General upgrade

Hi all, first post.
O.K so I am an oldie but wish to upgrade my computer, I have a basic working knowledge!!!! I have a custom built Gigayte Triton Corsair 550w power Intel core 2 quad 2.4 ghz socket Corsair twin 2x 6400ddr 2 AtI 1650 graphics
card 500gh SATA H/D running vista basic, From what I understand I cant add more memory? I wan't to upgrade to a decent graphic card HD seems to be the in thing but I don't run a HD monitor. Even at my age I am a Games fanatic keeps the memory ticking over!!!!!!!!!

ok u wana upgrade:

What games do u play or would like to play?
what is you budget?

if u CPU is an intel core 2 quad 2.4 Gz its likely the q6600 now really an upgrade for that would be an i5 or better to make it worth it. but the q6600 is still good and can OC to least 3 Ghz

As for the graphics card look at the recent articals toms hardware runs on best GPU for price and pretty much buy the best one u can afford.

HD means nothing for monitors just get the fastest gaming gard u can afford by nvidia or ATI.

Unless u wana use ur PC as a Media centre for ur TV and link the sound though the card via the HDMI cable in which case an ati card may be better but otherwise it doesnt matter

That's a pretty up-to-date motherboard and you have a quality PSU so upgrading to pretty much any single GPU graphics card won't be a problem. I'm assuming the PSU is the VX550? If so it has 1x 6pin PCIe power cable and 1x 6/8pin PCIe power cable which will be needed for higher powered graphics cards. 8GB of RAM is plenty and it looks to be be quality stuff.

Now to the nitty gritty!

What resolution does your monitor run at, what games do you play and what is your budget?

We can probably recommend you a drop in upgrade.