To provide some more data points, here's the performance on my aging 3.33GHz Xeon X5680 based machine running Linux:
$ mame64 ddux -bench 90 Average speed: 500.85% (89 seconds) $ mame64 tankbatt -bench 90 Average speed: 226.52% (89 seconds)
And also my even older 3.16GHz Core 2 Duo E8500 based machine running Windows 7:
C:\Program Files\MAME>mame64 ddux -bench 90 Average speed: 467.09% (89 seconds) C:\Program Files\MAME>mame64 tankbatt -bench 90 Average speed: 168.37% (89 seconds)
For what it's worth, this E8500 is almost certainly a drop-in replacement for the OP's CPU, and they go for about $10 on eBay. An 3.33GHz E8600 would be even better for maybe $20.
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