Hey guys I am building a new system with my tax return

AMD ATHLON XP 2600 /333 FSB PROCESSOR CPU $279.00
A7N8X Deluxe $149.00
512MB PC3200 400Mhz DDR Samsung $149.99 x2
Microsoft Windows XP Pro OEM $134.95
THERMALTAKE VOLCANO 9 cool mod $29.00
enermax 350w "whisper" power supply $49
100 Gig WD SE already got.

and I was wondering. I am getting the DDR400 Ram and underclock it to DDR333(runs in snyc with FSB and Processor) if I do that would that give me head way to push down the memory timings to 2-2-2 ?