SB Overclocking Thread

[scooterlibby]

Is anybody else getting significant temperature differences between cores at full load and idle? Think my HSF might be badly mounted, I'm at 4.5GHz with 1.38Vcore and getting 65-67C, 72-74C, 72-74C, 73-77C in Core Temp is that normal?

None of them are great temps anyway, I know. I should try dropping Vcore soon as it's 100% stable now, running BOINC and f@h 24/7 for ~3 days. PrimeGrid got it hotter than f@h, too (but I overclocked my GPUs at the same time).

Yeah I get crazy swings and I think it's due to a bad mount of the insufferable Zalman Performa. Gigantic pain in the ass to mount. My 2500k @4ghz gets up to the 70's when playing BC2, but otherwise hovers at the upper 20's low 30's at idle (down clocked to 1.6ghz). My voltage may also be to high at 1.32 (I set it lower than that but for some reason that's what comes on CPU-Z during load. I think some tweaking will bring it down, but those aren't life threatening load temps (I think).

 

[MrTransistorm]

I'm up and running @4.7GHz:



Vcore is 1.416V under load (set @1.385V in BIOS w/LLC Level 2). I've got PLL Overvoltage, Turbo, EIST, C1, and C states enabled.

I could probably up my multiplier at this voltage, but my temps are reaching mid 70s under load (Prime95 Blend). Either I need to reseat my HR-02, or that's the best it can do. I plan on watercooling in the future, but this will do for now.

I originally had a 140mm X-Silent fan on the HR-02, but I needed a more powerful fan. It took some jury rigging, but I managed to attach an old 120x38mm NMB Smart Fan on there. I wired a pot in parallel with the thermistor so that I could control the speed.




I'm going to try playing around with DVID (Gigabyte's auto Vcore w/adjustable offset). Perhaps I'll be able to achieve a lower Vcore under load and thus lower temps.

There are some quirky behaviors with the F7f BIOS, but it's working pretty well for the most part. Hopefully things will get ironed out over the next couple of months.

 

[scooterlibby]

Yeah I get crazy swings and I think it's due to a bad mount of the insufferable Zalman Performa. Gigantic pain in the ass to mount. My 2500k @4ghz gets up to the 70's when playing BC2, but otherwise hovers at the upper 20's low 30's at idle (down clocked to 1.6ghz). My voltage may also be to high at 1.32 (I set it lower than that but for some reason that's what comes on CPU-Z during load. I think some tweaking will bring it down, but those aren't life threatening load temps (I think).

OK I figured out my BIOS was being quirky and resetting my voltage to 'Auto' and setting the voltage way too high based on my multiplier, but somehow I managed to fix it and have my OC with 1.25v @4.4ghz and temps in the high 60's under load now. Definitely fine for me.

 

[Peter Trend]

OK I figured out my BIOS was being quirky and resetting my voltage to 'Auto' and setting the voltage way too high based on my multiplier, but somehow I managed to fix it and have my OC with 1.25v @4.4ghz and temps in the high 60's under load now. Definitely fine for me.

Glad you got it figured out! :thumbsup:

 

[gregoryvg]

Woot! Just finished my SB build and all the troubleshooting that came along with it. Was more to it than I was hoping for, but finally all up and running. I have an ASUS P8P67 MB and did the auto-overclock thing and it was quite impressive (to me at least), my i5 2500k according to CPU-Z: 4.327Ghz and my memory is running at 1650Mhz. I might bump down the memory speed back to 1600mhz (if I can figure out how) and tighten up the memory timings a bit (currently at 9-9-924) if I can figure out how to do that as well.

This is on air; I actually bought a Rocketfish CPU cooler at Best Buy and it's a nice little cooler (bigger than the stock HSF and yet smaller than the huge Antec one they had there, and it fits in my case). Been running Prim 95 for about the last 10 minutes and so far my CPU temp is up to 70c, is that okay?

Edit: Looks like voltage is at 1.3 - good/bad?

 

[mosco]

Gigabyte GA-P67-UD3, F6 Bios
Intel i5-2500k
xigmatek hdt-s1283

I had a lot of trouble overclocking at first, but after a bunch of reading and updating to the F6 bios, that seems to have helped. I didn't know what Load Line Calibration was, nor did I know you could set the voltage to normal and the Dynamic vCore to Auto.

