Questions about changing 4700 to 4770k

[Maximilian]

I knew this was going to bug me, so I went down to MicroCenter in Boston, picked up a 4770k, and swapped it in. Being the impatient fellow, I immediately set it to a multiplier of 45 on all cores and set the core voltage to 1.25V. I know that's not how you're supposed to do it, but my system seems stable so far and I just got the best 3DMark Fire Strike score I've ever gotten by a long shot.

Now to figure out if my temps are acceptable and see if this baby is really stable. I know my cooler is a budget model, and I'm definitely up for replacing it at some point soon.



Those have been overclocked from day one and are stable and cool (enough) at 1200 core 1600 memory.

:thumbsup:

Thats what I do, if I know it'll bug me I buy it.

 

[amin74]

haswell is not the free lunch we used to enjoy, it's hard to overclock even if you bother to delid and the performance increase is not ground breaking. (4.5-4.3ghz vs 3.9ghz)

For what it's worth, my new 4770k seems stable and cool at 4.5GHz without delidding, just using the Hyper 212 Evo and CPU fan set to "Turbo" mode in the Asus BIOS. Whether gaming or running Prime95, I'm not seeing any CPU temps over 81 degrees Celsius so far with the core at 1.25V.

Update: I think I must have gotten a "good" one because everything I've tried so far has been stable. Currently backed off to 4.4GHz with core at 1.2V - stable with all core temps at 71 degrees or lower under full load.

 

[Pseudoics]

OP you mentioned 'video conversion' so I would suggest using Handbrake or your preferred encoding program that uses AVX2 instructions. This will give it a good real world stability test using Haswell's voltage-increasing instructions, without beating the hell out of it unrealistically as in pure AVX2 burn tests (which will shy you away from higher clocks).

My 4770k was issue-free stable with 4.7Ghz @ 1.24v in my use for weeks until I started encoding with Handbrake, where it would reset during an encode here and there. Bumping core and input voltage slightly has me comfortably "stable" again and at max-temps I am happy with (~83C, Noctua NH-U14S).

 

[amin74]

Thanks, Pseudoics. What I meant by video conversion was mainly family video exported to H.264 MP4 in Adobe Premiere Pro. An hour of footage can take several hours to process. Would that be a suitable test?