First ever System Build.

[blue_opal]

Hey guys, this is my first time posting here, I have always wanted to build my own PC and now i have a chance, i would just like to know what you guys think of the specs and whether or not all the parts work well together.

Motherboard: Asus P8Z68-V PRO
Processor: Intel i5 2500k
RAM: Generic 4GB
Graphics: Sapphire 6850 Toxic
Harddrive: Generic 1TB
Powersupply: Antec 620 W
Case: Cooler Master Haf X

Is the power supply enough?

Am I better sticking with the sapphire toxic or just going with the regular 6850?

If i was to overclock the CPU would I need a third party cooler or is the stock cooler good enough?

My budget all together is about £750, i still havent decided on the RAM and HDD but I just going to go with basic ones.
Thanks, Regards.

 

[blue_opal]

Nice that seems to work perfectly, one other thing what are the differences between the MSI P67A-GD65 and the Asus P8Z68-V PRO? should i squeeze the budget and pay a little extra for the Asus or will that msi board do?

 

[blue_opal]

Those look great, thanks for the help ill probably getting everything by the end of the month and start the build, once again thanks for all your time.
Regards