It's not hard to see metrics for SSD's vs Raptor HDD's... just go back like 8 years for the first ssd reviews and you will find them. Back then it was a joke comparing them because of how fast the ssd's were compared to hdd's, now it's just silly.
quick solution
The way i have found is to use the hd4000(IGP) on my intel while the 680's crunch. It can be pluged in and out while the pc is on so its not much of a hassle.(between the 680/HD4000 igp) Havent tried with amd's in-motherboard igp solutions yet or an APU, which should be...
i got a few 5870's multi wu'ing now, they work FAARR better than my 680's.
I used the straight info file for gpu's only. Havent tried mixing it with cpu wu's thou.