will be noisy at full load because it's probably at like 2300 RPM where any fan would be noisy. Set a custom fan profile and find where the fans best speed vs performance lies. under most situations my fans don't go about 700RPM.

 

[ebilcake]

1.425 is too much juice flowing through the processor. Bring it down, a lot.

Stock fans will be noisy at full load because it's probably at like 2300 RPM where any fan would be noisy. Set a custom fan profile and find where the fans best speed vs performance lies. under most situations my fans don't go about 700RPM.

It's not stable at 4.8GHz at any less than 1.425MHz so it's not possible to bring it down.

4.7GHz takes a little less voltage obviously (1.350V I think) and runs a fair bit cooler so that will probably be my 24/7 speed.

CPU would overheat pretty quickly under load if the fans never went above 700rpm.

 

[VincentHanna]

I agree, too much voltage.

What do you need 4.8Ghz for exactly? I'd knock it down to 4.5/4.6 and be done with it. 90% of games are invariably GPU not CPU limited.

My 4770k can do 4.6Ghz on 1.216 volts

 

[ebilcake]

I agree, too much voltage.

What do you need 4.8Ghz for exactly? I'd knock it down to 4.5/4.6 and be done with it. 90% of games are invariably GPU not CPU limited.

My 4770k can do 4.6Ghz on 1.216 volts

Not bothered about voltage or what is considered safe, more concerned about temperatures and noise.

My 4790k needs more than 1.216V for 4.6GHz (1.275V)

Fan recommendations? something around 1600-1800rpm but fairly quiet.

 

[Qitarah]

Don't go above 1.35v. Even at that voltage i would not consider it for 24/7.

Try stick at or under 1.3 for 24/7 use. Specific limited benchmark runs can be higher.

As for rpm of fans, that is in day to day use. You will never ever see the likes of stress occt can bring about in games/every day use. Find out what your temperatures are like in your normal day to day usage of your pc, set a custom fan profile accordingly. for benchmarking runs you just put fans on 100% for the duration anyways.

are you using software to overclock and not bios by any chance?

As for fans to replace? Noctuas are always a good option.

 

[ebilcake]

Don't go above 1.35v. Even at that voltage i would not consider it for 24/7.

Try stick at or under 1.3 for 24/7 use. Specific limited benchmark runs can be higher.

As for rpm of fans, that is in day to day use. You will never ever see the likes of stress occt can bring about in games/every day use. Find out what your temperatures are like in your normal day to day usage of your pc, set a custom fan profile accordingly. for benchmarking runs you just put fans on 100% for the duration anyways.

are you using software to overclock and not bios by any chance?

As for fans to replace? Noctuas are always a good option.

I don't see why not, the temps are fine at 1.375V, that's the whole point of buying a decent cooler. Using bios, never been comfortable using software to overclock.

Will take a look at those fans, thanks.

I've never set fans to 100% for benchmarking, seems dishonest and a little pointless.

 

[r7slayer]

I don't see why not, the temps are fine at 1.375V, that's the whole point of buying a decent cooler. Using bios, never been comfortable using software to overclock.

Will take a look at those fans, thanks.

I've never set fans to 100% for benchmarking, seems dishonest and a little pointless.

It's not temps you need to worry about really its the volts. CPU can handle high temps cant handle high volts. It degrades and possibly damages the cpu with high volts. 1.35 as stated is found to be the highest on average you can go without damaging the cpu and doesn't degrade the cpu noticeably.

 

[ebilcake]

It's not temps you need to worry about really its the volts. CPU can handle high temps cant handle high volts. It degrades and possibly damages the cpu with high volts. 1.35 as stated is found to be the highest on average you can go without damaging the cpu and doesn't degrade the cpu noticeably.

I've never really bought into that, so long as temps are fine it shouldn't be an issue.

My old i7 920 was running at 4.2GHz with 1.425V for 5 years and everyone said that was too high.

 

[Qitarah]

Each chip is different. Just because a chip from 2010 could run at that volt for years doesn't mean it's a good or safe idea to run the 4790k at it now.

My i7 950 degraded from 1.35v bench runs towards the end of its life and I'm pretty sure 1.425 is enough to do damage to a haswell.

Anyways it's your processor, your system and your money. If you're happy running it at that and know the potential downsides then that's cool.

As for the original question about fans. Doubt you will get anything that much less noisy. Only reason the low rpm fans are less noisy is because of...the low rpm. As I said above, set a fan profile up see if they are still too noisy. Although Some corsair fans (my h100i fans) have a whirling sound at certain rpm ranges but you just seem to be pointing to the fact they are going full tilt which a fan profile will solve.

 

[setter]

Even with watercooling high voltage of 1.400 will be a bit high. Have you tried lower vcore and higher VCCIN, (input voltage)?