I have an older model hp desktop, I installed an ssd and it kept shutting down, so I took my old hard drive out and it still won't stay powered up. So I ended up putting my old hard drive back in. the power supply I have is a hi-pro for HP-D 3057F3R. When I had both drives hooked up it kept shutting down I thing because not enough power, it is a hp p/n 5188-2625 , it's like a 300watt power supply, after i put old power supply back in, it works fine now. I would like to keep both drives for storage and operating system. the computer is an a1467c pavilion from hp. I am looking for a good power supply that would work for like 50 dollars or less . Does it matter how big of one I use and what specifics do I need to look for. If anyone can help it will be greatly appreciated as I am pretty new at replacing parts of a computer................ thanks for any help