Are these's part compatable?

[DECL4N]

CPU-Intel i5 2500k
MOTHERBOARD-ASRock Z77 Extreme4
GPU-Sapphire Radeon 6870/ Maybe x2 in future
RAM-Corsair Vengance 8GB
CASE-NZXT Phantom case
PSU-Powercool Modular 850w 80
and a 1tb hard drive and a dvd burner...

 

[g-unit1111]

Don't think I would touch that power supply. What kind of budget are you working with here?

Also if you're going Z77 go with the i5-3570K, if you're going Z68, stick with the 2500K.

 

[DECL4N]

How big a power supply do you think I would need for 2 of the 6870's and im going with the 2500k so what board would you you recommend around the same price range as the asrock z77?

 

[C12Friedman]

Welcome to Tom's Hardware Forums,
All of the parts you show are compatible but you have a weak link in your build - the PSU. I can find no objective reviews on any Powercool PSU, I found a few threads saying they had problems but nothing real good. I will personally suggest you steer clear of any PSU which has not been reviewed - see this list
http://www.realhardtechx.com/index_archivos/Page541.htm
shows where to find reviews for PSU's (by maker)
Also you might spend some time reading this about PSU's.
http://www.tomshardware.com/forum/324368-28-computer-power-supplies-guide
Happy reading, enjoy your build (with different PSU)

 

[DECL4N]

how about this PSU the XFX Pro 850W 80+ modular is not rly in my price range and this looks good?

 

[g-unit1111]

how about this PSU the XFX Pro 850W 80+ modular is not rly in my price range and this looks good?

That will be massive overkill for even 2 x 6870. This will cover everything you need: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151095

 

[DECL4N]

May go with your option but I would like to future proof this PC and make sure I have nothing to worry about when installing more power hungry parts.

 

[DECL4N]

Also living in the UK there is only a £1 pound difference between the one I suggested and the one you did :/

 

[g-unit1111]

May go with your option but I would like to future proof this PC and make sure I have nothing to worry about when installing more power hungry parts.

Power hungry parts are becoming a thing of the past. The new generation of GPUs are far more energy efficient than previous generations so the days of 1K+ power supplies are coming to an end. A 950W will handle 3 x SLI for the GTX 670 easily.

 

[DECL4N]

HOW about the corsair TX750 could this easily run everthing and more? Whats the difference between the TX750 and the TX750M also?

 

[C12Friedman]

HOW about the corsair TX750 could this easily run everthing and more? Whats the difference between the TX750 and the TX750M also?

Yes, and the 750M is semi-modular the other isn't.