This is my souped up ProBook 4330s LY465EA -
CPU - upgraded: Core i7-2860QM
CPU - original: Core i3-2350M (been using an i7-2620M for several months before deciding on 2nd upgrade)
Probook BIOS version: F.40
OS X version(s): 10.8.4
The machine is also equipped with the following -
2x Corsair Vengeance 8GB DDR3-1600 (CMSX8GX3M1A1600C10) for a total of 16GB RAM,
Corsair Neutron GTX 240GB SSD (CSSD-N240GBGTX-BK)
1TB Segate HDD in a caddy, replacing the ODD (ST1000LM024)
I insisted on finding a non Engineering Sample/Qualification Sample CPU, which took a long time. Luckily, I found one on eBay and managed to snag it at a bargain price of $265!
The overall cost invested in the upgrades to this ProBook are quite extraordinary. Most probably, I could've bought a real MB for that price, minus some of these upgrades.
Nevertheless I absolutely love this machine. I don't get MacBook-like battery life but its performance is awesome. GB score with the i7-2860QM is around ~10400, whereas with the i7-2620M it scored around ~7600.
My wet dream is a higher resolution screen but seems that's absolutely impossible.