Need Help -new computer...

so im thinking of buying one of these computers and ijust want to know how much fps they would give me in a 1 v 1 and 8 v 8 heres the first one

Intel® Core™ i7-960 Processor (3.2GHz, 8MB)
Genuine Windows® 7 Home Premium
SLI - Dual 1GB NVIDIA® GeForce® GTX460
9GB (3X2GB/3X1GB) DDR3 SDRAM 1333MHz Memory
2TB Hard Drive
16X DVD+/-RW with Dual Layer Write Capability

next one

Intel® CoreTM i5 and i7 Processor Options
Genuine Windows® 7 Home Premium
1GB ATI® RadeonTM HD 5670
6GB 1333MHz DDR3 SDRAM (2x2GB/ 2x1GB)
750GB SATA 3.0Gb/s Hard Drive with Native Command Queuing
16X DVD+/-RW with Dual Layer Write Capability

thanks if you could tell me