Guys i am upgrading my core 2 duo e7400 2.8 ghz to core i5 2500k 3.5 ghz..so i am also upgrading my pc mobo and ram and gpu too as its for gaming so should i also upgrade my power supply??
I agree with Kelly particularly because of the age of your old processor. Over time, power supplies become less efficient, ripple and other technical stuff that takes too much time to explain. If you have a Core2 CPU, you would definitely want a newer PSU.
As mentioned earlier I too would advise on a PSU upgrade. Try to purchase any SeaSonic, XFX, Antec, Corsair or EVGA PSUs. For the GTX 760, try to get at least a 500W PSU and you should be fine.
And can u tell which GPU is better??GigaByte GT 640 2GB DDR3 (GV-N640OC-2GI),,,GigaByte GT 640 2GB DDR3 (GV-N640OC-2GI),,Nvidia gtx 760ti 1gb ,,Nvidia Gtx 660ti 1gb,,r HIS 7770 iCooler 1GB GDDR5 (H777FN1G)...well this is for game cs go
Get a normal power supply like 450W-550W it will work for you. the price at regal center is 3500PKR for 550W you can go lower price if you wanna buy 460 cooler master like 2000RS olx is the option you have got now buddy !!