What do I need to change to increase OC?

[chriswatton]

I have a Gigabyte P67A – UD7 B3 mobo, i7 2600k CPU (with H70), 8GB of Corsair vengeance memory, C300 256GB SSD, 2 x 2TB HDD, Asus Zoner Essence soundcard (PCI-E), Corsair AX 850 PSU and 2 x GTX580’s in SLI. (All in a Corsair 600T case, and an extra SSAP 180 fan blowing directly onto the 2 gpu's)

I can overclock by changing the multiplier to 44 so that I get 4.4GHz. However, if I change this to x45, I get a BSOD when gaming. I then go back to 4.4GHz and all's fine.

My temps are great (Changed the H70 coolers to Scythe Gentle Typhoons), so it is either PSU (I don’t think so..) or I need to increase something else in the BIOS.

If it’s the latter, what would I need to do, bearing in mind that I am unsure what some of the setting do. Do I need to increase the ‘Vcore’, if so, by how much? It would be nice get a 4.6GHz overclock, as I’m sure my components could handle that.

Cheers,

Chris

 

[chris8224]

I have a Gigabyte P67A – UD7 B3 mobo, i7 2600k CPU (with H70), 8GB of Corsair vengeance memory, C300 256GB SSD, 2 x 2TB HDD, Asus Zoner Essence soundcard (PCI-E), Corsair AX 850 PSU and 2 x GTX580's in SLI. (All in a Corsair 600T case, and an extra SSAP 180 fan blowing directly onto the 2 gpu's)

I can overclock by changing the multiplier to 44 so that I get 4.4GHz. However, if I change this to x45, I get a BSOD when gaming. I then go back to 4.4GHz and all's fine.

My temps are great (Changed the H70 coolers to Scythe Gentle Typhoons), so it is either PSU (I don't think so..) or I need to increase something else in the BIOS.

If it's the latter, what would I need to do, bearing in mind that I am unsure what some of the setting do. Do I need to increase the 'Vcore', if so, by how much? It would be nice get a 4.6GHz overclock, as I'm sure my components could handle that.

Cheers,

Chris

you need to increase the vcore in small steps until it becomes stable (try not to go over 1.38v for 24/7 use) it is also recommended that you use prime 95 to stress test your system to be sure it is 100% stable, you may also need to manually set your ram timings and volts for that you need to look at the specs of your pacific ram.

hope this helps =]

 

[chriswatton]

you need to increase the vcore in small steps until it becomes stable (try not to go over 1.38v for 24/7 use) it is also recommended that you use prime 95 to stress test your system to be sure it is 100% stable, you may also need to manually set your ram timings and volts for that you need to look at the specs of your pacific ram.

hope this helps =]

Thanks, I'll try that - I know it's dangerous to go over 1.3V - but there are so many options in the BIOS, it can be quite daunting for people like me....

 

[chris8224]

Thanks, I'll try that - I know it's dangerous to go over 1.3V - but there are so many options in the BIOS, it can be quite daunting for people like me....

I have found a tutorial on Bit-tech on how to overclock a i5 2500k and a gigabyte P67A-UD4-B3.

i know this isn't what you have but it should give you a little more understanding about what some of the things do

im also sure that there are many posts on the oc3d forums that will help you to =]

 

[sheroo]

I followed that guide and got a some help from SieB. My P8P67 with a 2500K is running @ 4.4 @ 1.315 v stable.

 

[marsey99]

clunks forum has the best sandybridge ocing guide imo

you dont say what settings you have changed but load line calibration will help, as will more vcore.

1.35v should have you stable @ x45, 1.4(ish)v should get you round x48 and 1.5v for x50 but these are just ball park and without knowning how you cpu reacts its hard to offer much more than wild stabs in the dark. i mean for all i know you could be running x44 on 1.15v with a golden chip, you know.

 

[chriswatton]

This is a screenshot of CPUZ, when the CPU is at maximum

 

[sheroo]

If you can run it at that voltage and get those clocks stable running prime, looks llike you've got a really good chip there.

 

[chriswatton]

So if I change the Vcore voltage to something like 1.2, I should be able to overclock to 4.6GHz?

(It was on 4.5GHz before changing BIOS to F4, but since the flash, 4.4 is the highest on standard voltage)

 

[sheroo]

So if I change the Vcore voltage to something like 1.2, I should be able to overclock to 4.6GHz?

(It was on 4.5GHz before changing BIOS to F4, but since the flash, 4.4 is the highest on standard voltage)

The max recommended vcore for 24*7 operation is 1.38. So it looks like you have quite a bit of headroom. You just need to make sure that your cooling is up to scratch.

 

[chriswatton]

I have a H 70 cooler with gentle typhoon fans on them, cooling is good.

 

[sheroo]

I'm new to overclocking as well, but 4.4 on those volts is really good. I'm running 4.4 on 1.315 vcore. I think you've got more speed available there. Do you want to get the best OC with a kamikaze run, or are you looking for a 24*7 OC.

 

[chriswatton]

PS - and thank you for your posts

 

[chriswatton]

Am looking for 24/7 OC - PC is used for work all day (CAD/DTP etc) and play at night (at the moment, am hooked on World of Tanks, not exactly a system stresser...)