PSU for HD5770 Crossfire


I have adquired a new XFX HD5770 1GB and a new Motherboard Gigabyte EP45-UD3P which have two PCI-E for Crossfire...

I want to buy another HD5770 but I dont Know if my PSU could run the Crossfire well...

My PSU: Cooler Master Silent Pro M600

In the AMD page, Crossfire section in the Certificate Products, it says that my PSU support a crossfire with two HD4870x2 but I didn't see something about the HD5770... I read somewhere that the 4870 need 150W and the 5770 just 108... But I have 40A on a +12V single rail with 2 6+8 pin, I don't know if that could be a problem...

Could I run whit any problem two HD5770 on my PC???

My PC:
Silent Pro M600
Gigabyte EP45-UD3P
RAM: 3 GB Kingstom
Core 2 Duo E8500
XFX HD 5770

8 answers Last reply Best Answer
More about hd5770 crossfire
  1. Best answer
    40a on the +12v rail. Each HD5770 will use 11A, your CPU will use 10. You're more than fine.
  2. Check out this calculator

    Your PSU will be more than enough for supporting 5770 CF. :)

    Use the calculator above to "do the math" for you ..... "System Requirements" tend to be a bit conservative so as to allow for the cheapo PSU's.
  4. Thanks to all... In the calculator appears that I just need 317W for my PC (including the crossfire)... I didn't thought that my card just need 11A, however I'll buy first an ATX because mine is too small, my CPU cooler don't let me close the ATX and my HD will be too close to the second video card... But in two months I'll buy the card and I hope the crossfire worth it, beacause I can't play Metro 2033 on the max settings... :D
  5. ^All the best for the upgrade :)
  6. IMHO, it is ALWAYS a mistake to use the smallest PSU possible. Rather I suggest using the highest wattage QUALITY PSU you can afford. It's the cheapest insurance policy you will ever buy.
  7. Best answer selected by Mortishead.
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