Unbearable lag, even on menu screen

[defaultusername 0]

Installed and reinstalled DayZ standalone and have experienced terrible FPS and lag in-game and on the menu screen. I don't have a high-spec PC, but suspect something is going on to hinder performance. I changed priority to high and it fixed some of the problem, but it's still basically unplayable. 

 

AMD A8 w/ integrated graphics

6gb RAM

Windows 7 Home Premium

[Serious Stan 202]

I may have no clue whatsoever here...

But you said it was lagging, and you tried running it on high..?

 

Maybe you should try running it on low?  or am i being a complete moron here

[Korsbaek 1778]

We need to know which processor you have.

[defaultusername 0]

CPU/GPU: AMD A8-3500M APU with Radeon HD Graphics 1.5ghz

 

For reference, it ran Skyrim fine with graphics set to high.

 

With DayZ I turned the graphics down, but it doesn't affect performance much. The laggy menu screen is hard to explain.

[King of kong 1117]

Runs it on high. Complains about lag

[defaultusername 0]

Runs it on high. Complains about lag

 

Task Manager priorities set to high, graphics on low.

[defaultusername 0]

Setting postprocess quality to v. low made the most drastic improvement. Any other suggestions would be appreciated.