Quote Originally Posted by sierra_bound View Post
WCG science applications are 32-bit. But there are 64-bit clients available for people with 64-bit operating systems. What team members have found out is that you can generate more points per day (process more work units) using a 64-bit client and OS.
There are many threads about this topic here. The conclusion of the team is x64 gets you about 10% more points than 32 bit on the same machine.

The only piece of hardware that really matters is the CPU and its speed, nothing else has a noticeable effect on performance.