How do i fix this Starcraft 2 lag!

That's weird. I would run PassMark to benchmark my system and compare the results to others with your CPU+GPU combo. That would indicate whether you are having a hardware or software problem.

But you're right, you should be on ultra. I have an i5-661 with an HD5770 and I have no problems playing Starcraft 2 on ultra.

3D Graphics Mark
This Computer 1752.7

Graphics 3D - Simple
This Computer 1884.0

Graphics 3D - Medium
This Computer 492.6

Graphics 3D - Complex
This Computer 39.7

Graphics 3D - DirectX 10
This Computer 43.4

Also
PassMark Rating
This Computer 758.6

CPU Mark
This Computer 1438.0

2D Graphics Mark
This Computer 204.5

3D Graphics Mark
This Computer 1752.7

Memory Mark
This Computer 479.1

Disk Mark
This Computer 530.0

CD Mark

Weird indeed.. Have you tried a graphics driver update?

I've reinstalled them numerous times and even upgraded to windows 7 x64

How much RAM?

make sure systemis well cooled and cables are neat a plenty of ram that should help

I got 4gbs of ram and my computer is usually at 40-50 C

Have a look at your Power Options settings in Windows and make sure that you are not on the Power Saving profile. This profile prevents the CPU and GPU from setting their clock speeds to maximum when you run a demanding application.

perhaps it's not your comp but your ISP/ router ?

I had issues as well until I turned my settings way low, then again my comp is not as good as yours.

i checked and my power saving is on high performance.

Router or ISP speed should have no effect on the game's performance, besides lag in online gaming of course.

Quite honestly, I'm stumped. Are you sure that both your CPU and CPU spin up to maximum clock speeds when you launch the game?

Update drivers?
Download 10.9 to your videocard   (amd newest driver)

Not sure, but i know under cataylst control center i cant change the fan speed or anything

Fan speed is not the issue here, the question is whether the card ever gets out of idle mode when you start playing. Does CCC give you graphs of your GPU clocks? If so you can leave it open, run the game for a few minutes, and then verify that your GPU was indeed running at full speed while the game was running.

ATM it runs on 800MHz for GPU (875MHz Is max) and 1000MHz for Memory (1200MHz is max)

This topic has been closed by Mousemonkey