Power for a GTX 770
- Thread starter Tom Clark
- Start date
Solution
Andrew Rohlfs
Honorable
- Aug 12, 2013
- 91
- 0
- 10,640
Yes.
Edit: unless you want to overclock. The min requirement for that graphics card is 600w
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-770
Edit: unless you want to overclock. The min requirement for that graphics card is 600w
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-770
nukemaster
Titan
- Nov 23, 2004
- 19,626
- 6
- 74,965
If you ran 2 660's fine than the single 770 should not be an issue.
We have to watch out about 42 amps on a single rail. It would be 42 amps combined across all rails(for the full system) as NO single gpu video card needs 42 amps @ 12 volts since that is 504 watts.
The top end wattage is also not as important. A 550 watt power supply with 42 amps @ 12 volts would be just as good as a 600 watt if both have the same 12 volt current.
You only have to watch out for the older power supplies that did not place so much power on the 12 volt rail. So many older units marked as 600 watts(they are, just a good portion is on the 3.3 and 5 volt rails) may have less power than a modern 400 watt unit.
Modern units on the other hand turn almost all of the power into 12 volts and get the 5 and 3.3 rails from the 12 volt rail via DC-DC converters(high speed/high efficiency switching regulators). This allows modern power supplies to deal with heavy 12 volt loads as well as moderately heavy 5 and or 3.3 loads as long as the 12 volt load is kept lower. This is the reason a power supply has a MAX combined on all rails.
Multi rail power supplies tend to just be current limiters built into a single raid power supply anyway. In very rare cases it may be an issue, but not with most designs.
We have to watch out about 42 amps on a single rail. It would be 42 amps combined across all rails(for the full system) as NO single gpu video card needs 42 amps @ 12 volts since that is 504 watts.
The top end wattage is also not as important. A 550 watt power supply with 42 amps @ 12 volts would be just as good as a 600 watt if both have the same 12 volt current.
You only have to watch out for the older power supplies that did not place so much power on the 12 volt rail. So many older units marked as 600 watts(they are, just a good portion is on the 3.3 and 5 volt rails) may have less power than a modern 400 watt unit.
Modern units on the other hand turn almost all of the power into 12 volts and get the 5 and 3.3 rails from the 12 volt rail via DC-DC converters(high speed/high efficiency switching regulators). This allows modern power supplies to deal with heavy 12 volt loads as well as moderately heavy 5 and or 3.3 loads as long as the 12 volt load is kept lower. This is the reason a power supply has a MAX combined on all rails.
Multi rail power supplies tend to just be current limiters built into a single raid power supply anyway. In very rare cases it may be an issue, but not with most designs.
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