Voltage changed from Auto to Normal
Load Line Calibration turned On
Dynamic Vcore set to Auto
Turbo enabled, and set to 44 for each core usage
All other settings on Auto

20 runs of Intel Burn Test 2.5 and no crashes/freezes. Temps get up to about 59C and the highest the vcore goes is about 1.32 but it seems to stabilize at 1.28.

Going to do some more testing but this seems to be much more stable than before.

Is there any advantage to setting the memory multiplier to 16 if I have 1600 rated memory?

 

[Hogan773]

Woot! Just finished my SB build and all the troubleshooting that came along with it. Was more to it than I was hoping for, but finally all up and running. I have an ASUS P8P67 MB and did the auto-overclock thing and it was quite impressive (to me at least), my i5 2500k according to CPU-Z: 4.327Ghz and my memory is running at 1650Mhz. I might bump down the memory speed back to 1600mhz (if I can figure out how) and tighten up the memory timings a bit (currently at 9-9-924) if I can figure out how to do that as well.

This is on air; I actually bought a Rocketfish CPU cooler at Best Buy and it's a nice little cooler (bigger than the stock HSF and yet smaller than the huge Antec one they had there, and it fits in my case). Been running Prim 95 for about the last 10 minutes and so far my CPU temp is up to 70c, is that okay?

Edit: Looks like voltage is at 1.3 - good/bad?

I'm testing a 44x run using CPU offset voltage of -.005 which is giving me around 1.26V and temps are hovering between 57C and 62C, for a point of comparison. I have the Hyper 212+ cooler - I love this cooler for $15 after rebate! So far its run for 1 hr on Prime.

I tried same voltages at 45x multiplier and it BSODed after about 10 mins in Prime.

I also read several places that you can trim down CPU PLL voltage a little and it doesn't hurt anything - I trimmed mine down to 1.79 and might trim it to 1.76 in a later test once I've found a good compromise for voltage and speed.

I'd like to get something at 45 or 46 but if it comes with a lot more voltage, then I wouldn't stay there. To me its not worth running 1.35V, for example, if I could run 1.25V and the multiplier is only 1 or 2 lower. No way I'm really gonna notice difference between 44x and 45 or 46. I may even head down to a 42x and then see HOW LOW I can get on Vcore for a 24/7 OC that I don't have to lose sleep over. If I could run 42x at 1.18 or something, I'd probably even do that. 1.18 is what my mobo runs stock....so then I wouldn't feel like I'm stressing my chip at all!

 

[Dadofamunky]

Woot! Just finished my SB build and all the troubleshooting that came along with it. Was more to it than I was hoping for, but finally all up and running. I have an ASUS P8P67 MB and did the auto-overclock thing and it was quite impressive (to me at least), my i5 2500k according to CPU-Z: 4.327Ghz and my memory is running at 1650Mhz. I might bump down the memory speed back to 1600mhz (if I can figure out how) and tighten up the memory timings a bit (currently at 9-9-924) if I can figure out how to do that as well.

This is on air; I actually bought a Rocketfish CPU cooler at Best Buy and it's a nice little cooler (bigger than the stock HSF and yet smaller than the huge Antec one they had there, and it fits in my case). Been running Prim 95 for about the last 10 minutes and so far my CPU temp is up to 70c, is that okay?

Edit: Looks like voltage is at 1.3 - good/bad?

Nope, temps and volts are in the ballpark. You could go higher.

 

[ensign_lee]

Is my CPU-Z lying to me? It says that my core voltage is at 1.068V while running at 4.4 Ghz.

Surely that's low? All I did in the BIOS for my Gigabyte UD3 board was change the multiplier to 44 and I'm worried that the auto-voltage will start overvolting my CPU.

 

[MrTransistorm]

Is my CPU-Z lying to me? It says that my core voltage is at 1.068V while running at 4.4 Ghz.

Surely that's low? All I did in the BIOS for my Gigabyte UD3 board was change the multiplier to 44 and I'm worried that the auto-voltage will start overvolting my CPU.

You need a newer version of CPU-Z. Version 1.56.4 is the latest beta, and it can be found here.

 

[ensign_lee]

Awesome, thank you! 1.26V makes MUCH more sense.

Aaand, in the interests of contributing to this thread:

i5-2500k
4.4 Ghz
Gigabyte P67A-UD3

Using the Coolermaster 212 aftermarket cooler - I run at room temperature pretty much at idle (20's) and under a 100% load from Prime95 or SETI@home, get to 50-53 degrees on 3 of my cores. For some reason, my first core is always about 8-9 degrees cooler than the other ...but I guess I shouldn't complain lol.

