Can TFX psu replace with ATX one?

[GTHell]

My pc is using a 250w TFX psu and I'm planning to get GTX 750ti which will require more wattage. I don't know much about Power so please help me out. I do some google and some saying that if the motherboard is mini-ATX then it will be fit.

Does TFX and ATX has the same 20/24pin connector? I really want to upgrade GPU without buying new PC.

Addionally, My PC has 4 expansion slot so I assume that it's a Micro-ATX mobo.

 

[C12Friedman]

You should be able to replace your PSU but you will want to stay with a TFX size PSU. The motherboard size and connections aren't the issue here, it's the case size. A case designed for TFX PSU's will not fit an ATX size PSU. If you have changed the case or are intending to change the case, then you may be able to use an ATX size PSU (depending on the case).

 

[GTHell]

You should be able to replace your PSU but you will want to stay with a TFX size PSU. The motherboard size and connections aren't the issue here, it's the case size. A case designed for TFX PSU's will not fit an ATX size PSU. If you have changed the case or are intending to change the case, then you may be able to use an ATX size PSU (depending on the case).

It's mean that my Mobo will support with a ATX psu with no problem?
One more question. Does the Sata using the 4 pin power connector? I open the case up and see all the connector has been use and the HDD is SATA and does ATX has both connector for SATA and IDE?

 

[C12Friedman]

With few exceptions (some Lenovo and HP boards) you would be able to use an ATX PSU. The PSU will have the proper connections. If you're working with an HP or Lenovo motherboard, it may be using proprietary connections that would require an adapter for an ATX PSU to work.
Consider the PSU size difference though, ATX PSU's are almost twice the size of TFX PSU's. Case size is usually a factor in going from TFX to ATX sizes