I just now got a BSOD

[LW07]

Here's what happened. I was browsing the internet. I then decided to log off of FireFox. When I did that, about 3-5 seconds later, the computer got a BSOD with a message that said IRQL NOT LESS OR EQUAL. And when it restarted and got into Chkdsk which started to lock up on me in the past this month(this time it didn't), it started to scan my hard drive and found tons of bad entries in my firefox thing. It usually likes to find things wrong with my firefox profile(I don't remember exactly what it said, was more interested in getting back up and running.). However, I want to know what the problem is since the message said IRQL NOT LESS OR EQUAL. I get that about every 1-3 weeks, depending on my luck. I ran prime 95 with the option of the most ram testing about 3 weeks ago and it failed in like 8 seconds with an error that said something about rounding. the rounding was at 0.5 and it was expected to be 0.4 or less, and I don't know what rounding in that sense relates to. Can you guys help me sort out my problem? Is IRQL NOT LESS OR EQUAL ram related? And if so, here's my current ram: http://www.newegg.com/Product/Product.asp?Item=N82E16820146970
I have been getting BSODS and crashes alot(again, about every 1-3 weeks) ever since I got this thing upgraded back in november. Is this ram good quality? :http://www.newegg.com/Product/Product.asp?Item=N82E16820146545 I'm asking this because if this is memory related, I want to know if that stick of ram is a good quality reliable stick.

Here's my motherboard if that helps:
http://www.newegg.com/Product/Product.asp?Item=N82E16813127222

 

[LW07]

I don't think I have a problem now. I lowered the RAM's timings from 3-3-3-7 to 3-3-3-8 and the speed from PC3200 to PC2700 and Ran Prime 95 with the most ram testing for 46 minutes with absolutely no errors! I stopped it myself because I wanted to test it to 7:00PM, which it passed all the way!!!! It was in the 4th test of the 3rd set, and no problems! I think it'll be more stable, now! Correct me, though, if I'm wrong. But for me, 46 minutes of Prime 95 with no errors and being stopped by me rather than an error is a HUGE improvement over 7-10 seconds.