Re: OverClocking Asus P5WD2-E Premium & Intel D 805

Well, first, while I considered doing exactly what you did (except for the heatsink), I decided that I would not buy a motherboard that was not Core 2 Duo (Conroe) compatible. So I waited, because none of the Asus P5WD2 boards are known to be Conroe compatible (the -DH model is, but that is a new board that didn't exist until a couple of weeks ago).

Also, you got the wrong heatsink. The cooler to use is the Zalman CNPS9500. No contest there, that is the one to use (for ANY socket 775 configuraiton in which CPU cooling is an issue, and certainly for all overclocked processors).

As far as overclocking the 805, the 805's native mode is a 2.66GHz speed with a physical clock of 133MHz and a [fixed] multiplier of 20 (the 133MHz physical clock is "quad pumped" inside the CPU to a 533MHz FSB speed). The overclock that seems to work best with the 805 is a physical clock of 180MHz, which gives 3.6GHz (the FSB is going to be 720MHz). While some of these CPUs can go above 3.6GHz, the minor additional speed that you can reliably get just isn't worth the trouble it takes to get there. Leave the voltages alone, at their default values. Additional voltage is rarely required. The best memory to use is 800MHz (PC2-6400) (which will actually be running at 720MHz), but by adjusting the memory multipliers you may get other memory to work.

Based on some benchmarks that I saw, the Pentium D 805, overclocked to 3.6GHz, is within 1% of the very lowest speed Core 2 Duo (1.83GHz, I believe) in terms of average overall performance. Admittedly, it only costs about half as much. But the Conroe runs dramatically cooler (the power dissipation is half that of a Pentium D), and this is the very lowest end of the Conroe range, with the smallest cache. Clearly Conroe (Core 2 Duo) is a dramatically superior processor family.

jeanfrancois.chapdelaine@xxxxxxxxx wrote:

Hi,

Like a lot of people, I got all exited after reading the following
article from tom's hardware:

http://www.tomshardware.com/2006/05/10/dual_41_ghz_cores/

I was about to buy a new computer when I read that article. So I
decided to buy about the same computer they used to make this article.

Asus P5WD2-E Premium
Intel Pentium D 805
OCZ DDR PC-4000 500MHz 2x512MB Dual Channel / Platinum Edition
COOLERMASTER REAL POWER 450W ATX 12V
ATI X850 XT Platinum Edition
2 X 250 GB Western Digital 16MB (RAID0)

And for the cooling I bough the nice Zalman RESERATOR 1 Plus.

So after building the computer I started by testing the stability of
the system at the default settings. It running very smooth and without
any problem even after 5 3DMark runs and a full night of torture test
from prime95.

So I started overclocking. I used prime95, PCProbe from asus and 3dmark
the newest version.

So finally, I realized that Reserator 1 plus is not as great as it
look. At 200 MHz 4.00 GHz the CPU temperature was at 95 C during the
3Dmark and the application crashed during the CPU test. With that
temperature, raising the VCORE voltage is not an option to gain
stability.

I tried at 190 MHz 3.80 GHz and the problem was still the same...

I then tried at 180 MHz 3.60 GHz. The temperature was not a problem
anymore at that frequency. But during the 3DMark, it was still crashing


at the CPU test. I decided to raise the VCORE voltage notch by notch.
But that did make any difference. The default VCORE for this CPU is
1.3375. I raised the VCORE up to 1.5 and it was still crashing. I then
tried to raise the Memory voltage. The default voltage for the memory
is 1.8. I tried up to 1.9 and it was still crashing.

So I decided to try at 170 MHz 3.40 GHz. It was still crashing during
the 3DMark test. I tried the same procedure with the Voltage once again

at that frequency. But the results were the same...

The system look very unstable to me...

But all the hardware I got in that box is recommended for high OC.

If anyone has any suggestion, I would strongly appreciate it.

Thanks in advance.

PS: sorry for my bad English, my first official language is French.

.

Relevant Pages

  • Re: OverClocking Asus P5WD2-E Premium & Intel D 805
    ... As far as overclocking the 805, the 805's native mode is a 2.66GHz speed ... 133MHz physical clock is "quad pumped" inside the CPU to a 533MHz FSB ... Additional voltage is rarely required. ... adjusting the memory multipliers you may get other memory to work. ...
    (alt.comp.periphs.mainboard.asus)
  • Re: is 333Mhz-400Mhz a LOT of overclocking?
    ... Overclocking to gain performance is not very important (I'm doing fine ... and memory is flexible I could just set it to get close to the memorys ... would raise the CPU speed too is the much larger benefit. ... speed so you pick ratios of what the memory bus to fsb speed is. ...
    (alt.comp.hardware.pc-homebuilt)
  • Re: Mainboard/CPU Temps
    ... > System Memory Controller ... > Multiplier: 2/1x ... > CPU Fan Speed: 4355rpm ... > Voltage Sensor ...
    (uk.comp.homebuilt)
  • Re: p2b and iwill 2.0 slocket
    ... Don't forget sometimes, the problem can also be with the CPU, not all CPUs ... As well, overclocking sometimes always require ... My first attempt at o/c was the old Celeron 266 at 400/no voltage necessary ... it would freeze often with stock voltage until someone told me I ...
    (alt.comp.periphs.mainboard.asus)
  • Re: Problem with hard drive
    ... The STOP code indicates a motherboard level problem. ... Could you have bumped the memory chips, PCI cards, power connectors, ... If you took the CPU heatsink off, ... PSU voltages should be within 5% of stated voltage. ...
    (microsoft.public.windowsxp.hardware)