System/ Hardware/ Software??

[The Phoenix]

Ok, so i use my computer for gaming. Some days, my computer has great performance. Some days, it doesn't. I shut it off when I'm not using it. Let it cool off, give it some time to relax. Sorta
Yesterday it was running great. Solid 60 fps all games. I played on it for about 8 hours, (Taking 15 minute breaks from time to time) I played none intensive games. Like Minecraft and Garry's mod. Later at night i played Fallout NV. That's it I put my computer to sleep mode and went on with life. Next morning i get on it. I open up Minecraft, i play the game. And the game Skips, or lags. But it says i'm getting 45 fps. I know what 45 fps feels like (I've been gaming for 2 years now) It feels like it's buffering or "Skipping" I thought my Graphics card got hot or something, so i looked at the fan speed in MSI Afterburner. It was set at 60. Then, I opened my computer to see if it was hot. It was normal temp. Didn't feel hot, didn't feel cold. So i thought, it's not my GPU. What could it be? I thought next it was my HD. My hard drive isn't the best. But, it was working just fine yesterday.

PC specs.
CPU: AMD Athlon 7850 Duel-Core Proccesser.
RAM: 3GB DDR2
GPU: NVIDIA Geforce GT 630 2GB VR RAM
HD:280GB 7200RPM

 

[terry4536]

My first guess is that you may have acquired some spyware or mal-ware. I would scan for viruses first.

What are your temperatures?

 

[firo40]

That is an extremely low spec computer it amazes me you can play any of these games with no stutter

 

[The Phoenix]

My first guess is that you may have acquired some spyware or mal-ware. I would scan for viruses first.

What are your temperatures?

For my CPU or GPU?

 

[firo40]

Both your CPU is ancient your ram is way to low and slow and your GPU isn't even made for gaming its for media

 

[terry4536]

I was referring to the CPU, GPU, and motherboard temperatures. But the most relevant is the GPU temperature to eliminate throttling.

I would also suggest running memtest to verify that the RAM is functioning.
That is all I can think of to explain the overnight loss of performance.

The video artifacts could also be evidence of graphics card failure as well.