I have done a lot of research on Google as well as on this forum to find a solution to my problem. Unfortunately, people who have posted on the forums have SIMILAR but not the exact problem as I have.
I would like to take this opportunity and explain exactly whats been going on, hoping it'll make it easier for you to determine the cause of this issue.
So, I have built my computer about a year ago. It was all fine until May 2010, when my computer started to show signs of slow performance, which means running programs started not to respond and the games I was playing was getting stuck from time to time. At that exact moment, if I tried to restart my computer... It would reboot very slowly, motherboard logo will be displayed about one or two seconds delayed and finally when it comes to 'Starting Windows', It always getting stuck there for about 3 to 4 minutes and then Windows Logo comes up. It takes 20-30 minutes until Windows is completely loaded. Even so, it is still slow. It is impossible to use the computer.
This doesn't always happen, its only sometimes. That is what confuses me because It is making it extremely difficult for me to determine a real cause, I cannot make a decision whether its a software or a hardware problem, if it is the hardware problem, which component is it? It seems that If i remove a memory chip or two, it goes back to normal and everything functions well. Eventually, It makes me think that its the memory chip that at fault.. but then it happens again and i take out video card, put it back again, its normal again... and if i insert HDD cable into a different SATA slot, it goes back to normal. And sometimes it doesn't really make a difference. Overall my hardware seems all right, so is O/S. I just cannot determine what is wrong and why it's happening sometimes, why not always - and WHY IS IT HAPPENING!!!??.
My Computer specs:
OS Windows 7 x64
CPU AMD Phenom(tm) II X4 955 Processor 3.20 GHz
Motherboard GigaByte - MA790X-UD3P
Memory 4GB - Kingston - DDR2
Graphics Card(s) ATI Radeon 5700 Series
Hard Drives HITACHI ATA Device - 500GB
PSU Colorsit 600W
What I tried so far:
I have updated my BIOS. Resetted CMOS, taken out battery for more than 10 minutes. Re-formatted computer with 3 different Operating systems (Windows 7,WinXP,Ubuntu Linux). Installed motherboard drivers when the operating system installation was completed. Checked if everything is set up correctly in the BIOS.
No matter what I did, resolved my problem nor gave a conclusive determination. I beg for your forgiveness for the long text, however I am desperate. I would appreciate your time and help.