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Could a modxstream pro 500w?

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January 27, 2012 2:43:46 AM

I have a modsxtream pro 500w, and i was wondering if it could handle a high end card like hd 69xx, tha fact is that the psu is dual rail and one handle the pcie and the other stuff but the motherboard and cpu, just 18amp will be enough for a high end card and periferics? correct me if i´m wrong. :( 

More about : modxstream pro 500w

a b ) Power supply
January 27, 2012 2:58:53 AM

Yes, I think you should be good. Two rails make 36A.
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January 27, 2012 3:04:37 AM

but just one rail of 18 amp handle the videocard, the hdd, etc. so i think it´s not 36 amp in this case
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a b ) Power supply
January 27, 2012 3:14:38 AM

Your card will take two PCIe power plugs, EACH with 18A and each on its own rail, so you'll be fine.
http://www.overclockers.com/forums/showthread.php?t=548...
Read carefully. It really spells it out farther down: "The bottom line is, for 99% of the folks out there single vs. multiple +12V rails is a NON ISSUE. It's something that has been hyped up by marketing folks on BOTH SIDES of the fence."
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January 27, 2012 3:33:08 AM

The thing is that i don´t want to overload a rail, because like it explains here:
"Typical multiple +12V rail configurations:
2 x 12V rails
Original ATX12V specification's division of +12V rails.
One rail to the CPU, one rail to everything else.
VERY old school since it's very likely that "everything else" may include a graphics card that requires a PCIe connector.
Typically only seen on PSU's < 600W."

Can i run "everything else" and a video card like the hd 6950 with that rail of 18amp? I may sound like flying around in the same thing too much but I want to be pretty sure about this, :( 
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Best solution

a b ) Power supply
January 27, 2012 11:39:37 AM

This is not a "very old school" PSU. This is a modern piece of equipment designed to run high-end graphics hardware. You can run the 6950 on the two 18A rails, and you can run everything else on the same two 18A rails.
The card's recommended amperage covers the entire system, not just itself. It should draw something like 18 or 20 off the two rails, leaving plenty for the rest of the system.
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a c 243 ) Power supply
January 27, 2012 12:00:41 PM

pit_1209 said:
The thing is that i don´t want to overload a rail, because like it explains here:
"Typical multiple +12V rail configurations:
2 x 12V rails
Original ATX12V specification's division of +12V rails.
One rail to the CPU, one rail to everything else.
VERY old school since it's very likely that "everything else" may include a graphics card that requires a PCIe connector.
Typically only seen on PSU's < 600W."

Can i run "everything else" and a video card like the hd 6950 with that rail of 18amp? I may sound like flying around in the same thing too much but I want to be pretty sure about this, :( 

One rail to the cpu and motherboard, one to everything else, you said so yourself in the OP.
The card will draw power from the slot on the motherboard, hmm power from both rails what a concept.
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a b ) Power supply
January 27, 2012 12:12:41 PM

The card draws power from the mobo slot (~75W) and from both PCI cables (~125W), which should each come from a different rail. What a concept?
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a c 243 ) Power supply
January 27, 2012 12:24:39 PM

kajabla said:
The card draws power from the mobo slot (~75W) and from both PCI cables (~125W), which should each come from a different rail. What a concept?

Dual rail psu.
1 rail to the native cables, 1 rail to the modular cables.
Both pcie cables are modular.
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January 27, 2012 3:23:49 PM

well, i´m feeling more secure now, i was a little worried about overloading a rail. :D 
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a c 158 ) Power supply
January 27, 2012 3:48:31 PM

I've been running an HiS 6950 with that PSU for 2 months without any issues. Other components:
1 SSD, 1 HDD, 1 DVD burner, 2 USB devices, MSI 870 G45, AMD Phenom II 720 BE, Corsair H80, 3 case fans.

YMMV but no issues for me.
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January 27, 2012 7:43:13 PM

that´s what i wanted, real facts, thanks. :D 
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January 27, 2012 7:44:54 PM

Best answer selected by pit_1209.
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