New power supply but no 24 pin connection

[Mythicaldrip]

I'm trying to upgrade my graphics card from a Geforce GT640 to a Geforce GTX950. I'm new at this so didn't realize to check the power supply. I need 350 instead of the 300 that it had. I bought a new power supply but when I went to install it, there is no 24 pin connection on the motherboard. The old power supply hooked up via a four pin and six pin connector. My question is do I need to have the 24 or is the 4 and 6 fine? The computer is an Acer Aspire with a microstar M5-7829 motherboard.
Here is a picture of the motherboard that I found online, mine's the same but has parts installed.
https://10.img.avito.st/1280x960/1822357510.jpg

Thank you for any and all help.

 

[Dark Lord of Tech]

You need the adapter.

http://www.moddiy.com/products/Acer-PSU-Main-Power-24%252dPin-to-12%252dPin-Adapter-Cable-%2830cm%29.html
Acer PSU Main Power 24-Pin to 12-Pin Adapter Cable (30cm)


http://www.amazon.com/24-pin-12-pin-Power-Supply-Adapter/dp/B00YDN1OX2
Acer 24-pin to 12-pin PSU Power Supply ATX Main Power Wire Adapter
Also cheaper option.