How to adjust the IE cache size
Start Internet Explorer
Select Tools | Internet Options | General tab
Under Temporary Internet Files click the Settings button.
In the box for the amount of disk space to use, enter a value between 5 and 80 megabytes.
Click OK to accept the changes.
Note: Since I have a very fast Internet Connection I have found that setting my temp Internet Files to one Megabyte gives me the best performance.