VM running slower on desktop than on Laptop

[Fricken Hamster]

So I have two host machines, a Desktop running Win7 64bit with an i5 750 @ 3.255GHZ, 8GB RAM.

And a laptop that has AMD Llano A6-3400M @ 2.3GHZ

I am running Mint14 MATE 64bit with 1GB RAM on both.

My Desktop should be more powerful, however the VM runs a lot smoother on my laptop. On the desktop, lag is really noticeable when opening programs. Any thoughts on how to optimize or speedup the Guest machine on my desktop?

Thanks!

[noteirak]

VirtualBox VM 4.2.6 r82870 win.amd64 (Dec 19 2012 14:42:41) release log
00:03:13.862419 Guest Additions information report: Version 4.1.18 r78361 '4.1.18_Ubuntu'

Make sure the guest additions are up to date. In this case, they are not.

[mpack]

A lot of things contribute to VM speed more than CPU. Bus and disk speeds for example. It also matters what else you have going on on the PC - bandwidth eaters such as antivirus, background network backups etc.

If you have the same VirtualBox version running on both PCs then you have identical VirtualBox code running on both - so draw your own conclusions from that.