I have now had the grace of using two of ocz's best dual channel ram. I have used both the pc3200 el 2*256meg DC and the pc3500 el 2*256 DC.
Here are the results:
pc3200 came to a overclock of 426 with Vdimm of 2.9V and timings of a somewhat relaxed 2-2-3-6
pc3500 overclocked to a better 466 with Vdimm of 2.9V and timings of again a somewhat relaxed 2-2-3-6
Both were tested on the same motherboard which is a ABIT NF7-S
with the chipset voltage increased from the default 1.6V to 1.7V being the 1.6V is a standard increase from the manufactures specs of 1.5V
Barton 2800+
onboard sound
thermalright sk-7 with artic silver
These results are supposed to give someone who is considering buying either of these ram a idea of what to expect upon purchase
one final note.. the pc3200 is dual sided ram while the pc3500 is SINGLE sided...


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I'm still wary of OCZ RAM personally, too many flaky stuff in the near past for me. I much prefer to look at Crucial or TwinMOS, generic is okay if you have a really tight budget and the likes of Corsair is way over-priced. Still I would rate OCZ higher than Geil but IMHO that's not saying much really.
Of course for SktA owners there's little point in going for more than PC3200 as 400FSB is already more than they (heck they're right around 2.1ghz), do consider how much you're paying for minimal gains. Also watch out for the 'low latency', 'dual matched' and 'hand picked' slogans as IMHO they're only there to take more of your money and almost entirely unecessary. I'm sure I'm in a minority but that's my opinion anyway!
Possible but FSB speeds above 400mhz are more for show or bragging rights than actual perf gains, SktA simply doesn't need the bandwidth. I'm not saying the gains are zero, just that they're very small esp when you consider the added strain and cost of all the components involved. As processor speed increases the FSB and RAM bandwidth become bigger issues, perhaps around 2.5ghz there would be the same sort of gain as there is on a 2.0ghz CPU going from 266FSB to 333FSB.
Okay it's not a lot of cash in that example but you're still paying 5% more for virtually zero real world gain. Not that £8 is really going to get you a better gfx card or CPU but that is where I'd suggest plumping the extra 5%.
Using the 256mb sticks (most popular size esp dual channel) as an example you pay 15% more for PC3500 and just over 40% for PC3700. For 2 sticks that's an extra £18.98 and £51.44 respectively you're paying for a VERY minimal real world perf gain.
£20 could get you an XP2600+ 333FSB over an XP2100+266FSB or an XP2000+ 266FSB over a Duron 1.3ghz 200FSB. £50 could get you an XP2700+ 333FSB over an XP2200+ 266FSB or an XP2500+ 333FSB over a Duron 1.3ghz 200FSB. In gfx card terms £20 gets you Rad9200 over a GF2mx400 while £50 gets you a GF4TI4200 over a GF2mx400 and nearly a Rad9800 over a GF-FX5600ultra. I'd say there's more benefit putting your money there 
