System underperforming?!?

[Ungoliant]

i just recently built a system with:
ASUS P5RD1-V
P4 640
OCZ 1gb (512x2) gold edition
onboard video
my system kept crashing with the OCZ gold stuff, so i'm sending it back for the platinum version (2-3-2-5 timings instead of 2-2-2-5) instead. i replaced it with an old stick of memory that i had (pc2700 512 mb stick) and ran some tests and it seems that my system is underperforming. once i saw that celerons were beating me, i knew i had a problem
also ran sisoft sandra test and it believes that both my processor and memory are underperforming. i tried tightening the latencies in the bios, but it didn't seem to be doing anything. any ideas?

 

[Clockworks]

- Check to make sure that the FSB is at the correct setting (check the motherboard's manual)
- Run Memtest86+ to make sure that you don't have any problems
- Make sure the heatsink is seated properly
- Check the temperatures

This is all I could think of at the moment, if more people would add more opinions it would be helpful.

 

[setscrew]

Your onboard video may be sharing system memory, thus increasing sytem overhead. I would also assume since you are using integrated video, that your audio is integrated as well. If this is the case, that would be another potential loss.

When you installed the previous RAM, did you install them into the dual channel configuration as per the motherboard manual? If not, that would reduce performance as well.

What is the load temperature of the processor (use Motherboard Monitor or something similar)? If the heatsink is not properly seated, the processor may be throttling due to excessive thermal conditions.

 

[Ungoliant]

the cpu is usually at 28-30C with my zalman fan and AS5. i'm pretty sure it's this crappy chipset. i've been really displeased with this motherboard so far. i think i'm going to take it back and go for a P5WD2-Premium. probably a better choice