So far, Prime's been running stable for 12 hours. Going to let it run for another 12-24. Don't know if I'm actually going to try to push it much past 4.4, so if this is stable, woohoo.

 

[Hogan773]

My temps experience is similar, although I think I'm a few degrees higher. I do find that Core 0 is often as much as 10 degrees cooler than the others....not sure if that's true or whether the sensor in that core is just off.....

 

[Dadofamunky]

My temps experience is similar, although I think I'm a few degrees higher. I do find that Core 0 is often as much as 10 degrees cooler than the others....not sure if that's true or whether the sensor in that core is just off.....

Same exact thing happens to me! Weird. Others have mentioned this. I keep thinking I botched my HSF install.

 

[Diogenes2]

For me, cores 1 & 2 about 10 degrees hotter than 0 & 3 at full load .. Not so much at idle.

Must be the way the silicon is laid out ...

 

[Dadofamunky]

Yeah I get crazy swings and I think it's due to a bad mount of the insufferable Zalman Performa. Gigantic pain in the ass to mount. My 2500k @4ghz gets up to the 70's when playing BC2, but otherwise hovers at the upper 20's low 30's at idle (down clocked to 1.6ghz). My voltage may also be to high at 1.32 (I set it lower than that but for some reason that's what comes on CPU-Z during load. I think some tweaking will bring it down, but those aren't life threatening load temps (I think).

I had one of those too - they are complete garbage - and overpriced garbage to boot. (Forget having more than 2 sticks of RAM with that thing!) The Hyper 212+ is easier to work with and hence more effective. Your voltage is just fine, you could go a bit higher. My temps are exactly the same as yours - load temps are a bit higher when I run stress testing; otherwise nothing I do even remotely challenges it. Your temps indicate that your HSF is at least properly seated.

 

[The Green Bean]

I think I have a crappy chip. It crashes at 1.325v @ 4.3 even when the temps are under 65. CPU-Z shows a lesser voltage though. Something like 1.275. I just assembled the rig so I'm kinda new with this.

I think I know what's going on. Whatever voltage I set, it reverts back to 1.25 under load. It goes back up when not under load. I'm using an Asus P67 Sabertooth. Suggestions?

 

[Diogenes2]

Which motherboard ?

What about RAM settings ?

 

[The Green Bean]

Which motherboard ?

What about RAM settings ?

Asus P67 Sabertooth.
Ram settings are at auto.

The problem seems to be with the voltage as I've edited in my previous post.

Okay... Manual settings seem to have this problem. So I tried "offset" settings to adjust the max voltage to 0.024v over the maximum. So far so stable @ 4.4... Shows 1.325 in cpuz.

 

[AdamK47]

Load Line Calibration

 

[BlackBabyJesus]

What apps do you guys use for monitoring CPU temps, core loads, stress testing etc?

edit: vvv Thanks Diogenes2!

 

[Diogenes2]

http://www.cpuid.com/softwares.html

 

[The Green Bean]

Load Line Calibration

???

 

[Diogenes2]

Bump !

OK - Where are those SB overclocks ?

 

[Arcadio]

I'm using a 2600k with an Asus P8P67 Deluxe motherboard. I increased the CPU ratio to x45 by using the Asus software, but every time I reboot the computer, the default ratio is restored.. does anyone know where in the BIOS do I make the CPU ratio permanent? I'm using the latest BIOS...

 

[aigomorla]

my 2600k is currently the 1 out of 3 systems in my entire farm which isnt overclocked.

So HA! FEAR my 2600k!!

???

LLC or load line calibration, aka Vdroop control minimizes the voltage drop the cpu does during load. Its nice when your working with voltage range in the stock -> 1.4 ranges... after that, it can be dangerous because of a momentary voltage spike that happens right b4 the vdroop kicks in.

What apps do you guys use for monitoring CPU temps, core loads, stress testing etc?

edit: vvv Thanks Diogenes2!

HWmonitor for a big list of everything my system has for cpuid values.

(Yes these values are under water)

Realtemp, to solo on CPU Values.

Intel LinX for quick testing on cpu end.
(mah.. wont link this one.. as its easy to find)

Heaven GPU Benchmark on Loop, for GPU end tests.