virtualbox.org

Hello,
I have one Dell machine, which I use to run multiple windows VM. My machine has windows 2008R2 installed, 2 XEON cpus with 16GB of RAM and a normal 32MB intel VGA graphics card.
I have two windows 7 VM installed with 4gb ram, 4cpu, decent graphics memory assigned to each machine and Usually I do VRDP to them.
My problem is the that graphics performance is poor, Machine is so slow to open some folders, browse some directories quickly. opening some application like ms office on them or photoshop etc.. By I f do ssh to them using cygwin, and use command line to browse directories etc , then speed is good.

What should I do to improve windows performance? I have tried updating guest additions, VT is enabled, 3d acceleration is also enables.
Is it a graphics card problem? Should I change my graphics card?

If I understand you correctly the issue of slowness is when you remote desktop into the guest. If so the speed is regulated by bandwidth. As such 3D can really slow things down. You can speed the remote desktop by disabling 3D or use the client to disable wall paper, Etc. and by dropping the resolution.

So, It means buying a new graphics doesn't help us in improving the speed. We already have gigabit network, and are not using 3d acceleration.