x1650pro agp power consumption?

Taylor85 · Nov 5, 2007, 09:42 PM

Hi,

Does anybody know the exact power consumption of a Radeon X1650pro AGP 512 MB graphics card? How much ampere does it use (when fully loaded) on each rail? Because I don't want to buy a power supply that turns out to not be enough for my pc.

Thanks in advance.

Dyre Straits · Nov 6, 2007, 03:20 AM

If you get a PSU that produces 30A on the +12 Rail/s, that should be ample power for about any card you get down the road. At least for the near future.

Taylor85 · Nov 6, 2007, 10:02 AM

So you're saying that a psu with either one 12V rail of 30A or two 12V rails with a combined 30A will be enough?
So the other rails don't matter that much? Or will a psu with that much ampere on the 12V rail most probably have good ratings on the other rails because it's a "good" psu?

EDIT: I have another question: when I look at the specifications for some psu's, they list high ampere ratings on all rails, but when I calculate the power from these ampere ratings I get a much higher number then they say the psu can handle.

For example, the Eminent EM3900, a 550W psu. Lists DC output: +5V=40A, +12V1=16A, +3.3V=35A, +12V2=18A, -12V=0.8A, +5Vsb=2A. When I add the first four up, i get: 5*40 + 12*16 + 3.3 * 35 + 12 * 18 = 723.5! This is almost 200W too high. Are these peak amperes? Or do they mean that it can take this much amperes for a particular rail only if the other rails are not at maximum, such that the total power is 550W?

Damn, I always thought psu's were "dumb" devices, but they're actually very complicated!

Dyre Straits · Nov 6, 2007, 12:06 PM

Unless you absolutely have to have one, I'd avoid any Dual Rail PSUs. Although this article I'm linking to is a little old, it might give you some insight as to what to consider:

Single rail PSU solves RD480 Crossfire problems - The INQUIRER

Taylor85 · Nov 6, 2007, 01:46 PM

I don't think I need a dual rail psu (my motherboard is rather old) but it's almost the only kind I can find. I have found some single rail psu's but they were rather expensive.

My computer is not really high-end (for example the graphics card is the most modern device in it), it shouldn't be necessary to buy a very expensive psu. Also not a cheap one by the way, because they seem to put every watt in their lower voltage rails :s.

Nov 5, 2007, 09:42 PM	#1
Taylor85 DriverHeaven Newbie Join Date: Nov 2007 Posts: 10 Rep Power: 0	x1650pro agp power consumption? Hi, Does anybody know the exact power consumption of a Radeon X1650pro AGP 512 MB graphics card? How much ampere does it use (when fully loaded) on each rail? Because I don't want to buy a power supply that turns out to not be enough for my pc. Thanks in advance.

Nov 6, 2007, 10:02 AM	Thread Starter #3
Taylor85 DriverHeaven Newbie Join Date: Nov 2007 Posts: 10 Rep Power: 0	So you're saying that a psu with either one 12V rail of 30A or two 12V rails with a combined 30A will be enough? So the other rails don't matter that much? Or will a psu with that much ampere on the 12V rail most probably have good ratings on the other rails because it's a "good" psu? EDIT: I have another question: when I look at the specifications for some psu's, they list high ampere ratings on all rails, but when I calculate the power from these ampere ratings I get a much higher number then they say the psu can handle. For example, the Eminent EM3900, a 550W psu. Lists DC output: +5V=40A, +12V1=16A, +3.3V=35A, +12V2=18A, -12V=0.8A, +5Vsb=2A. When I add the first four up, i get: 540 + 1216 + 3.3 * 35 + 12 * 18 = 723.5! This is almost 200W too high. Are these peak amperes? Or do they mean that it can take this much amperes for a particular rail only if the other rails are not at maximum, such that the total power is 550W? Damn, I always thought psu's were "dumb" devices, but they're actually very complicated! Last edited by Taylor85; Nov 6, 2007 at 10:48 AM.

Nov 6, 2007, 01:46 PM	Thread Starter #5
Taylor85 DriverHeaven Newbie Join Date: Nov 2007 Posts: 10 Rep Power: 0	I don't think I need a dual rail psu (my motherboard is rather old) but it's almost the only kind I can find. I have found some single rail psu's but they were rather expensive. My computer is not really high-end (for example the graphics card is the most modern device in it), it shouldn't be necessary to buy a very expensive psu. Also not a cheap one by the way, because they seem to put every watt in their lower voltage rails :s.