CPU Overclock List & Discussion Thread

[rohit32407]

System specs are in signature.
4.2 GHz OC with -.050 offset and LLC to auto. Din't touch any other voltages. Just changed the phase control and duty cycle settings to extreme. Vcore under full load with prime95 stays at 1.230v. At idle it drops down to around .9v . Do I need to keep an eye on individual cores VID voltage also or just the Vcore? I am using HWiNFO to monitor.

Just done IBT high stress 20 cycles test. No issues till now. Prime95 Blend test running at the moment. If I am stable for lets say 3-4 hours then I will aim for 4.3. I just want to reach as high as possible without manually messing up with voltages.

[sharang.d]

^You don't need to change voltage for such a low OC anyway.

[rohit32407]

^^ I had to change it coz on everything to auto vcore was going around 1.290-1.3v which i thought was way too high for this kind of OC so played around with offset settings..

[sharang.d]

I have the same 4.2 OC and I get 1.3 VCore as well on everything auto. I don't think auto settings would let it go to the higher side. Let's wait for someone else's input though

[topgear]

^^

I don't think auto settings would let it go to the higher side

if you are talking about the cpu speed well you can go higher even with auto setting - the vcore will be increased with cpu speed increment ( upto a limit depends on mobo model and bios though ) so it's better to play manually with cpu vcore setting to find the optimum cpu vcore for a specific cpu speed.

[rohit32407]

I have the same 4.2 OC and I get 1.3 VCore as well on everything auto. I don't think auto settings would let it go to the higher side. Let's wait for someone else's input though

This is what was happening with me. 1.3v for 4.2 was way too high IMO. So I played with offset settings. Now when my CPU is under 100 percent load LLC kicks in and vcore stays around 1.224 and when on idle its around .912. Although I think because of this Idle vcore my system is showing symptoms of instability. There is no problem in 100% load condition but when you are doing menial tasks then this can trigger a crash. no BSODs yet but I think its gonna happen soon. I am gonna try 1.23 manual vcore and LLC to auto and see what happens.

[sharang.d]

I've been running 4.2ghz for a month now with auto vcore. No BSODs.
I trust my asus

[sumonpathak]

try 1.26V with llc extreme/high...

[rohit32407]

I've been running 4.2ghz for a month now with auto vcore. No BSODs.
I trust my asus

at 4.2 with everything on auto BSOD was never a problem. The problem was high vcore when it wasnt required for such low OC. Thats why i changed vcore manually. When I tried -.050 offset with everything else on auto stress testing went fine bt menial tasks like browsing etc were showing symptoms of a crash(mouse starts to lag etc etc. No BSOD yet). So i have manually changed vcore to 1.23 and LLC to auto. Its stable till now. Blend test has been running for 2 hrs and no errors yet. IBT high stress test also went fine. Lets see what happens. If this goes fine then i may try for higher clocks(4.4-4.5)

[sharang.d]

^By BSOD i meant including all other kinds of problems. I mean even when CPU is on full load @ 4.2 + auto vcore I don't get any of the symptoms you mentioned.. so I didn't manually change vcore.
Maybe it has got something to do with the rest of our hardware?

[rohit32407]

^^ possibly yes plus different chips behave differently. Whats your vcore under full load? But i have to agree with you on one point that asus really has optimised all the auto settings brilliantly.

[sharang.d]

^1.334V max when running prime95

[rohit32407]

^^ thats pretty high I think for 4.2 OC. You can goto 4.4-4.5 with that much vcore(maybe even more if you have a good chip). Same was happening with me. My vcore on everything on auto was going around 1.3v thats why I set it manually and its stable. helped me to get my temps down as well. Now with prime95 running vcore stays at 1.2 max.

[sharang.d]

^What max CPU temp are you gettin with ur setup during prime95 Blend test?

[rohit32407]

^^ Hottest core=58-59
coolest core=52(core 0 or 1st core)
core package= 57-58
cpu tcase temp= 46
Ambient temperature here is 28-30
These temps are after 1.5 hrs of prime95 blend test.
Add 5-8 degrees more for IBT testing.

[sharang.d]

^Those are really good temps for 4.2
What's your ambient temp?

