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Might be enough but better to go 1000 or 1200w IMO

Psu work most efficiently and quietly at around 50% load. Your rig will probably pull more than 450W so you will be running the 900W psu under a lot of load.

It will work, but better to be safer.
 
Before you get the 2 9800GX2's aswell unless you are getting each one for under £200 I'd seriously look at other cards.

9800GX2's are a BAD idea unless you are getting them for - £200
 
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Is it only me or this guy only choosen the most expensive components without knowing a jack about their performance ? ;).

One big waste of money, could build better system for half the price with just very very slight OC.
 
i have a 32" @ 1920×1080 and i'm getting a 22" @ 1680x1050 and i do know what i am doing i hope :D. i am asking a lot of questions as i dont wan make any mistakes when it come's to putting it all together
 
I hope your not planning on running Dual Screen on SLi, as SLi can't do it, 3x of your cards will have to be disabled, so you will only be running a single GTS downclocked to GT speeds on Dual Screen.
 
This is such an anti Nvidia form :P

Srs, 9800GX does have problems specficially with quad SLI, and this whole mirco stuttering thing which is a bit of an irritation when you spend £600+ on video cards.

Martyn
 
Gino said:
i have a 32" @ 1920×1080 and i'm getting a 22" @ 1680x1050 and i do know what i am doing i hope :D. i am asking a lot of questions as i dont wan make any mistakes when it come's to putting it all together
Click to expand...

I'd make sure that they are delivering what you hope they are....IIRC, SLI means that you can only use the memory from a single card...so assuming that you want lots of MSAA and AF at those res, you might find that they are memory bound by the 512Mb.

There was an excellent post recently (can't remmeber by whom) on the problems with high res gaming and why the 280 was considerably better than the 4870 even if the latter was in crossfire, and the main reason was the 280 had enough memory and bandwith to swap the textures in and out without needing to fall back on system ram.

Also, if you are thinking of gaming at a high res in the future, then the GX2s will definitely be a terrible buy for the reasons noted above.
 
Get 2 x ATI 4870

Intel based mobo like the DFI X48:
http://www.overclockers.co.uk/showp...(Socket LGA 775) PCI-Express DDR2 Motherboard

Just got one and they are superb it will takes you ages to unlock all the overclocking potential though as you can adjust so many aspects of your entire system.

For CPU the Q9450 should be fine although if you really want 2 x 9800GX2 then you need something faster like a QX9770 unless you plan on a heavy overclock on your Q9450 with extreme cooling. The bottleneck becomes the CPU in highend multigpu systems.

You can save a lot of money by scaling back a little and the performance is not much different.

You do realise that no multigpu system ever gives you 100% extra performance for the 100% extra cost don't you?? This is because of system overheads to manage multiple cards at once and assign the different cards different frames to render etc etc.

ATI4870 under Crossfire scales a little better than Nvidia's SLI in any case you will always find a lot of games do not give huge FPS benefits with more than 1 graphic card.

Unless you have a 30" TFT @ 2560x1600 anyway it is a waste of money as for a lot less than 2 x 9800GX2 you can get high FPS if your TFT is only 1920x1200.
 
for 22 " monitor why just not get one 4870 which is much better then 8800gtx/ultra and competes with 260 and etc... then sell it when 4870x2 comes out or just wait in general till 4870x2 comes out much better performance then two 9800gx2
 
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