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can a 450w/500w dual rail psu with 18amp on one of its rail handle a 6870/6850/gtx560?
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can this handle a 6870/6850/gtx560
- Thread starter raident30
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OP
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- #3
This is the psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817104097
FSP group isnt bad. I cant see the rating total on the 12v rail, but it should still be fine having in the ballpark of 36A combined.
OP
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Sir can u explain to me the difference between a single rail 34a and a dual rail with 18a each totaling 36a.... Thanks
Well, first, you do not add rails up to get the total output (note I said, 'ballpark').
Otherwise that answer can be found in the stickies here in the PSU section
. Well it would be HERE if this thread was put in the right section (Power Supplies)... Let me link it: http://www.overclockers.com/forums/showthread.php?t=548862
Otherwise that answer can be found in the stickies here in the PSU section
. Well it would be HERE if this thread was put in the right section (Power Supplies)... Let me link it: http://www.overclockers.com/forums/showthread.php?t=548862
OP
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Ive got a last question. If the gpu requires a 400w psu with a 24a on the 12, yet i have a 500w psu dual rail with an 18a on one 12v. Will it provide enough power under load? Sorry for asking but i didnt find the answer to this question on the link you provided.
OP
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Thanks!
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- Aug 11, 2008
See the "Max Combined Power" in the pic below? It says 432W on the 12v rails. To get the amps on the 12v rails, you take the 432W and divide it by 12v. This happens to come out to 36A (which is 12v1 + 12v2), but that's not always the case. Many times, each rail has its own maximum rated amperage, but the PSU can only put out less than the rails' rated amperage combined.
Also, your GPU doesn't require 400W and 24A, that's just recommended wattage and amperage for an entire system.
HD6850 = 127W (127W/12v = 10.58A)
HD6870 = 151W (151W/12v = 12.58A)
GTX560 = 150W (150W/12v = 12.5A)
Also, your GPU doesn't require 400W and 24A, that's just recommended wattage and amperage for an entire system.
HD6850 = 127W (127W/12v = 10.58A)
HD6870 = 151W (151W/12v = 12.58A)
GTX560 = 150W (150W/12v = 12.5A)
OP
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Wow matt! thanks for that simple and thorough explanation. So meaning, i can provide enough power even for a 560ti or 570 right?
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- Aug 11, 2008
GTX560 Ti should work fine, but I don't think I'd go with the GTX570 because, also on the label, it says that 12v1 is for the CPU and 12v2 is for the MB/Accessory/PCIe.
If the amperage is spit up evenly across the rails, then that means you'll have 18A for the CPU and 18A for the MB/HDD/ODD/Fans/GPUs. The GTX570 needs 219W/12v = 18.25A at stock.
If the amperage is spit up evenly across the rails, then that means you'll have 18A for the CPU and 18A for the MB/HDD/ODD/Fans/GPUs. The GTX570 needs 219W/12v = 18.25A at stock.
OP
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Oh alright thanks! Just tested my luck... Il go with the 560ti!
OP
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planning to have, 1 hdd 1 odd, 2 2g ddr3ram 1333mhz, 4 case fans
But is that a true dual rail PSU? i dont know... some (a lot) just say its split but the reality is there is no OCP/OVP on any of the rails so each rail can take the full rated power if needed.
