[HansHansen]

hey guys,

i finally managed to get a cheap, but really good pc system together.
i

[HH_Cipher]

For Cross fire, I would of thought they would of recommend a PSU amount...

[Pirate]

HI HansHansen, I would suggest you aim a bit higher than 650w, maybe 850w. They are going to be a bit more expensive than 90 euros but its is highly recommended you don't skimp on the PSU. If you are aiming to get a 2nd card in the future then you should make sure that the PSU has 2 sets of 6 and 8 pin PCI-e rails. Not too sure which one to recommend as the one I just bought is designed specifically for the case.

Oh, and good choice on the monitor, I have the exact same one and I love it!

I just ordered my new system today... and I'm still in shock that I spent so much money, but it should be a bit of a beasty.

Antec P183 Case
Antec CP 850w PSU
Intel Core i7 920 D0 Stepping 2.66 - overclocked to 4.0Ghz :lol:
Noctua NH-U12P SE1366 CPU Cooler
Gigabyte EX58-UD5 Intel X58 DDR3 Motherboard
OCZ Reaper 6GB (3x2GB) DDR3 PC3-15000C9 Tri-Channel
Gainward GeForce GTX 295 1792MB GDDR3
Samsung SpinPoint F1 1TB x2 - Raid 0
Creative Sound Blaster X-Fi Xtreme Gamer 7.1 Sound Card

Can't wait for it to all arrive, Building it is going to be so much fun!

[HansHansen]

thx for your help

@pirate: WOW your system did cost about 1500-2000

[Pirate]

It was

[GeneralPsycho]

heya hans!

Great build!

As for PSU, I totally agree with Pirate on wattage, 650 watts may not be enough, so sticking to 850 watt or even 750 watt is a great choice for your system, even in SLI/Xfire.

Just make sure that you take a look at good brand PSUs because a bad quality PSU can kill your PC

Enjoy flying!

[RAF_OldBuzzard]

A CORSAIR 620HX or 650TX, will run MOST 2 card Crossfire set-ups. I wouldn't try running 3870 X2s or 4870 X2's in crossfire, but for any of the sincle GPU cards in Crossfire it should be adaquate.

If you want a little 'cushion', then either the 750TX or 750HX would run any 2 card Crossfire setup including the X2's.

If you are going to run 3 cards in Crossfire then you would need to go with either the 850TX, 850HX or 1000HX.

I'm specifying CORSAIR because they are as good a PSU as you can get quality wise. There are a bit costly, but you get what you pay for.

Just in case you don't know, the TX series are standard PSUs. The HX series are modular, and do cost more than the TX series.

One thing to remember is that while wattage IS important, the AMPS on the +12v rail(s) is MORE important. The newer video cards require a lot of AMPS, and if the PSU can't supply then it's worthless, no matter how high the wattage is.

We have 3 systems here at home and all of them have CORSAIR PSUs. Two gaming systems with 620HXs, and a low end system with a 400CX. All of them have been flawless.
My system is: Phenom II X4 940, 8GB RAM, 3 SATA HDDs, I SATA CD-DVD, 1 FLOPPY with integrated card reader,, 3870 X2 video card, X-Fi Platinum sound card with the (powered) front bay, 3 120mm fans, and a Koolance Exos2 which is also powered bu the PSU. My 620HX handles all of that with ease.

[randomaccess]

700w will do you fine for crossfire but if you want to be safe rather than sorry then you may find stretching your budget slightly to get a 800w psu would be best.
:wink:

P.s. A well known tip is that if a psu is light then its bad quality and if it feels heavy its good quality, thats why if you pick up say a corsair psu it will be like holding a brick. 8)

[Guest]

700w will do you fine for crossfire but if you want to be safe rather than sorry then you may find stretching your budget slightly to get a 800w psu would be best.
:wink:

P.s. A well known tip is that if a psu is light then its bad quality and if it feels heavy its good quality, thats why if you pick up say a corsair psu it will be like holding a brick. 8)

Good info, but it might be a bit late in the day...

[randomaccess]

Ya probably, oh well.:-? And thx