How many amps am i getting from my PSU? (With picture)
12 replies, posted
[t]http://i.imgur.com/aGTO1.jpg[/t]
I can't quite understand it, is it saying i have 4 12V rails? Would i be correct in thinking i have 72 amps in total for my graphics card?
Many thanks.
You only use one rail per connector, so that's 18A.
That's the maximum you can get, if you have equal load on all 4 rails, you'll get 8.85 on each rail at average.
This is why having separate rails just confuses things.
The rails might feed separate PCIe or CPU cables, But don't combine together unless the GPU is able to draw from every rail.
Think of them as separate subsystems in the PSU.
I've had the PSU a while, but I've been thinking about getting an EVGA GTX 680, And it says 'minimum recommended power supply with +12 Volt current rating of 38 Amps.'
So i guess mine doesn't cut the mustard?
Nope, the power rating is not high enough.
Try 800-1000W.
[QUOTE=VistaPOWA;35891924]Nope, the power rating is not high enough.
Try 800-1000W.[/QUOTE]
uhh no
[url]http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/25.html[/url]
By the way:
V12_1+V12_2...+V12_n / Power rating for all 12V rails = Amperage at full load on every rail
P (Power) / U (Voltage) = I (Amperage)
I * U = P
[editline]9th May 2012[/editline]
[QUOTE=reapaninja;35891985]uhh no
[url]http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_680/25.html[/url][/QUOTE]
Power consumption has nothing to do with this.
I have the right amount of watts, but not enough amps.
A GTX680 will work perfectly fine on that.
[editline]9th May 2012[/editline]
seriously please ignore vistapowa, he's pretty illiterate
[QUOTE=Adamhully;35891847]I've had the PSU a while, but I've been thinking about getting an EVGA GTX 680, And it says 'minimum recommended power supply with +12 Volt current rating of 38 Amps.'
So i guess mine doesn't cut the mustard?[/QUOTE]
That's for the whole system. A GTX680, relatively speaking, sips power. You will be fine on a single rail, though I bet the rails are split accross both the 24pin, 8pin EPS, and the 6pin PCIexpress.
if each rail has 18amps, that's 216watts per rail (It's not, but for sake of simplisity), and that's probably split across each of those, so you probably will have three rails feeding the GPU. The PCIe slot, the first PCIe power, and second PCIe power.
As far as rails go you have gobs of power feeding the card, but 75watts for the Slot, and 75 for each PCIe connector. The 680 has a TDP of 195watts. Giving you effectively about 230watts offered to the card via PCI Express standards. But the PCIe connections can support much more. People raise the GPU TDP to about 250 or more and the card will overclock accordingly.
You're fine, srsly.
Thanks man. That pretty much cleared it up for me :)
[QUOTE=Brt5470;35892273][B]That's for the whole system[/B]. A GTX680, relatively speaking, sips power. You will be fine on a single rail, though I bet the rails are split accross both the 24pin, 8pin EPS, and the 6pin PCIexpress.
if each rail has 18amps, that's 216watts per rail (It's not, but for sake of simplisity), and that's probably split across each of those, so you probably will have three rails feeding the GPU. The PCIe slot, the first PCIe power, and second PCIe power.
As far as rails go you have gobs of power feeding the card, but 75watts for the Slot, and 75 for each PCIe connector. The 680 has a TDP of 195watts. Giving you effectively about 230watts offered to the card via PCI Express standards. But the PCIe connections can support much more. People raise the GPU TDP to about 250 or more and the card will overclock accordingly.
You're fine, srsly.[/QUOTE]
The guide could've been clearer about that.
Some PSUs simply use multiple rails, and it can pose a problem if it's distributed in a dumb way - say PCI-E, 24-pin and 4+4 pin on one rail, Molex and floppy on the others. That would be incredibly dumb, though, and that is definitely not how it's distributed in this one. You'll be totally fine.
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