OC'd 1.8a vs. 2.4a Northwoods

[dawgtuff]

What's the performance difference between a P4 1.8a (L2-512kb) overclocked to 2.4gig. and a stock P4 2.4a? Using OC'able pc2100.

[Midknyte]

Since they both have the same core, there should be no difference at all. The 1.8 might not be as stable, though. I've seen several 1.8s run at 2.4 with no problems at stock voltage. The stability depends a lot on your motherboard.

[dawgtuff]

Would a Asus p4s333 do?

[gibsinep]

The 1.8@2.4 should be faster as it is running on a higher BUS. Higher FSB= faster.

[Midknyte]

That's true. I was only looking at the overall clock speed. the 1.8 oc'ed to 2.4 would be the equivalent of the 2.4B, not 2.4a. oops. So i'll agree with gibs on that.

[gibsinep]

Thanks :t

[bhongskie]

Originally posted by Midknyte
Since they both have the same core, there should be no difference at all. The 1.8 might not be as stable, though. I've seen several 1.8s run at 2.4 with no problems at stock voltage. The stability depends a lot on your motherboard.

In my opinion, I think it depends largely on the cpu. This is because i have tried to o'clock a 1.6a to 2.13 (that is at 133 fsb) stably without a hitch using stock Intel fan and heatsink and with a minor adjustment in the vcore. When I got a 1.8a and tried o'clocking using 133 fsb ON THE SAME BOARD my computer did not POST. The highest I was able to o'clock the 1.8a was at 2.25 Ghz (18 x 125fsb) with the voltage all the way up to 1.6V. By the way i am using the MSI 645 Ultra (no superior o'clocking options though)

[gibsinep]

bhongskie- I thijnk it has more to do with the motherboard than the CPU.

[dawgtuff]

bho-OC'ing a 1.6 to 2.1 w/ a MSI 645 shows you had a good 1.6 cpu. The 1.8a w/+voltage sounds like you got a inferior cpu....luck of the draw? I have a P3-550e, OC'd to 733, which is supposed to do 850......if you get the right CPU. I did'nt,but, I can't complain. Two years and it's still running strong, and really there's not much of a difference between 733 and 850 if you have plenty of fast ram.
Since the major bottleneck now(as far as real performance) is the CPU's FSB, I want to get a CPU that's cheap and will FSB overclock to match some good DDR ram. With a good mobo.....of course!

[bubbleflap]

Hmm, if you could keep the overclocked 1.8 stable, it would outperform the native 2.4 :t :t
.... Your gonna have quite a job keeping it stable though! lol

-->Bubbleflap

[gibsinep]

1.8@2.4 it isnt that hard

[Midknyte]

By changing the 1.8a to 2.4, you are just increasing the FSB to 133 from 100. The p4s333 motherboard and ram should handle this just fine. Once you start going over 133, then motherboard and ram stability issues come into play. You might need to tweak the cpu voltage a little, but I've seen or heard of many people that get to 2.4 with stock voltage.

[gibsinep]

^^^ Just as he said not a huge overclock really.

[dawgtuff]

Midk&gibs- I've read the p4s333 is stable when tweaked w/ good ram. I'm getting a 256mb single sided stick of Samsung pc2700. It was reviewed to go to 200mhz.
If there's a better mobo available at the same price($70US), let me know.

[gibsinep]

Sorry Dawg I am not very knowledgable with Intel Motherboards, so I dont know of any cheaper and better boards.

[Midknyte]

The p4s333 is a pretty good board. it uses an SIS chipset which is a hell of a lot cheaper than an intel. Performance is pretty good with that board.

[or-g]

Originally posted by bubbleflap
Hmm, if you could keep the overclocked 1.8 stable, it would outperform the native 2.4 :t :t
.... Your gonna have quite a job keeping it stable though! lol

-->Bubbleflap

I've been able to do 3ghz stable

But reduced it down to 2.7 so I can have my ram at 200mhz, and so I don't burn up the cpu.:x