need help with power supply that will fit a hp elite 8300 microtower case

[IanN11]

i need help figureing out what power supply i need to buy that can fit my hp elite 8300 convertible microtower. My current power supply is only 320w and i apparently need a better one so i can replace my amd radeon hd 6570 graphics card with a evga geforce gtx 750 ti card i got from a friend, according to said friend i can only replace the power supply with an hp one that can fit the case, if so how do i go about figuring out what power supply i need and where to find it, ive already tried searching online for what i need but i dont know how to go from just having the info on my current power supply to finding one that will fit.

also as aside question would my 320w power supply be enough to run the graphics card do i absolutely have to get a new one

 

[Aeacus]

GTX 750 Ti is 75W GPU and 300W range PSU should be enough for it.

Though, look if your GPU needs an external power connector from PSU or not. Some GTX 750 Ti GPUs need external power connector and some don't.
If the external power connector isn't needed then you're good. If it is needed, look if your current PSU has the required 6-pin PCI-E connector.

 

[IanN11]

GTX 750 Ti is 75W GPU and 300W range PSU should be enough for it.

Though, look if your GPU needs an external power connector from PSU or not. Some GTX 750 Ti GPUs need external power connector and some don't.
If the external power connector isn't needed then you're good. If it is needed, look if your current PSU has the required 6-pin PCI-E connector.

it does have a 6 pin connector port (or whatever you call it) but i dont know if its required to function or not but thanks for the quick reply
EDIT: my psu doesnt have a 6 pin connector so if it does require is it possible to use a sata to 6 pin adapter to power it?

 

[Sm0k]

Yes it is mandatory to use the 6 pins power, if you PSU doesn’t have one like you said you can use an adapter to power it.

EDIT: With something like this you will be fine https://www.amazon.com/CablesToBuy-Express-Video-Power-Adapter/dp/B000KMU0NU

 

[Aeacus]

As already stated by Sm0k, the GPU does need the 6-pin power connector from PSU to work properly.

The power cable adapter should work. You can either use the 2x molex to 6-pin adapter that is suggested by Sm0k or 2x SATA to 6-pin found here,
amazon: https://www.amazon.com/Electop-Pack-PCIe-Power-Cable/dp/B01LXXOLC9

Just make sure that your PSU has two free molex or SATA power connectors.

 

[IanN11]

As already stated by Sm0k, the GPU does need the 6-pin power connector from PSU to work properly.

The power cable adapter should work. You can either use the 2x molex to 6-pin adapter that is suggested by Sm0k or 2x SATA to 6-pin found here,
amazon: https://www.amazon.com/Electop-Pack-PCIe-Power-Cable/dp/B01LXXOLC9

Just make sure that your PSU has two free molex or SATA power connectors.

thank you Aeacus and Sm0k for all the help,just got it installed and tested on a couple different games and its working great with the 2 sata to 6 pin adapter