Hey
i want to buy new parts for my computer:
- Asus M4N98TD EVO
- AMD Phenom™ II X4 955

and i have a 9800gt and a friend have also one for me so i can use sli.

any suggestions for a 4gb ram kit and a Power Supplies ?

Yeah I can't say a bad word about antec PSUs

*waits for ironic explosion*

No? Oh well.

My Antec 750 is a lovely quiet and seemingly very efficient unit, running my gaming PC very nicely. The PSU is one thing you can't skimp on because its the only component that can kill EVERY part of your PC when a cheap component pops.

Definitely get the best CPU you can afford, if it stretches the budget by a little then consider it a worthwhile long term investment. 20 bucks extra for say 200MHz more might be just enough make the CPU last another 6 months before it becomes intolerably slow. I was running a P4 2.8ghz and I got a hell of a good life out of it but by the end of its life, it was struggling a little in a way that my mate's 3ghz wasn't.

I'd suggest doing some research on SLI before you set it up, it can be a bit fiddly with some games

What other expansion cards are you likely to use? You might have some trouble if you have two PCI's since the first video card will block one slot (I assume the 9800GTs take up 2 slots, been years since I've seen one that doesn't), same with the bottom PCIE slot

Antec PSUs are very reliable and affordable. Corsair ones have a decent warranty and represent good value for money. Remember, you're going to need a bit more power if you're running the cards in SLI. But don't go insane and get a 1000W PSU or something stupid like that.

what's about bquiet!?

and how much Watt need i?

You might consider looking at 80plus.org Personally, I'm using one by Cooler Master and I'm happy with it. Probably not enough juice for what you're doing, but the 500w I get is more than enough for me. Haven't had it come up short yet.

Personally, I'd buy the RAM factory direct. Personally, I like http://www.crucial.com/index.aspx