(PC Specs: Motherboard: ASUS P8P67 PRO REV 3.0 CPU: Intel Core i7-2600 @ 3.4GHz RAM: 8192MB DDR3 RAM GPU: GIGABYTE GeForce GTX 760 4GB PSU: Corsair 850W Power Supply Hard Drive 1TB Western Digital OS Windows 7 Home Premium 64 bit)
I have a few questions regarding my PC and video game lag (as in FPS lag, low framerates etc)
I had recently wiped my hard drive using DBAN (I don't know if this was helpful or not, please give insight), in an attempt to start fresh and new. My reasoning behind this was to get rid of old files and such, I just wanted to start new (before, I had multiple versions of Windows installed because I didn't understand how to format properly).
I installed Windows, the latest version of my video drivers, anti-virus, etc. The essentials. Everything seemed to work fine. I installed Steam and a few games (Mainly Team Fortress 2 and Garry's Mod, Dark Age of Camelot). Team Fortress 2 seemed to run fine without any lag as it usually does, but Garry's Mod had a huge framerate fluctuation (It would be 200-300 and suddenly creep down to 30 or 20 for a few seconds and go back up to 200-300 again). It got especially bad when someone would spawn something, it would drop my FPS to around 20, lowering to 10 gradually, and then becoming completely unplayable.
I've tried a lot of things to help my framerates; lowering video settings, messing around with settings in Nvidia Control Panel, etc. It really feels like my system isn't "stable". What I mean is at one point it's working fine and at another it's struggling to keep up.
At this point, I started to panic and figured something was wrong with my OS, drivers, everything really. In the past, I used to blue-screen a lot with the "Memory Management" error. So I decided to run the Windows Memory Diagnostic tool. All it told me was "Hardware problems were detected. To identify and repair these problems, you need to contact the computer manufacturer". I ran Memtest86 as well, and it got quite a few errors. I'm not sure what to make of any of this. Do I need to replace my RAM?
I had also heard there were some problems with some versions of video drivers released by Nvidia. I don't know if this has anything to do with my FPS fluctuations and general lag, but even on my old video card (GTX 560 Ti) it used to be just fine. I should also mention at this point that I had upgraded my video card FROM the GTX 560 Ti to the GTX 760 4GB. At that point everything was alright.
Basically I just need help with a few things:
1. How can I optimize my PC, make it run faster and all that?
2. Is there a certain version of video drivers I should be using?
3. Do I absolutely need to replace my RAM or hard drive?
4. Should I upgrade anything?
5. Should I overclock anything?
Thank you for reading. If any information is missing or incorrect, I'll try to provide as much information as I can.