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+12V@XXAmps For 6800GS/7800GS

post #1 of 12
Thread Starter 
i'm going to get a 6800GS or perhaps 7800GS . my PSU has only 14Amps On +12V . i'm going to get a new PSU . how much power does these cards need ? and I'm no longer using persian PSUs . so , which brand is good ? may you referr me a good PSU with 20pin power connector ?
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post #2 of 12
You can get a PSU with a 24pin connector if you can get hold of an adapter to convert it to 20pins. They should be available even where you are.

How much money do you have to spend? On a tight budget a PSU like mine will do fine on your system - 480W and 34A on +12V. You would want something over 450W (constant power, not peak) and 30A or so on dual 12V rails.

Some of the best PSUs around right now are:

Seasonic S12 500W and 600W
PC Power and Cooling Turbo Cool 510W
OCZ PowerStream 520W
Fortron (FSP) Epsilon 600W and 700W
post #3 of 12
Thread Starter 
I don't have a good computer and my computer doesn't need more than 500watts . this is the last part i'm going to get for my computer . i'm waiting for AMD M2 . where I can find your PSU's tech info ? thanks
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maxtor 160GB IDE Vista Ultimate CRT F700P Farassoo FCR-8800 
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post #4 of 12
This is my PSU. I don't know if you'll find it over in Iran or not. Its the best cheap PSU you can buy

480W (530W peak)
+12V1 @ 18A
+12V2 @ 16A

It has a 24pin power connector, but it comes with a 20pin adapter.
post #5 of 12
Thread Starter 
you are right . i can't find it on iran
what is peak load ?
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post #6 of 12
Peak power? That is 530W.

If you can't find that particular PSU something around that specification will be fine for your system.
post #7 of 12
Thread Starter 
I don't know what is peak power
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My System
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CPUMotherboardGraphicsRAM
XP 2500+ barton Gigabyte GA-7VAXP Ultra fx5200 278/378 ddr266 512MB 
Hard DriveOSMonitorKeyboard
maxtor 160GB IDE Vista Ultimate CRT F700P Farassoo FCR-8800 
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post #8 of 12
Thread Starter 
do you know how much amps does 7800gs need ?
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maxtor 160GB IDE Vista Ultimate CRT F700P Farassoo FCR-8800 
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post #9 of 12
Peak power is the highest amount of power the unit is capable of outputting. It is rated to give a constant 480 watts of power, but that will not remain at 480 all the time, it will fluctuate. The highest it can go (the peak) is 530 watts.

Your PSU at the moment says 430W, yes? That is more than likely its peak power rating, the highest it can put out, but will not put out constantly. The 'better' PSU manufacturers/resellers list the constant power, that is the figure that really matters. If your system draws 400W then it is no good to have a 450W peak power PSU if its constant power output is below 400W
post #10 of 12
I have a FSP 450w psu w/ dual 12v rails, 18a each. that would do it for you. (model number in my sig) but I got that psu for 56 shipped from newegg. if you can find it... it'd be a good budget psu
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