Will Going To 8GB Affect My Q6600 Overclock?

[clarkey01]

I have been looking at the following kit (x2)

Kingston HyperX 4GB (2x2GB)

Is there any risk I will not be able to achieve the same overclock by going to 8GB and going from PC800 to PC2-8500C6 ?

Cheers Guys

 

[JAG87]

You will have a really really tough time getting 8GB of ddr2 to run at DDR2-1066.

Even with those relaxed timings, with 8GB at 1066 you are hammering your northbridge. Your cpu might remain stable since 333 FSB isn't much of an overclock, but the northbridge might still give up.

Stick to DDR2-800 if you want 8GB, grab another kit of what you have now. If you have the ballistix 4-4-4-12 that might also be a problem. You may need to run 5-5-5, or bump the RAM/MCH voltage a notch.

 

[clarkey01]

Originally posted by: JAG87
You will have a really really tough time getting 8GB of ddr2 to run at DDR2-1066.

Even with those relaxed timings, with 8GB at 1066 you are hammering your northbridge. Your cpu might remain stable since 333 FSB isn't much of an overclock, but the northbridge might still give up.

Stick to DDR2-800 if you want 8GB, grab another kit of what you have now. If you have the ballistix 4-4-4-12 that might also be a problem. You may need to run 5-5-5, or bump the RAM/MCH voltage a notch.

Better Choice?

Again?

 

[akugami]

I have different RAM that is DDR2-800 but I run it at 4-4-4-15 2T, it's pretty much impossible to run it at 1T.

As JAG87 said, it might be hammering your northbridge a bit too much to run it at such high speed or with tighter timings. To be honest, unless you're only overclocking by 100 to 200mhz, your overclock will more than make up for the very small performance lost in relaxed RAM timings and speed. A 20% RAM performance drop does not equal a 20% overall computing performance drop since RAM is only a small part of an overall system.

 

[clarkey01]

Originally posted by: akugami
I have different RAM that is DDR2-800 but I run it at 4-4-4-15 2T, it's pretty much impossible to run it at 1T.

As JAG87 said, it might be hammering your northbridge a bit too much to run it at such high speed or with tighter timings. To be honest, unless you're only overclocking by 100 to 200mhz, your overclock will more than make up for the very small performance lost in relaxed RAM timings and speed. A 20% RAM performance drop does not equal a 20% overall computing performance drop since RAM is only a small part of an overall system.

Say if I get 8GB 6400 ram with timings of 5-5-5-18, you reckon I will be able to maintain my 3ghz OC ?

 

[JAG87]

Originally posted by: clarkey01

Originally posted by: akugami
I have different RAM that is DDR2-800 but I run it at 4-4-4-15 2T, it's pretty much impossible to run it at 1T.

As JAG87 said, it might be hammering your northbridge a bit too much to run it at such high speed or with tighter timings. To be honest, unless you're only overclocking by 100 to 200mhz, your overclock will more than make up for the very small performance lost in relaxed RAM timings and speed. A 20% RAM performance drop does not equal a 20% overall computing performance drop since RAM is only a small part of an overall system.

Say if I get 8GB 6400 ram with timings of 5-5-5-18, you reckon I will be able to maintain my 3ghz OC ?

Yes, easily. I am running a much greater OC then you, on a much shitter chipset.

But try to stick to the same ram. If you already have 4GB of ballistix, buy another 4GB of the same exact ram. Try it at 4-4-4-12, with the default voltage spec from crucial (I believe its 2.0v). I have a hard time believing that will be stable, but everything is possible. Run memtest86 overnight to be 100% sure, ram errors are the last thing you need. If it's not stable, bump the ram and/or the MCH voltage by +0.1V (could be one could be the other or could be both, you need to play with it). If you can't get it stable with, drop the voltages back to stock and relax the latencies to 5-5-5-18.

 

[ionoxx]

I've been running my ram 1:1 with my CPU at default speeds for a while, without any issues. I haven't tried to OC since I installed the 2nd kit but It's running fine at DDR2-1066 @ 5-5-5-15 2T.

 

[n7]

P5Q-D is a good mobo for 8 GB.

I'm pretty sure i've seen you ask this 8 GB question in about three different threads over time now, with you having a P5B-D originally.

With the proper settings, you'll be able to run DDR2-1066 with 8 GB on the P5Q-D, but that Kingston is rated rather loosely....6-6-6 is kinda odd, with 7 as SPD...well it's likely because that's the IC's default frequency/timings, but still.

Anyway, all you need is DDR2-667 for maintaining 3 GHz with a Q6600...that's not going to be an issue, but as i mentioned, neither will DDR2-1066 with tRFC loose & NB Voltage upped a notch or two.