Actually, I had rebuilt the one I have now... It's just the motherboard cannot handle any processors I can afford right now... and quite frankly, I should not have to spend a fair amount of money just so the lindens can keep 5 minutes of their day.
For this, I have a made a Jira for all with this problem. Anything you can add to it would be extremely helpful.
Also, (I managed to get on the mesh beta with my dying laptop which has SSE2, but can only play sl for 3 minutes before crashing...) Please add a scale slider or text area for imported things, cause i exported a few models i made into collada, and they were excessivly large when rezzed, and i did them at the same scale, so adding this would help a lot!