Haswell MAX clock speed + voltage + cooling thread.

[wazza300]

whats safe limit of vcore on haswell ? id be happy with under 1.4v tbh just push vcore a bit more

 

[arknor]

whats safe limit of vcore on haswell ? id be happy with under 1.4v tbh just push vcore a bit more

I think 1.35 is about the max before heat is massive and throttling starts

 

[smilertoo]

Whats the safe max temp for the motherboard? or is it safe to assume anyone using a good air cpu cooler will be fine for the motherboard.

 

[Wucked]

Usurped

CPU: 4770K C0
Cooler: H100i push only
Case: HAF X
Mobo: Gigabyte OC
TIM: Arctic Silver

4.4Ghz 1.14V 65°C
4.5Ghz 1.2V 70°C
4.6Ghz 1.272 78°C
4.7Ghz 1.332 90°C

All prime stable. Delid soon with more results...

 

[smilertoo]

Pretty big jumps in vcore once youre over 4.4ghz
Ive noticed if i render with only cpu, it round robins the core being used to stop one becoming too hot...runs much cooler than expected.

 

[vapor matt]

shadow_boxer

Not fully stress tested or overclocked but just done the quick screening and continued to up the multiplier. 5 mins in AIDA64.

looks like a sweet chip that one!

all updated to 2nd post, also guys can you copy the layout fill in the gaps so to make it easy updating the list! cheers!

 

[smilertoo]

Strange thing, AIDA and OCCT passed my 4.3ghz at Vcore 1.19 and temps all around 82c, but it gave me a WHEA bluescreen when actually rendering.
4.3ghz at vcore 1.2 was stable at rendering with temps only 66c.

 

[shadow_boxer]

Strange thing, AIDA and OCCT passed my 4.3ghz at Vcore 1.19 and temps all around 82c, but it gave me a WHEA bluescreen when actually rendering.
4.3ghz at vcore 1.2 was stable at rendering with temps only 66c.

I had the same thing yesterday. Ran AIDA64 for 30mins with no problem but ran Cinebench 11.5 and it crashed (superpi 32M was fine too). This was 4.8GHz at 1.26V. I think ADIA64 seems rubbish at stress testing (despite what Asus stated) so going back to prime95 myself...more testing tonight!

 

[sadbuttrue]

Passing a stress test does not mean a stable PC. Crashes and errors invariably occur during a load/voltage change. This happens in normal use or benchmarks with varied load. Stress tests put a constant fixed load on the cpu and only proves that your cpu has enough volts at full load. More is usually needed to account for voltage spikes that aren't registered by monitoring software. These spikes become larger with increased levels of LLC.

 

[smilertoo]

I seem stable at 4.3ghz and 1.2v, i'll stick with this...until OC offer a relid service.

 

[TNA]

I had the same thing yesterday. Ran AIDA64 for 30mins with no problem but ran Cinebench 11.5 and it crashed (superpi 32M was fine too). This was 4.8GHz at 1.26V. I think ADIA64 seems rubbish at stress testing (despite what Asus stated) so going back to prime95 myself...more testing tonight!

Same thing happened to Kyle at HardOCP. He passed ADIA64 fine at 4.8GHz or 5Ghz I think it was and then crashed on CineBench.

Anyway, just up it to 1.275 or even 1.3 and see if that fixes it.

 

[Buckster]

Handbrake was hardest for me to get stable on my 3770k

(go latest nightly to ensure uses AVX)