Dennis said:
--
Hi,
I have a ASUS P4P800-E MB. I just ordered an
Intel 2.8Ghz, 800Mhz FSB, Imeg cache CPU.
I'm confused about all the memory options. I want
to put 1Gig of the fastest memory on the board. I
would like to take as much advantage as I can with
this chip. Any reccomendations greatly appreciated.
TIA,
Dennis
First of all, you may want to read this:
http://abxzone.com/forums/showthread.php?t=62275
You have two overclocking options. Use PC4000 memory
and run the FSB at 250MHz, and the memory at DDR500.
The setting in the BIOS will read "DDR400" but the
hardware runs at (250/200)*DDR400 = DDR500. This is
the "1:1" FSB:MEM ratio option.
The second option uses the 5:4 divider. Set the memory
to "DDR333". It actually runs at DDR320. When you run the
FSB at 250MHz, the ram runs at (250/200)*DDR320 = DDR400
and PC3200 fits perfectly in this overclocking scenario.
If you think your processor will go higher than
(250/200)*2.8GHz=3.5GHz, then buy slightly faster
memory, like PC3500 or PC3700.
Consult
http://cpudatabase.com for overclock statistics.
Due to the possibility of video artifacts, you may want
to do some more reading on abxzone.com, to see if anyone
has come up with a solution for artifacting on the P4P800.
The 5:4 option should avoid the artifacts, and still leave
room to experiment, but doesn't have quite the same memory
bandwidth, which will make a small difference.
The second issue is the fact you bought a Prescott. It
runs hot at stock speed, and is going to run a lot hotter
when overclocked. What is interesting in cpudatabase.com
for the Prescott 2.8, is people don't need to boost the
voltage that much to overclock, implying the processor is
thermally limited, rather than reaching its max overclock.
A Northwood with 512KB cache, won't overclock as high, but
it won't get as hot either.
HTH,
Paul
