WD Caviar Black secondary hard drive, unable to format

I recently built a computer for myself(first timer, woo hoo). Here are the specs:

http://pcpartpicker.com/p/1JSer

I've got everything up and running, but the secondary hard drive won't stop giving me trouble. At first it ran fine, but after a couple days the programs I was running off it seemed to get laggy. Since I didn't have anything on there that was difficult to replace at that point, I decided to delete the simple volume, make a new one, and reformat. Once it got the the formatting part, however, it didn't work. It would usually hang for a long period of time, then tell me it was unable to complete the format.

Eventually, after being unable to find a solution to this, I got fed up with the situation and returned it to amazon. After receiving a second WD Caviar Black 2TB HDD, I installed it and everything was working fine. For a couple days. Then the lagginess started up again, and I had the bright idea to do what didn't work last time.

I've ran the Data Lifeguard Diagnostics for Windows program that WD provides on their site. The Caviar Black passes the quick test, as well as the extended test. When I try to write zeros, however, it stops often and says that it is unable to write zeros for certain sectors(it also has an estimated time of several months long).

Just to be clear(because in all the posts I've been looking through, this usually comes up), I am going to disk management, making sure the drive is online, creating a new simple volume(I've tried both GPT and MBR formats), and formatting the disk(I've tried both quick and full). It always sticks at the formatting. I've used this guide step by step:

http://wdc.custhelp.com/app/answers/detail/a_id/3865/related/1/session/L2F2LzEvdGltZS8xMzgyOTkyMjQzL

Also, my BIOS and drivers are up to date.

Is there some kind of incompatibility with my HDD and some other aspect of my system? I was under the impression that secondary HDD's are supposed to be pretty simple to install. I've only had the chance to run a couple games like Aion, Skyrim, and a few other steam games, so I don't think I've been overworking it or anything. If it weren't for the fact that this has happened to TWO hard drives in a row, I would think it was DOA or something, but what are the chances of that happening twice? If anyone can offer some insight into this problem, I would be very grateful!

EDIT: I was able to format the HDD when i first installed it.

Alright, it is working now. It seems to be fine, but I'm worried the original lagginess problem might start up again. Does anyone know what might be the cause of that? Again, seeing as how it happened with two separate drives, I'm doubtful that it is a problem with the hard drive itself. I guess it might have been the mobo port, so I'll leave it where it is for now.