Summary: I purchased this to power my new GPU, A GTX 550 Ti and it works fine but when i turn off the PC i can hear a very faint whining sound from the PSU and when i turn off power to the PSU the noise slowly fades. If you were planning on purchasing this I recommend you spend a little more and go for a TX series PSU from corsair instead as they are built by seasonic which is by far the best PSU company.
Summary: This is the nicest power supply I have ever purchased and I have been building/repairing computers for over 20 years. I worry that because it came from walmart that the quality is compromised. I guess time will tell.
Summary: had my power supply for 3 weeks now and no problems yet. it's supporting a Anttec ISK600 Case. with a i7-4770 procs, GTX760 SC 2GB, 250gb SSD Samsung drive, 750gb western digital 7200rpm drive, 8gb or corsair Vengeance mem. and it's running everything awesome.
Summary: I used this to replace a dead power supply in my Dell XPS 7100. Most box computers come with a cheapo power supply that will die within 5 years (mine died in 3). Dell is no exception. This one fit right in and made the computer about 50% less noisy. This is the second CX-500 I've bought and I will keep on buying them.