Wondering if this will work right-XPS 8300

[Do_The_Panic]

Hey everyone! I have a XPS 8300 with a i7-2600 processor with 8Gb ram (4x2Gb) a 460 watt PSU and a radeon HD 6450. What I'm looking to replace is the graphics card and PSU and the case.
this is the PSU--- ENERMAX NAXN 82+ ENM750AWT 750W ATX12V v2.3 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply (the link wouldnt work so I just posted the actual name of the PSU.)

this is the case---- http://www.newegg.com/Product/Product.aspx?Item=N82E16811139015
and this is the graphics card-- http://www.newegg.com/Product/Product.aspx?Item=N82E16814102908

Dell told me that I have a 24 pin connector to power the mobo just so you guys know. Do you think this will work? never really tinkered with a computer before so I'm a little cautious.

 

[inzone]

Unless you are going with three of the 6850 in crossfire you don't need a 750w psu the minimum requirement for one is 500w. So even with two 6850 in crossfire you would only need a 650w psu. So the question is are you going to eventually have two 6850's in crossfire or are you only going to have the one card,
If your going to have the one card then a 500w or 520w psu would be good.

SeaSonic M12II 520 Bronze 520W ATX12V v2.3 / EPS 12V v2.91 SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply
$59.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151093

If you want to go a little bigger then you could consider this one.

SeaSonic M12II 620 Bronze 620W ATX12V V2.3 / EPS 12V V2.91 SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply
$89.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151095

Both of these are modular and would be a nice feature to have with a side window case.
If you want to stay with the Eneermax then you can consider this one.

ENERMAX NAXN 82+ ENP650AWT B 650W ATX12V 80 PLUS BRONZE Certified Active PFC Power Supply
$84.99 and a $10 rebate makes the final price $74.99.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817194094

 

[delluser1]

Hey everyone! I have a XPS 8300 with a i7-2600 processor with 8Gb ram (4x2Gb) a 460 watt PSU and a radeon HD 6450. What I'm looking to replace is the graphics card and PSU and the case.
this is the PSU--- ENERMAX NAXN 82+ ENM750AWT 750W ATX12V v2.3 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply (the link wouldnt work so I just posted the actual name of the PSU.)

this is the case---- http://www.newegg.com/Product/Product.aspx?Item=N82E16811139015
and this is the graphics card-- http://www.newegg.com/Product/Product.aspx?Item=N82E16814102908

Dell told me that I have a 24 pin connector to power the mobo just so you guys know. Do you think this will work? never really tinkered with a computer before so I'm a little cautious.

You don't need to upgrade the psu to be able to run that card

 

[popatim]

I would just paint your dell case military green and add a side window and then use the savings to get an even better GPU.