Undestanding PCI slots?

[Mattium_]

So, I have a HP Pavilion with:
Expansion Slots:

• 1 PCI Express x16 (Gen 2.0)
  3 PCI Express x1 (Gen 2.0)
  1 PCI Express Mini Card (Gen 2.0)

Which I can't understand for the life of me, but all I want to know is if I buy a NVIDIA GeForce GTX 750 TI will it fit?
And also, what power supply does this take because currently I'm running 300V.

 

[Dazinek]

Yes you can use the 750 ti, you can put it in the x16 slot. As for your PSU, You need to upgrade it too at least a 400w with 20 amps on the 12v rail(Reputable brand).

 

[unknownofprob]

Put the GTX 750Ti in this slot-

PCI Express x16 (Gen 2.0) (PCI-E is backwards compatible so 3.0 is not required for that card, it can run on PCI-E 2.0 slots also)

With a power supply get this -

EVGA 500B - You always want watt headroom for the future, to prevent upgrading again. Higher wattage of this type is more efficient also.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438012