What is your fram rate?

[Buzzard7]

Then why in the world would you spec your cards to require 22-50 amps? Can somebody explain?

[SIK1]

The most a 650 watt power supply at 120volts can draw is 5.4 amps.

 

The question is how many amps it puts out on the 12v rail/s. You can have a 650w power supply that has one 12v rail that will supply 50amps. Remember that you are converting AC to DC

[BaldEagl]

The most a 650 watt power supply at 120volts can draw is 5.4 amps.

 

I think you mean 54 amps.  650 Watts/12 Volts = 54 amps.  And it's not what it draws, it's what it supplies.  Of course that assumes 100% efficiency which isn't possible.  An 650W 80+ certified power supply could provide 43 amps on the +12V rail(s).

[LLogann]

You Pass!!!   

I think you mean 54 amps.  Watts/12Volts = 54 amps.  And it's not what it draws, it's what it supplies.  Of course that assumes 100% efficiency which isn't possible.  An 650W 80+ certified power supply could provide 43 amps on the +12V rail(s).

If you don't mind me saying so, quite articulate in the response.  Even certified electricians would leave out the "not possible" part and only go with the math!!!   

[Buzzard7]

Thanks for explaining it. The 650w PS I am using is 80+ certified so it should be able to handle a 460 cards 42 amp requirements though it would be hard on it. I could probably stand to learn more about the inner workings of the PSU and how it makes that kind of power with only 120v input.

[W7LPNRICK]

My Dell Pentium Dual Core 3GB ram E2200 was very slow, then I found that Dell had configured this machine to use the dual processors separately. It was originally a 32 bit system. When I loaded the Windows 7 64 bit, all my problems disappeared. I can't for the life of me figure why they would want to run the CPU's separately...? 

[greens]

when i get back i dont wanna hear any yap about my frame rate, when i play it is a steady 63-69 fps. 

<S> greens

[Changeup]

How many 12 volt rails does your PS have? I have a 650w PS with a single 12 rail capable of of I think 52 amps. If your card can't draw the amps it needs from the 12 volt rail the PS is useless to it.
Looks like most of the 460 cards require 42 amps on the 12 volt rail.

Its a 700W PS but that doesn't mean much.  I have to look at the ratings label to see how that 700 is spread out.  Because of where the power is divided, it may not be sending enough to the card.  I will look this weekend.

I have anistropic and antialiasing controlled by the application....I don't think thats its unless its supposed to just be OFF.

OK - went and checked. I have no idea what this means:

Max combined load on +12V is 50A, 3V and 5V Not exceed 140W, Max Continuous Output 700W
+12V1/16A, +12V2/16A
+12V3/18A, +12V4/18A
+3.3V/24A, +5V/24A

[BaldEagl]

OK - went and checked. I have no idea what this means:

Max combined load on +12V is 50A, 3V and 5V Not exceed 140W, Max Continuous Output 700W
+12V1/16A, +12V2/16A
+12V3/18A, +12V4/18A
+3.3V/24A, +5V/24A

Your PSU manufacturer is claiming a total of 68 amps on 700 watts; an impossibility.  The most you could get is 58 amps but again only at 100% efficiency, another impossibility.  They likely rated the amp load under peak power output which may last for only a few seconds but it looks good if your trying to get a "high power" supply cheap.  In reality you're usually just getting a "cheap" PSU.

This leads me to believe you have a less than reputable PSU in your system and at that point there's no telling what kind of power your actually getting to your video card or how clean or stable that power might be.

I'm guessing your old video card needed less power than the new one.  Since that's the only thing that's changed in your system it's highly likely the flaws in your PSU are now showing themselves.  Continued underpowering of your video card will eventually burn out the PSU, the card or even the motherboard.

I'd highly recommend sticking with reputable PSU manufacturer's like Corsair or Seasonic who don't over rate their PSU's and are known for producing clean, stable power.  Yes, they cost more but you get what you pay for and your power supply is probably the single most important component in your computer.

BTW, you have 4 +12V rails.  There's been a lot of debate over what's better; single or multiple rails but I prefer a single rail PSU.  At least you know how it's wired and that the power you need will be there when you need it.  I use a 80+ certified (rated 83%) single rail PC Power and Cooling 750W (825W peak output) Silencer providing up to 60 amps (87% efficiency @ peak output).

[Changeup]

Eagle,

Thank you for helping me...on last question...please tell me which PS to go buy.  I will do it today.  I have a 680i LT SLI MB nVidia

[GreenEagle43]

i get a steady 70 frames all the time.

[Ping]

Happy to say a steady 59-60 FPS even in the thick of it.   

[Buzzard7]

Corsair builds a decent single rail 750w. TX750 is the name I think. That should be good for you Changeup. It will have the connectors you need for that card and board.

[jamdive]

I think you mean 54 amps.  650 Watts/12 Volts = 54 amps.  And it's not what it draws, it's what it supplies.  Of course that assumes 100% efficiency which isn't possible.  An 650W 80+ certified power supply could provide 43 amps on the +12V rail(s).

It draws at least 5.4 amps of 120v ac. It has to.

[DMGOD]

I love my 850w theraltake ps