Q6600: 1333vs1066

[snufflekitty]

So I was wondering, how much of a difference am I going to notice going from 1066fsb to 1333fsb, if I'm only actually increasing the the processors resulting frequency by ~200mhz.

Stock we have it sitting at 266x9 (2.4GHZ) with a fsb of 1066.

I've set the fsb to 1333, but lowered the multi to 8, resulting in 333x8 (2.66GHZ).

I'd had it set to 333x9 (2.99GHZ), but that caused an error in my Prime95 burn.

That may in turn be because my Q6600 was undervolted at the time (only a little, sheesh), so I've set the vcore to stock and I'm letting it burn in Prim95 at 2.66GHZ.

Temps look fine; more than fine actually, but I don't suppose that I should expect much a difference from a 200mhz overclock. Now I don't know how hot the northbridge is getting, but this board is rated for 1600fsb, so, I don't expect that it's getting terribly hot.

You might check out this thread if you have any other questions about my build ;3.

http://www.tomshardware.com/forum/253945-28-q6600-temps-right

-SnuffleKitty

 

[jimmysmitty]

Well what you need to do is get Everest and check yourr VID. Whatever it is (maybe 1.25v) set it to that in BIOS and make sure to set your memory timings and voltages to the spec. That should let you get a 3GHz OC without Prime95 errors. I did it at 1.248v with Prime95 stable for 12 hours.

The increase you would see is relative to say a Q6700 right now and if you OC it to 3GHz it would be just about the same performance as a QX6850 so about 10% in most and more in multi threaded apps.

Your northbridge will be fine as I run mine on a 1333MHz FSB 24/7 and my P35 chipset is rated at 1066 but can OC to 1333 which I have done.

Also try a 1:1 FSB satio. So the memory should be set at DDR 667MHz which will give you a 1333MHz FSB to the memory and thus a 1:1 ratio which is normally much more stable.

 

[snufflekitty]

Well at this point I have the vcore set to "normal," so I suppose it's setting at around 1.2625 or something. At least I hope that that setting just reverts the vcore to stock settings ;D.

Now, just to clarify, I'm running with a 2GBx2 kit of Corsair Dominator PC2-8500 (DDR2 1066). So um, running the FSB/RAM 1:1 isn't going to happen.

But really, the overclock, be it 2.66GHZ, or 3.0GHZ, isn't what concerns me right now.

I want to know how the increase in FSB is going to effect the rest of my system's performance.

If I were to lower my multi to 7, effectively 333x7 (2.33GHZ) would it be considerably faster than my system running stock at 266x9 (2.4GHZ).

-SnuffleKitty

 

[jimmysmitty]

Actually I have the same RAM in my PC right now and its running at a 1:1 FSB ratio. Check my sig it has my CPU-Z validation. Funny thing is its just Corsair XMS DDR2 PC 6400 but tested to be able to be rated at PC 8500 and needs 2.1v. I was also lucky to be able to get mine stable at 4-4-4-12 timings instead of the normal 5-5-5-18 timings.

As for the FSB, it will because the FSB will push the data through faster. I wouldn't be able to tell you exactally what the difference is as I OCed my Q6600 the day I got it so I never compared but its probably 5-10%.

 

[snufflekitty]

666 at 4-4-4-12? That isn't just lucky; it's insane.

-SnuffleKitty

 

[someguy7]

The increase in FSB speed will make very little difference. Raising the FSB and dropping the multi down is pointless for the most part

Your ram can run 1:1 if you wanted it to. Basically you need to read some threads/stickys on overclocking the intel core cpus.

http://www.tomshardware.com/forum/240001-29-howto-overclock-quads-duals-guide

From what I gather from your post in the this thread you really dont know what you are doing.

 

[jimmysmitty]

666 at 4-4-4-12? That isn't just lucky; it's insane.

-SnuffleKitty

No its not 666. Its 333. Remember that DDR2 is Double Data Rate. So 333 is more like running it at 666/667. So then you have dual channel which doubles the data rate again to 1333.

So in BIOS you should be able to select the memory ratio or at least, like mine, the memory speed. Mine I selected was DDR2-667 which gives me a 1:1 FSB at the timings of 4-4-4-12.