3770k overclock sound right?

[Evilviking]

Long time viewer, first time poster.

I just built a 3770k rig and have it overclocked. All I did was keep the power saving feature on set my voltage to "offset" .005+ turbo to .004+ and my multiplier to 45 x 100. Medium/ high LLC. Ran Prime95 for 2 hours no issues and temps only went up to 89c on the hottest core. Speedfan and Cpu z never showed my voltage go past 1.28v Something to me doesn't sound right. Am I missing something? Or is this normal and am I good?

Rest specs :
3770k HT ON
Asrock z77 professional m
G. Skill ripjaws ddr3 1600 1.5v
Crucial m4
Seasonic x750
Gtx 580
Corsair h80
Corsair 350D

 

[cmdrdredd]

89c is pretty hot. Can you try turning llc to a lower notch and see if it's stable there? It may be spiking voltage.

 

[Evilviking]

Will try that. It's also over 80f in the room. Summer time in so cal

 

[cmdrdredd]

Yeah I'm in South FL and right now it's about 80F in the room but I'm idle at 35c and hover around 80c at load on a Noctua NH-D14

 

[Evilviking]

Also. 89c was peak. It hovers around 82 / 86c
Ok, I idle around 39. Will try a lower LLC

 

[cmdrdredd]

Then that's not too terrible. You are using a Hyperthreading CPU which will heat up more than a standard quad like mine.

 

[Evilviking]

If my temps are ~ok, I guess I was just shocked how easy it was to overclock. I'm coming from a i5 750 @ 4ghz and it was a pita to get it fine tuned.

I'm happy with 4.5 should I stick with an offset overclock?

 

[cmdrdredd]

Yeah I use offset. I turn LLC off though and find the offset that works for 4.5Ghz which for my cpu is 1.28v at load.

Just be sure it's stable. 12 hours prime, no WHEA errors.

 

[Concillian]

4.5 is not bad. My preference is to turn it down 100-200 MHz once I find a stable point to add some margin for potential degradation, dust buildup, etc... It means I don't have to worry about an overclock causing blue screens, since test programs don't test every possible loading scenario.

So for my wife's 3570k, I used 4.3 GHz and a more moderate voltage than you're using (I think 1.20) and then I turned it down to 4.1 as a final OC. This way I don't have to dick around with her machine failing at some point in time when I'd rather be playing my computer or watching sports or working on my car...

 

[guskline]

Great OC though your temps are a bit high for me. I run at 4.4Ghz. $.5 is stable running Intel Utility testing stability but the temps are a bit high for my liking. I found 4.4Ghz to be my sweet spot.

 

[blackened23]

89C sounds normal for 1.28V during extreme stress testing. Although you should be fine as-is, i'd personally i'd aim for a lower vcore if possible, that should lower your temps by an appreciable amount. There isn't necessarily anything wrong with your current temp, though, you will never approach similar temperatures during regular use. In fact, i'd be surprised if you ever pass 65-70C during regular use - you should be fine.

 

[guskline]

blackened23 you must have some real good silicon to run at 4.7Ghz. What are you using for a cooler?

 

[Yuriman]

On my ASRock, the LLC implementation is pretty bad. I found I had instability at partial load and idle. You might try disabling it and seeing how long you can get stable.

 

[blackened23]

blackened23 you must have some real good silicon to run at 4.7Ghz. What are you using for a cooler?

Just the original H100 in a cosmos II case. Nothing super fancy. I've gotten higher clockspeeds but felt like the vcore required - 1.3V IIRC - was a bit excessive.

Oh. For 4.7ghz it is usually around 1.26V (i'm using offset voltage) but it has crept a bit higher to 1.27V than that at times. I'm using +.020 offset in the BIOS - although that probably isn't super useful since it tends to vary between motherboards. I'll say one thing...dialing in an offset voltage is a complete pain in the neck. I was tempted to just go with a manual voltage, but decided against it since that would just increase my idle temperatures (not what I want).

 

[blackened23]

On my ASRock, the LLC implementation is pretty bad. I found I had instability at partial load and idle. You might try disabling it and seeing how long you can get stable.

LLC is very, very tough to dial in and usually takes a couple of hours of experimentation. I believe that applies to all motherboards, although i'm not sure if ASrock has something different going on.

The thing with offset voltage, is that you can manipulate it to give the proper voltage at load -- but then in some cases the voltage will get TOO low at idle which can result in a BSOD. This was my issue when I spent several hours trying to dial my offset in. It was a complete annoyance to say the least. Many, many reboots. :| On an unrelated note, the adaptive voltage feature with Haswell seems to make this much easier -- you can specify the target voltage and the iVR takes care of the rest; the only downside with Haswell's IVR is that it tends to over-shoot the voltage target when doing any type of stress testing with AVX instructions (eg prime95). So a lot of folks are finding their prime95 temperatures to be insane with the haswell, although they won't necessarily get anywhere near that during normal use.