[rohit32407]

^^ As mentioned above 28-30 degrees. Whats your core temps at max load? Also mention the ambient temperature please.

[sharang.d]

30C ambient
65C Max temp on prime95
I should try lowering Vcore like you did to get lower temp but the thing is that CPU is never on full load so im not really worried about the temp @ 4.2GHz
What's your idle temp?

[rohit32407]

^If 65C is the core temp and not the cpu tcase temp then I think you don't need to do anything but yes lowering vcore will surely help with temps.

Well idle temps are whole other story. 2 cores stay at 42 while the other two stay around 33-35. At first i thought i have made some mistake in either installing HSF or applying TIM. So I redid all of that 3 times and still the same result. But since load temps were perfectly fine so I don't care about idle temps much. Cpu Tcase idle temp is around 32 if ambient is 26-28 and 34-35 if ambient is around 28-30.

[sharang.d]

I just wanted to know performance of your Cooler so asked about your CPU idle temp
Also where to view CPU tcase temp? The one we see in ASUS Suite?

My idle never goes beyond 40
Hovers around 35 most of the time..

[rohit32407]

yes thats the one or the one you see in HWiNFO under nuvoton section. Will try 4.5 tomorrow then it will be a real test for this cooler as vcore will surely go beyond 1.3

[sharang.d]

Okay thanks.
Ran prime95 Blend test for 36mins.
Max values recorded:
Cpu tcase -> 51C
Max core -> 71C
Vcore -> 1.344

Are these values okay?

[tkin]

Everything is ok as long as its below 75c, period. And 80 would be danger line, 85 is max limit for insane ocs.

[rohit32407]

Okay thanks.
Ran prime95 Blend test for 36mins.
Max values recorded:
Cpu tcase -> 51C
Max core -> 71C
Vcore -> 1.344

Are these values okay?

For that vcore and hyper 212 evo I think you are fine there
I don't know why but Intel recommends to monitor tcase temp and to keep it below 72.6 degrees max for i5 2500k. But if the core is getting hot beyond its limit then what good is tcase even if its below the max limit? I don't understand the logic behind their this particular recommendation.

[topgear]

^^ even I don't and Intel has no interest in publicly reveal it's cpu's core temp and same goes for AMD as well - why not cpu manufacturers are interested in specify tjmax ( cpu core ) temp is a great mystery to me and it's really a PITA to find the accurate tjmax temp of a cpu.

[sharang.d]

How's this?

Spoiler:

[rohit32407]

^^ Just about perfect . You can still lower your vcore but your temps are great for your cooler and that vcore

[sharang.d]

The thing is that I have decided I will never touch any kind of voltage option before buying the PC and I'm definitely gonna follow it
So yeah this is my final OC. Won't OC the CPU any more. Working on RAM OC now *devil*

Also you are right the kind of cooling my Hyper 212 EVO gives is really good. Didn't even buy an extra fan. Just with the single stock fan
Maybe its the overall effect of the ventilation inside the cabinet.
I have the members here to thank for that of course. Corsair 400R and especially the Silverstone air penetrator 120mm are doing their job wonderfully

[rohit32407]

^ yes I think your cabinet is definetly helping alot. In my cabinet everything is looking too cramped. As if everything has been just squeezed. Will think about going for a better cabinet in a month or two maybe. My front intake fan only cools down HDDs. I don't think even a bit of air from it comes to the actual area of all vital components. Ordered this fan from flipkart Cooler Master 90 CFM LED Cooler | Cooler | Flipkart.com . Got it yesterday but the screws provided withit just don't fit into the holes provided on the fan. I guess i will have to get it replaced or look for screws that do fit into it.

[ithehappy]

Guys I have some free time over the next few days and I wanna OC my CPU manually this time. I have already OC'ed (haven't applied the settings however) from my BIOS up to 3.7 GHz rock stable, with the lowest voltage and other modified settings. But I wanna OC it further, maybe 4.0 GHz if it's possible with my basic Hyper 212+. So firstly what software should I use? And as far as I remember I used Prime95 tests to check temp and stability, shall I keep using that or a better app is preferred? I will at first apply the settings of my 3.7 GHz OC and then tweak from there as needed.

Thanks in adv.