Help with motherboard and PSU for Crossfire ATI Radeon 3780X2

[husher]

Hello guys. What kind of motherboard would you prefer for my Crossfire? My Crossfire will be two * ATI Radeon 3780X2

(Btw my RAM will be ddr2 pc 8500 1033 mhz - processor= Core 2 Quad)

What kind of a power supply for these graphic cards?

 

[husher]

And of course I mean ATI Radeon 3870X2 not 3780X2

 

[Soul59]

See signature. Over 17,000 3dmark 06 with this configuration.

 

[mi1ez]

Go for most any board with an Intel chipset that supports 2 16xPCIe slots. Probably the X38 as Soul said.

 

[bobwya]

Hello guys. What kind of motherboard would you prefer for my Crossfire? My Crossfire will be two * ATI Radeon 3780X2

(Btw my RAM will be ddr2 pc 8500 1033 mhz - processor= Core 2 Quad)

What kind of a power supply for these graphic cards?

I am a DFI fanboooi, so hows about:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813136042
Note: I haven't used this board personally but the fact that there are NO negative reviews about this on NewEgg (very unusual). OK so its v. f. expensive but you get what you pays for!! The cheaper DFI boards do not support dual PCIe 16x which is what you need for Crossfire 3870X2. Have AMD released a Catalyst driver supporting Quadfire (or whatever it is called) yet?? I would have bought that card if I didn't already have a 8800GTX... Ah well!!

DFI customer support is really hot. I got a 2nd hand DFI Lanparty UT NF4 socket 939 board second hand on Ebay - no motherboard I/O plate or audio raiser module. Its obsolele right - so I thought I'm screwed. I managed to find a firm in the US that sold the I/O plate - no sign of the audio riser though... I emailed DFI as an afterthought... They emailed back the next day and had the audio module and I/O plate mailed out to me free of charge within 7 days!!

DFI boards when new need to iterate through a few BIOS versions before they are 100% stable - but after that they are the bees knees... I have built up 3 systems now for other folks using DFI boards - they require 0% support with hardware stability even when OC!!

RE power requirements:
http://www.extreme.outervision.com/psucalculator.jsp
Note that 1x 3870X2 draws about 150Watts (with no OC) so you will need a good Tier 1 or 2 PSU with at least 550Watts to power 2x 3870X2.

Take your pick off:
http://www.xtremesystems.org/forums/showthread.php?t=108088
I would personally recommend: PC Power & Cooling, Ultra X3, Enermax Liberty series or Hyper series > 650Watts (lower rated modules are NOT Tier 2). Modular is good - especially the Hyper series which uses lower resistance DIN plugs...
I gather Corsair PSU's are really sh** hot as well (they get recommended a whole lot on THG).

Anyway.. nice choice of card... good luck!!

Bob

 

[husher]

Thank you for the good advice