Google Chrome is slow

[OP_Chief]

I'm not sure what the problem is. I know for a fact that it isn't my internet connection, because I have Gigabit Fiber from google, and I hit 950mb/s upload and 950mb/s download. I'll hop on YouTube, and go through my sub box, and I have a weird habit of seeing a video I want to watch, and opening it in a new tab. The grey buffer bar loads all the way within a few seconds, therefore the whole video should be rendered and ready to watch. Only problem is, I'll watch it, and it stutters. I don't know what the issue is. It's bad when It's in 1080p, but if I switch it to 720p, it's a little bit better. I figured maybe it was my extensions. Well I only use 3 extensions in Chrome at all times. 1. Avast Online Security. 2. Avast Online Password Protector. 3. AdBlock Plus. So I disabled all, and tried again. Video still stutters. So I cleared Browser history/cache/data. Repeated, Video still stutters. I have no problem watching 4k videos on youtube, but some videos I can't even watch in 720p. Anybody know the issue?
PC Specs-
I7 4790k
8 GB ram
EVGA 8800GTS 320mb VRAM.
MSI Z97 SLI KRAIT Motherboard

 

[Hyboria]

If you use a different browser do you still have the same problem?

 

[OP_Chief]

If you use a different browser do you still have the same problem?

I just tried it on Firefox, but my pc crashed lol. I rebooted, and tried again. I'm using the same video for the test. I loaded it up in chrome, and it's really stuttering. The audio plays, but the video trails behind by around 2-3 seconds, until the videos stops and catches up to the audio. Then I loaded it up in Firefox, and it runs smooth as butter. Don't know what's wrong with Chrome?

 

[OP_Chief]

I may have fixed the problem. I just took out my gpu, and switched to Integrated Graphics, and it no longer stutters. My gpu's FB Usage was at a constant 99%, and I think that's why my pc continued to crash. Then again, that's what I get for still using the 320MB VRAM 8800 GTS. Will just have to wait until I get another Card.