Computer Freezes then Beeps

First off,

Thanks to those of you who have helped me in the past.

Now on to my problem, I have been looking around and believe my issue is with the RAM with the beeping I heard this morning. However, it has only occured this morning and will try to give you a timeline of what transpired this week.

***Something noteworthy possibly: I have been experiencing for the past month or two, when I start up my computer it sounds like a fan isn't spinning properly and is clicking, but once it gets into Windows and gives me access it doesn't make noise, don't know this issue either, but since it has been going on for 2 months I don't think it is as relative, but wanted to give you guys as much information as possible***

10/4:
My computer starts to freeze up when I am playing facebook games or watching YouTube. On restart it said that the overlock wasn't working in before it went to the Windows screen. I hadn't overclocked my video card in a month or two. I wish I had taken more notes, but I didn't think much at the time   Then I get into my computer and in about an hour it shuts off... This occurs once or twice and I shut down my computer, but got home late from work and couldn't dissect further. The overclocking error message only happened once this whole time

10/5:
Realize that I may have a virus or malware, so used MalwareBytes and it found 5 trojans that were spoofing games I played. I removed them but it took me almost all day because my computer would freeze after 30-45 mintues and it was taking the program an hour to run. After the trojans were removed (I did this in safe mode), the problem seemed to get a little better.

10/6:
Computer would function for a good few hours and even ran a rendering project in Sony Vegas. Then later in the evening it froze on me (No beeping occured yet)

10/7:
Worked all day and the system didn't have an issue. Decided to leave it on overnight to run some programs such as O&O defrag and avg security

10/8:
Got online and was checking email and facebook before going to work. Computer froze up and started this long continuous beeping with no breaks. This leads me to believe it has to do with the RAM. What else would you guys need to help me out?

This is a computer I built from scratch about 2 years ago and it has worked well since then, I do videos for YouTube and render projects and videos for the past 2 years and no real issues have come up.

My Computer Specs:
Ultra LSP750 750-Watt Power Supply - ATX, SATA-Ready, SLI-Ready, 135mm Fan, Lifetime Warranty (10/30/09)
Seagate Barracuda 1.5TB Hard Drive ST31500341AS - 7200RPM, 32MB Cache, SATA-3G (10/30/09)
Intel Core i5 750 Processor - 2.66GHz, LGA 1156, 8MB L3 Cache, Quad-Core, Lynnfield, Retail (10/30/09)
Asus P7P55D LE Motherboard - Intel P55, Socket LGA1156, Core i5, 2133MHz, DDR3 (10/30/09)
OCZ PC3-10666 Platinum RAM - 4GB, 2x2GB, 1333MHz, DDR3, Low Voltage, Dual Channel (10/30/09)
Cooler Master Hyper N520 Copper Heatpipe CPU Cooler (6/30/10)
Sapphire DIRT 3 EDITION Radeon HD 6950 2 GB DDR5 DL-DVI-I/SL-DVI-D/HDMI/DP PCI-Express Graphics Card 100312-3SR (10/22/11) ***This was to replace an old graphics card***

Thank you to anyone who can help, I am at work and will be checking to reply. I hope I gave you enough information. After research, I realize I need to go to Speedfan and check the fan speeds as well as check the RAM, but if there is anything I am missing please let me know. My computer skills are not beginner, but definitely not used to dealing with this problem.

Thanks