You should link to the CPU and GPU benchmarks that were done earlier.
Lay it out in a simple way, ex.
Single Core Athlon 64 ...>2.4GHz = Slow
Single Core Athlon 64 ...2.4GHz - 2.8GHz = Reasonable
Single Core Athlon 64 ...<2.8GHz = Fast
Dual Core Athlon 64 .....>2.4GHz = Resonable
Dual Core Athlon 64 .....<2.4GHz = Fast
Pentium 4 ...................= Slow
Core 2 Duo .................= Fast
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Opteron 144 @ 2.75GHz 1.525V
7900GT @ 632/1612 1.3V
G.Skill DDR500 @ DDR548
Epox 9NPA+ Ultra S939
3DMark06: 5164