Issues relating to HDD Installs. Once you have installed Knoppix, it basicly becomes debian, so you should check out www.debian.org for information.
DELL PowerEdge R730 Server 2x E5-2640v4 2.4GHz =20 Cores 32GB H730 4xRJ45
$259.00
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 480GB SSD 2x 10GBE
$273.00
HP Proliant DL360p G8 Server 2x E5-2680 V2=20 Cores | P420i | 256GB | 2x 2TB SAS
$297.99
Penguin Computing / Gigabyte MG50-G20 2U 8x GPU E5-2600v3/v4 Graphics Server
$600.00
Dell PowerEdge R420 Dual Intel Xeon E5-2440 v2 @1.90GHz 32GB RAM No HDD H710
$74.50
Dell PowerEdge R620 Server - 256GB RAM, 2x8cCPU, 120Gb SSD/3x900Gb SAS, Proxmox
$320.00
Dell PowerEdge R620 Server 2x E5-2660 v2 2.2GHz 20 Cores 256GB RAM 1x 480GB SSD
$139.99
SuperMicro Server 505-2 Intel Atom 2.4GHz 8GB RAM SYS-5018A-FTN4 1U Rackmount
$202.49
DELL PowerEdge R430 8SFF 2x E5-2630v3 1.8GHz =16 Cores 32GB H730 4xRJ45
$206.00
Dell Poweredge R630 2x Xeon E5-2680 v4 2.4ghz 32-Cores / 64gb / H730 / iDracEnt
$309.99