4870x2 and GA-EP45-DS3R

[SKYMTL]

No, that isn't normal. They should all go on and then completely shut off after the motherboard goes through its POST sequence.

[kawai]

So it seems that you are right that my power supply does not have enough juice to power the card. I tried my friends 750tx corsair and it boot up fine on my motherboard.

I'm currently looking for a 750 PSU to pickup. Do you have any recommendations ? I've been looking at the PC power and Cooling vs the 750tx, although a modular psu would be ideal for me.

I followed ars technica's guide and they said that the 625 Modu82+ was good enough for two 4870's.. :(. Two 4870's eat up more juice than one single 4870x2 so no way that is happening :S

[SKYMTL]

For a modular power supply, there are a few options depending on your price range.

Silverstone DA750:
Canadian Prices: SilverStone Technology - Silverstone Decathlon DA750 750W 20/24 Pin Power... - DA750

Silversont DA850:
Canadian Prices: SilverStone Technology - Silverstone Decathlon DA850 850W 20/24 Pin Power... - DA850

Antec Truepower Quattro:
Canadian Prices: Antec Incorporated - Antec Truepower Quattro 850W Power Supply ATX V2.2... - TPQ850

Silverstone Strider 850W:
Canadian Prices: SilverStone Technology - Silverstone Strider 850W power supply - ST85F


I would lean towards the Silverston DA850 PSU for its single +12V rail.

[kawai]

How is the antec signature 850?

HardOCP has a review of it here : [H] Enthusiast - Antec Signature Series 850 Power Supply

Nevermind it seems a bit out of my budget, ill take a look at Antec's True Power Quattro 850w

[SKYMTL]

Overpriced IMO.

[kawai]

So right now im trying to decide between the the antec Quattro 850w vs the tx750 corsair. I hear that the Quattro is louder? but it has modular vs the tx750. Which one is a better buy?

[SKYMTL]

I would say the Corsair.

[kawai]

I was taking a look at enermax website and saw that they offer different modular cables. there is a solo and dual pci-e modular cable seen here:

http://www.enermax.com.tw/admin/pic/...3562273509.jpg
http://www.enermax.com.tw/admin/pic/...1356382190.jpg

The ones that came with the retail box were only dual. Think if i run one solo pci-e cable from each plug on the psu (1-1) to the 6 and 8 pin it would solve my problem?

[cadaveca]

Don't buy enermax, PLS. I've lost all faith in then as a quality PSU manufacturer, even though I use 1000watt DxX PSU. IF I opened my PSU up and showed you the insides...


I think the corsair unit is a nice unit.

When it comes to Crossfire with 2900XT, or 4870x2, it is best to tr yto stay away form quad-rail units, unless 1000W or greater.

[kawai]

I have a hunch its actually a defective psu, i remember having this rebooting problem when i tested my friends 3870x2. Good thing i'm in markham area so ill be heading to Comtronic's HQ soon.