Just got my 4690K

[buklau]

Just got my 4690k yesterday, installed it into my Asrock Z97 Extreme4 board. Got it boot at 4.6ghz @ 1.25v into windows, crashed in prime95 within 10 seconds. Boost the vcore to 1.3v, CPU overheats to 100c+, auto shut down, very disappointed with the results. Right now I settled with 4.5ghz at 1.215v (prime95 @ 85c) until I find a way to fix the overheating problem :thumbsdown:. I should of stayed with my old 2500k instead, ran stable at 4.5ghz at 1.328v <65C in prime95. The only good thing about this new 4690k CPU was I can run my 30nm samsung 4x4gb ddr3-1600 ram at 2200mhz 1.585v 10-10-10-30 2T mode. Tried 2400mhz 12-12-12-36 @ 1.6v and no go. :thumbsdown: Any ram voltage higher than 1.6v the system will refuse to boot. :thumbsdown:

 

[Puppies04]

That CPU should throttle not shut down.

Also why are you overclocking your ram, makes almost no difference to most tasks.

 

[Galatian]

I have figured you can severely reduce the input voltage (not vcore) on the new devil canyon and still be stable. I could run on 1,5 V (standard is like 1,8V). Haswell needs a lot of fine grained tweaking.

 

[WhoBeDaPlaya]

Don't you want to keep Vin around 0.4V higher than Vcore for stability?
I've run into chips that would not be stable no matter how much Vcore I threw at them, but raise Vin and presto!

 

[wilds]

I'm still trying to find the sweet spot with mine. But I notice a large temperature spike above ~1.29v. I might end up at 4.4 GHz for 1-3 cores and 4.5 Ghz for 1 core at around 1.27v.

I'm using an EVO 212, nothing fancy.

Edit: Peaking at 1.223v

45x for all cores. In synthetic benchmarks, cpu cores are pretty hot! Not going to be a problem though.

 

[wilds]

Spent a few hours last night testing a little more. I am now at 4.6 GHz at 1.32v. I was surprised at the massive voltage spike required to get 4.6 stable.

4.7 and 4.8 GHz require too much voltage and the 212 EVO isn't designed for that.

After a few minutes of LinX, I will see occasional frequency dips as cores pass 100c. On other synthetic benchmarks, temperatures are not rising as severely and I am getting excellent scaling. I am going to try to lower my voltages some more, but I don't think I can go much lower :/

 

[ctk1981]

There's something different going on with Z97 and it isn't just that asus board - i've seen it mentioned across various reviews of different Z97 boards. The voltage threshold is higher. BUT, the weird thing is, the maximum overclock is generally no different between Z87 and Z97. I really don't know how to explain it and I haven't seen an explanation anywhere. You would normally think a higher voltage threshold means a higher overclock. But for some reason, it doesn't. It does mean you can kick a 4770k up to 1.35V+ without issue (using aftermarket cooling) on a Z97, but that definitely WAS NOT the case on Z87. Z87 had a preferred range of 1.2V-1.25V if using an aftermarket cooler (1.2V) or a closed loop like the H100 (a little higher, 1.25V ).

I think anyone buying a new system would get Z97 anyway, but it would be interesting if anyone could investigate and explain the voltage threshold differences between the two chipsets. I really can't think of an explanation since it seemingly happens on all Z97 boards. I don't know if Z97 measures voltage differently or what....pretty strange.

From the "wheres anandtechs devil canyon review". Wasn't aware of this myself, might be worth looking into.

My only fear I have with the 4690K and Z97 I bought is the motherboard bios may not be new enough to fire up the machine. So I went ahead and ordered the cheapest 1150 processor I could find just in case so I can flash the bios.