which one of these?

My ram is the TWINX2048-4400 Pro from Corsair.

I have a few options:
clock speed latency
558 (2T) 2.5-3-3-7
546* (1T) 3-4-4-8

From a different site... I guess the mhz are cut in half cause of the DDRness.
They did not mention if it was 2T or 1T, but the speed leads me to believe it is 2T.
(291) (2T) 3-4-4-8 (some tweaking in A64 tweaker)
(236) (2T) 2-3-2-6
(275) (2T) 3-3-3-8

Even without the tweaking I was able to reach 275mhz easily on 3-4-4-8 and 2T... so my ram may be a little better than theirs was...

OK I have it set up like this:

1:1 divider
280mhz fsb
3-4-4-8
TWTR=2
2T
TRC=10
TRFC=16
TRTW=6

Now where should I go from here?

OK... I have it at 275mhz right now... and I did 1 pass on memtest (I have work to do now...), but 280mhz also runs (2.75-2.8v)

Here are the settings.
tras = 5
trc = 7
trfc = 13
trcd = 3
trp = 4
cas = 3
2T

L1 Cache: 128k (24824MBs)
L2 Cache: 1024K (6168MBs)
Memory: 2048 (2233MBs)

275Mhz

Where should I go from here? 12 on the multiplier does not work for the cpu (may need more power)... and 280mhz wasn't tested, but it runs w/ current settings.

With DDR2, I'm finding the higher freq is ruling over the lower lats due to the total bandwidth. YMMV depending on your ram's frequency ceiling.

Well my a8n-sli deluxe took a **** today... I'm on my powerbook. I will probably get a new mobo next month. (GFD)