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GPU not detected after CPU and MoBo upgrade

arkejn
Level 7
Recently I upraded my PC (one in signature) with Crossblade Ranger and A10-7700K. After reinstalling system and stuff, I wanted to plug in my GTX 460 to new MoBo and nothing happend, in BIOS it's not detected, device manager also don't see it. What may be the cause. Can't check if it's fault of PCIE slot or GPU's. I have (yet, waiting for new case to arrive) no space in my case to try second PCIE slot, and have noone near who could borrow me a GPU. maybe when changed MoBo from M4A9XTD which had 4 pin power supply for CPU to Crossblade which has 8pin CPU power suply, my PSU (600W) is too weak now to power up GPU? Fan on GPU works.This week I will have 850 W PSU.
STATION WAGON PC:
CPU
: AMD Phenom II X6 1100T BE / A10 7700K MOBO: ASUS M4A79XTD EVO / ASUS Crossblade Ranger
COOLING: Coolermaster V8 PSU: Chieftec 80P 600W / Corsair RM850
RAM: Kingston HyperX T1 2x4GB DISK: Seagate 1TB, WD Green Caviar 1,5TB
CASE: Cooler Master Elite 330 / Corsair Carbide SPEC02 VIDEO: Asus GTX460 1GB DCU/TOP

G56JR
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