Intel P4 630 @ 4,0 GHz with 400 MHz DDR?

[Da_maniaC]

Hey there,

I was wondering if it was possible to get a Intel P4 630 @ 4 GHz while leaving the memory modules at 400 MHz.

Is there a divider i can just change?
(By changing memory bus speed).

Its the PC of a friend of mine and he has stock 512 modules so i really dont feel like OCing them before they get fried. (I believe they are infineon or kingston).

The rest of his setup:

Asus P5P800 SE
Intel P4 630
Ati 9600 XT.
Spire "bladiebla" 600 Watts SLI PSU.
Zalman Reserator.

He got it on 3,9 GHz before with auto overclock in the Asus BIOS.
Though i wanna do it by hand since he doesnt have a clue what he is doing actually.

Also it became unstable @ 3,9 GHz with the last CPU tests in 3Dmark05.

Whats the maximum voltage i can use on a Prescott ?

Im into Northwoods myself, so i have no clue on what voltage i can due maximum.

Thanks in advance for any info.

[monkeypants]

Max voltage I'd comfortably use 24/7 is 1.5v maybe 1.55 on water.

You should be able to set the memory divider to 333 or 266 whichever keeps it closest to 400Mhz, I suspect 266 with it being a 630 with a multiplier of 15.

[Da_maniaC]

OK, thanks a lot for the information.

Lets see what this thing can do... :P

Luckily the temps were no problem it was 43 degrees stressed with the reserator so.. :)

[kyleslater]

Well... I had it @ 4.2Ghz unstable (because of my PSU) with the ram dropped to 266 and it was pretty near 400Mhz at that point. BTW. My Kingston did 444 just fine. It was Value ram and I ran it @ 2.5-3-3-5 and 444Mhz.

[Da_maniaC]

OK, so i just had a look at this thing today...

The voltages freaked me out.

When i start up his machine and look at his vcore voltages they show 2.5 volt. (using CPU-Z).

Then i do a torture test with Prime95 and look afterwards and the voltage shows around 1,2-1,4 volt. (What it should be).

Is this some inaccuracy by CPU-Z or is this not normal?

--

Since the voltage stayed on around 1,2 i turned it to 1,4 in the bios.
Then i looked again and it went from 43 degrees idle to 49 degrees idle.
While the overclock didnt become more stabile at all.

Anyone that can tell me whats going on with that vcore in the beginning and if its save to just force 1,45 - 1,5 volt?

[Da_maniaC]

Anyone?

[Burdman]

If it didn't help the OC at all and only made it hotter, then I'd probably leave it where it is. Also if your voltage is fluctuating a lot it's usually a crap PSU to blame, so may I ask if you know what PSU he has (specific model if possible)? Also do keep in mind since the max oc the board gave was 3.9 (usualy by ocing till it reboots) there's a good chance it won't be stable at that speed and won't go any higher without upgrades to whatever parts are holding you back (be it cooling, PSU, RAM, or mobo).

Unfortunately I haven't messed with prescotts much, I'm still on my Northwood until Conroe and I've occasionally messed with friend's AMD system, so I'm not sure if I'm the guy to be giving advise on what voltages to use.

Good luck and hope you can get his system to run nicely.

[kyleslater]

Well for me to get to 4.2 I had to use 1.55 volts with that board. After about a week I was able to lower the Volts to 1.42. I changed boards and it was much more stable and cooler. I was getting 65C with 1.55 volts on load @ 3.95. But the only real stable setup I had on that board with reasonable temps and air cooling was 3.75Ghz.