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should i need  a bigger power supply for a 7770 video card
 

mid tower case

AMD 1055T 2.80GHZ WATER COOLING TURBO ON NOT OVERCLOCKED
WINDOWS 7  64 BIT
1 TB
5770 1gb

GIGABYTE GA-770T-USB3
KINGSTON HYPERX from 8gb to upgrading to 16
700 WATT
with 2 displays 1440/900

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700 watts is huge for yout setup. Don't stress. ;)

Desktop - Custom watercooled R4E/i7 3930k/GTX 780 SLI/32gb 2400mhz DDR3/Xonar STX/OCZ V4 256gb RAID 0/24tb RAID 5

Laptop - Clevo P370EM - i7 3630QM/GTX 680M SLI/8gb 1866mhz DDR3/840 pro 256gb RAID 0/750gb mechanical

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You can if you want to but there's no reason why it's necessary.

 

In short - No.

Desktop - Custom watercooled R4E/i7 3930k/GTX 780 SLI/32gb 2400mhz DDR3/Xonar STX/OCZ V4 256gb RAID 0/24tb RAID 5

Laptop - Clevo P370EM - i7 3630QM/GTX 680M SLI/8gb 1866mhz DDR3/840 pro 256gb RAID 0/750gb mechanical

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700w can run your gpu. This psu could even run a 7950.

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