Help me OC an i5 760!

[Razor-BladE]

As from this thread:
http://forums.overclockers.co.uk/showthread.php?t=18265076

I recently moved my rig in an SG03-F case, and want to see how far I can push it without temps being too crazy.

Before this I OC'ed an E8200 to 3.8GHz on air but i series CPUs are a bit different so I might need some help later.

Currently at 3.34GHz with stock vcore (1.25?).

I guess atm this isn't so much looking for help but a log, until I get stuck.

So here we go.

Oh and I idle around 40c but with P95 I hit 70c

Edit: Just checked settings, this is what it is atm:

1.2v vcore 3.36Ghz

1.6v RAM 1600MHz 7-8-7-24 1T

 

[Razor-BladE]

Ok now I need help..

It seems like it just doesn't want to go pas 3.36GHz.

I slacked the RAM to 9-9-9-24 1T, and tried all the volts from 1.2v to 1.3v but it just didn't want to boot at 3.38Ghz..

Anyone have any clue?

Edit: Found out it's the RAM that was holding me back.
Put down the ratio, and now I'm running on 3.45GHz at 1.2v, but my RAM is only at 1225MHz now.

What's a quicker system? Faster CPU or memory?

 

[Mick-1965]

ideally before pushing the cpu and ram, you need to find out what the max bclk you can achieve.
So turn down the multi, and the ram ratio and push up the bclk

 

[RichBowman]

I'd change the RAM timing to 2T as well - I've had issues trying to get mine to run at 1T. Worst case, it'll rule out the RAM causing any trouble, then you can tweak it later.

Rich

 

[Razor-BladE]

Well, this attempted overclock ended up being an undervolt

Because of the case and not so great cooling capabilities and that performance was fine for what I needed, I ended up staying with the OC I had but seeing how cool I could get it.

So now I have:

i5 760 @ 3.36GHz with 1.06825v (or thereabouts; can't remember exact figure)

4x2GB Ripjaw RAM @ 1600MHz 7-8-7-21 1T with 1.5v

Idle temps are sub 40c, and load temps with IBT are around 67c.

CPU draws just over 90w on 100%. When I was trying to OC it, it was drawing around 150w

Going to reseat the H50 because installation wasn't the smoothest, and move the rad to somewhere better so I'll see if it makes any difference.

 

[ReAPeR101]

I have a i5 750 CPU. Mine is currently running 4.0Ghz stable 24/7, when completeing benchmark testing i take it higher, but the following is exactly what i have set mine to.

Your motherboard is exactly the same motherboard i have so hopefully if you copy my settings then hopefully you will get a stable O/C

Each CPU is different though.

1. Disable the TURBO BOOST facility.

2. In advanced frequency settings menu enable the BCLK (base clock)

3. Now increase your BLCK frequency from 133Mhz to say 190Mhz. This should give you a nice O/C of 3.8. More Mhz in the BLCK will raise the O/C

4. Now we start on your memory find the SYSTEM MEMORY MULTIPLIER (SPD) when you have found that, enter that, if your RAM is over the rated 1600mhz you (if you want to of course) keep it within that figure so you would choose a divider, which in my case and yours would be 8.

5. Now we need to overvolt your system a little. Return to the MB Intelligent tweaker on the front page BIOS, and enter the advanced voltage settings.

6. Make sure the load line calibration is set to enabled.

7. Then underneath that line (CPUVcore) enter to start with 1.35v (this is to start with it may need more of less) try not to exceed 1.425v

8. In the same menu increase the QPI/VTT to 1.37v and then the PCH Core to 1.14v, then CPU PLL to 1.9v and lastly the DRAM voltage to 1.64v

9. F10, press enter and hopefully your PC will boot up with a nice 3.8Ghz O/C

10. Check temps via REALTEMP GT 3.6 (mine is currently residing around 35 degrees, cooling is a Thermaltake FRIO) And check that your O/C has been applied by using CPU-Z

11. Run Prime95 to check everything is working OK, make sure temps are 80 below, mine normally hits 65 max.

http://www.techpowerup.com/realtemp/

http://www.cpuid.com/softwares/cpu-z.html

 

[Razor-BladE]

Thanks, I shall bear this in mind if I do take another attempt to OC it, but I'm happy with the performance and the undervolt.

After reseating the H50 and moving the place of the rad I'm now getting around 36c idle and with IBT it doesn't go past 63c, so a nice improvement.