Your M/B Supports DDR3(and has a 1600mhz FSB) ....So DDR3 is what you want for maximum memory performance.

Are you running 32 bit or 64 bit XP Pro?

32 bit- fit 2 x 2Gb sticks

64 bit: - fit 6gb (your M/b supports up to 16 gb of ram)

Austin Have :
G.Skill [B]4GB KIT DDR3 1600Mhz [/B]VALUE SERIES CL9 9-9-24, Non-ECC, Un-buffered 240 pin DIMM [F3-12800CL9D-4GBNQ] [B]$135[/B]

if you are not interested in gaming then i would say run with the 1600mhz.

MY REXTC; what ram do you have in there now?

You won't notice any difference going to DDR3 ram on your dual core. Sure, if you benchmark it and read the numbers there will be a gain, but nothing that will be overly noticeable when using your applications. DDR3 will show a bit of an improvement with Quad Core cpu's and larger caches, etc.

I would definitely buy DDR3 if you *need* new RAM now, as you'll obviously carry the RAM over to your next cpu/motherboard upgrade. I wouldn't buy it just for the sake of expecting it to make a huge difference to your machine. However I guess that depends on what you have in there at the moment.

I currently run a 3.0ghz dual core overclocked to 4.02ghz with DDR2 800mhz RAM. I looked into DDR3 myself only weeks ago and found that it's not worth getting until I change my cpu/motherboard combo.

I have 2 x 1GB DDR2 667mhz at the mo

[QUOTE=Craig_H;396904]MY REXTC; what ram do you have in there now?

You won't notice any difference going to DDR3 ram on your dual core. Sure, if you benchmark it and read the numbers there will be a gain, but nothing that will be overly noticeable when using your applications. DDR3 will show a bit of an improvement with Quad Core cpu's and larger caches, etc.

I would definitely buy DDR3 if you *need* new RAM now, as you'll obviously carry the RAM over to your next cpu/motherboard upgrade. I wouldn't buy it just for the sake of expecting it to make a huge difference to your machine. However I guess that depends on what you have in there at the moment.

I currently run a 3.0ghz dual core overclocked to 4.02ghz with DDR2 800mhz RAM. I looked into DDR3 myself only weeks ago and found that it's not worth getting until I change my cpu/motherboard combo.[/QUOTE]

I run an E8400 @ 4.4ghz on water cooling.....(1950mhz fsb!)

Even going from ddr2-800 to ddr2-1066 is a significant increase in memory bandwidth.....I.e 25%!

[QUOTE=Rossco;396917]I run an E8400 @ 4.4ghz on water cooling.....(1950mhz fsb!)

Even going from ddr2-800 to ddr2-1066 is a significant increase in memory bandwidth.....I.e 25%![/QUOTE]

Don't make me go and spend unnecessary money :icon_lol:
Everything I've read said not to bother changing RAM (DDR2 vs DDR3) when it came to the dual cores. Just end up with bottlenecking, etc.

I'm running my E6850 @ 4ghz on air. Grabbed a Noctua last week and decided to reduce its lifespan since I might upgrade around xmas/New year. Thinking of getting an i5 since they're cheap at the moment, and overclocking the buggery out of it.

I'm kinda stuck with the MB I have at the moment, an Xfx 780 - 3 way SLI .

I'm running 2 x 8800 gt's for display & a 9600gt for physics/number crunching......

I'm going to go to Windoze 7 in the new year and I'll probably throw a quad core in it then too.

correct me if im wrong, but wont the computer only recognise 3GB of ram if you are using a 32bit operating system?
if you buy 4 gb of ram you need a 64bit OS or else it will only use 3gbs of your 4gbs

^^ Correct ^^

With matched sticks being sold as 4 gb pairs of 2 x 2gb what can you do?

[QUOTE=Rossco;396951]^^ Correct ^^

With matched sticks being sold as 4 gb pairs of 2 x 2gb what can you do?[/QUOTE]
DDR3 3 x 1gb sticks, triple channel :P but yeah ram is so cheap now its no biggie