Gamespot HD video plays very laggy

I've been having this problem for a while now. Whenever I play any HD video on the web it plays very very laggy. No known reason why. My PC should be more than powerful enough to play them. Even when I let the video load all the way it still plays laggy. In the past it's worked before but I've reinstalled OS's, motherboard, etc. so many times I can't remember when it started to not work properly.

Originally I thought I fixed the issue by updating my graphics drivers, which at the time fixed the issue for a different site (can't remember, vimeo maybe?). Now, when I went to watch the MW3 trailer in HD it was very very laggy. I've been looking at processes to see what might be lagging it but really don't have a deep knowledge in this area to fix.

Here are some specs:

Win XP SP3

Intel Core 2 Quad Q6600 @2.4ghz

2.75BG ram

Nvidia 8800GT SLI: driver version 6.14.12.6099

Flash version: WIN 10,3,181,14

Java version 1.6.0_24

Let me know what else you guys need to determine what's going on. I appreciate any and all help.

Thanks.

So....I updated my nvidia drivers again just now and it views fine. HOWEVER, I noticed that SLI was turned off after the update. AFter I turned SLI back ON and went to the video it was laggy again...why would this be happening? How can I fix this?

Perhaps there's a bug with flash videos and SLI. You should also try different browsers - keeping in mind you'll also probably have to install flash separately on those - besides Google Chrome which has it included.

Besides flash, you could also try installing adobe shockwave.

Edit: Another thing you can try is to force windows to use all your CPU cores all the time. You can do this by clicking Start - then Run - then type msconfig and hit enter. Under the "Boot" tab - click Advanced options. In there click the checkbox beside "Number of Processors" or "NUMCPUPROC" and select 4 from the drop-down. Click OK - then Apply - then restart your pc. If this doesn't do anything - at the very least it may somewhat help your overall PC speed.

Under the "Boot" tab - click Advanced options. .

Stinger78