Some quick OC questions

[MG42Maniac]

Hey Guys,

I'm pretty new to overclocking so I thought I would ask a couple of stupid questions to try and avoid killing my PC! I have overclocked before, both my AMD64 3000+ ( to 2.2Ghz) & AMD64 3700+ (to 2.8Ghz) and that was fairly easy, I just set a divider and slowly increased the HTT until hey presto I have a nice little OC and then raised the volts of get it stress test stable.

But I am new to the whole C2D setup so I am not sure exactly how far components can be pushed and what to watch out for. I have looked through a few guides on the net and I know that it order to get a higher clock speed you need to increase the FSB just like you did with the AMD64. At the moment its set at stock ( 334 x 8 - 2672) and ideally I want to get 3.2-3.4Ghz so I am looking for a 400Mhz to get me to 3.2GHz.

The RAM I have is 2GB OCZ Plat PC6400 rated 4-4-4-5 yet for some reason they are showing as 5-5-5-15 in CPUZ with a FSBRAM ratio of 5:6, is this correct?

Also does anyone know how much the RAM can be pushed without touching the volts? The timings seem pretty slack so I am guessing the RAM can be pushed pretty far.

Also how much is a safe voltage to pump through these CPU's?

System Specs:

C2D E6750 with Arctic Cooler 7 pro
Asus P5K
OCZ Plat PC6400
Hiper Type R 580W


Thanks!

 

[Teaf]

The RAM I have is 2GB OCZ Plat PC6400 rated 4-4-4-5 yet for some reason they are showing as 5-5-5-15 in CPUZ with a FSBRAM ratio of 5:6, is this correct?

If it's rated at 4-4-4-15 it should be that, chances are the motherboard isn't picking it up properly from SPD. You would have to set that manually in the BIOS, but really if you are overclocking and also increasing the freq. of your ram at the same time then you might want to just leave it at 5-5-5-15 for stability reasons.

Also does anyone know how much the RAM can be pushed without touching the volts? The timings seem pretty slack so I am guessing the RAM can be pushed pretty far.

Hard to say, but at a guess I'm think that OCZ ram could probably hit 1000mhz. That's just a guess however, it's branded ram and a good brand therefore it should be pushable to that range given that it's already at 800mhz.

Also how much is a safe voltage to pump through these CPU's?

I think people say the max on air, and with seriously good air cooling, is going to be 1.45v to 1.5v. I doubt you could get that high with an AF7 Pro.

 

[Topitoff]

I have this CPU and RAM.

The SPD RAM timings are for 1.8v and the divider on auto has set the RAM at it's default speed of 400MHz vs FSB of 333MHz - 333:400 = 5:6.

With a reasonable clocker you are likely to get to 3.2GHz without an increase in vcore, but to run the RAM at 400MHz 4-4-4-15 you will probably need to up the RAM volts. Not sure if your mobo defaults to 1.8v, if it does then +0.2v (2.0v) should be enough - NB OCZ RAM is warrenteed to 2.2v +/- 5%. You will also need to set the RAM:FSB to 1:1.

Mine will go to 3.6GHz with 1.425v, 450MHz 5-6-6-18 @ 2.0v - 8hr orthos stable. Had the RAM running @ 475MHz 6-6-6-21 @ 2.0v. Haven't yet optimised the RAM timings for the above settings but I would think tighter timings are possible especially with more v.

As the man says 1.45-1.5v on air would seem to be a sensible max. Use coretemp 0.95.4 for monitoring temps.

 

[Tetsujin]

I think people say the max on air, and with seriously good air cooling, is going to be 1.45v to 1.5v. I doubt you could get that high with an AF7 Pro.

If it's relevant, my e6600 with af7 sitting on it has been OCd to 3.1Ghz and sitting there with vCore at 1.5 for the best part of a year, and i hardly ever turn the thing off. coretemp tells me both cores are around 46 degrees right now, tubesurfing and winamping, essentially idle.