At wit's end

Although running fine at stock speeds, this is a short list of what I can't get my box to do stable:

-run any higher than fsb 189 x5 synchronous, no matter what timings and voltages
-run async fsb 166, dram 200 at 7-3-3-2.5
-run async fsb 166, dram 200 at 11-4-4-3
-run async and single-channel fsb 166 and dram 200 at 11-4-4-3

However, a single stick of ram (no matter which one) WILL run async at 200 w/o errors and 7-3-3-2.5!

This is with 2x 512mb pc3200 ram! (Twinmos w/winbond)
Also running NF7-S v2.0 and an XP2800+.

It seems to me that I cannot make my 400 mHz ram run at 400 mHz.....
Anything glaring that I haven't tried?
Should/could I RMA the ram?

up the chipset voltage then u might be able to do 200+ fsb with dual channel

Ya, that might be the one thing I overlooked with the most relaxed ram timings.

tell us how u get on once u upped the chipset voltage

Sure thing.

I just cannot make any sense out of the fact that the two ram sticks will work separately, but not together. Even running single-channel.

properly is the chipset cant handle it u wont know intill u try upping chipset voltage

OK, tried upping chipset and vDimm voltages to 1.7 (max) and 2.9. Will not run stable at 186 fsb.

Also finally found out what the beeps at startup mean: according to a mail fra Abit, I have cpu or memory problems. That might explain it, I guess.

So now I am trying to think who I might borrow a cpu and ram from to try and isolate the problem....