Building a Little Budget Cruncher

[Aux10]

I'm making a little budget cruncher to help stave off my hunger while I wait for the Skylake CPUs. I just sent my order off to New Egg and got these part for $341. What Linux Distro works best for crunching? Last time I tried linux I used Ubuntu and I remember it watering down my GPU credits substantially. Since this is a budget box I don't want to waste my cash on a OS.

Case: Thermaltake Urban S1
CPU: Intel Pentium G3220 Haswell Dual-Core 3.0GHz
MOBO: ASRock H97M Anniversary
PSU: Corsair CX430
GPU: EVGA GTX 750Ti
RAM: Some stuff in my spare parts pile.
HDD: Old junk drive.

Now, what shall I name it? Hmm...