Hetzner bidding auction servers has now Core i7 mainly. 920, 930, 950, 975, 980X, 990X, 2600, 3770 and E3 1245

so how these compares? this is nice online cpu comparison site:
http://ark.intel.com/compare/40201,52274,65523,47932,37150,37147,52585,52213


OR another comparison (worse)

(third one on this img is 975)
Name:  920_930_975_e.png
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Name:  950_980X_990X_e.png
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Size:  70.3 KB
Name:  3770_2600_1245_e.png
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Another 2 cpu comparison can be done at:
http://cpuboss.com/