a8n-sli memory speed problem

[mpriester]

System specs

A8n-sli
(2) 74Gig WD raptors not raid SATA
(1) 250 Gig WD 7200 SATA
4 Gigs CORSAIR 2G(2X1G) Twinx2048-3200c2 R
Athlon 64 4000+ SanDiego
Thermaltake Power Supply W0057 500W Modular
Pioneer 16X DVDRW-DL
1.44 Floppy
ATI X800XL 256Meg PCI-E
Windows XP Pro 64bit

I installed all the hardware, flashed the BIOS to 1008 and checked the settings.
All memory etc is set to AUTO, this machine is not getting overclocked.
First two times it booted it showed DDR400 but it froze in the BIOS while I tried to turn PEG off. After resetting a couple of times, it started running the memory at DDR333.
I manually set it back to DDR400 but the sytem would not boot and I had to clear CMOS to get it booted again.

Is there a problem running DDR400 with all the memory slots full or does it sound like there may be a defective memory module?

Any suggestions?
Thanks

 

[luky]

Old specs for Winchester says with 4 modules you have to run on 333. Not sure how is it with SD

 

[Ketchup]

Originally posted by: luky
Old specs for Winchester says with 4 modules you have to run on 333. Not sure how is it with SD

What he said. The memory controller built into the CPU won't be able to address that much DS memory at DDR 400. Some extra voltage might help, but I am guessing since it won't even boot, you will need to add at least another .1 volts to the CPU.

 

[Kovie]

SD is a revision E as well, just like Venice. AMD's official stance is Venice/SD can do four DS modules at DDR400 at 2T. Could be voltage, could have to lax its timings, or could be any number of things. Try with one or two sticks and fiddle with the bios with those if they seem to work alright.