Prebuilt 1155 options
Why prebuilt?
Prebuilt options are a good way to get into “the game” with a tight budget. If you’re looking to build a standalone NAS Killer and you have little experience, a prebuilt can save you a lot of hassle. I’d still recommend thoroughly reading over the spec sheets of the prebuilt you’re looking at before purchasing.
Prebuilt systems are very cost effective and proven, with fantastic documentation. They have their limitations though, so make sure to have a solid plan of attack.
Towers
These typically have more HDD and PCI-E slots than the other, smaller form factors. It’s really easy to add a DAS to these towers with the full-height PCI-E. Depending on the config, you could end up with a single tower-size prebuilt and up to 32 drives in 1-3 DAS boxes… The options are pretty limitless. Towers, for the most part will use standard M-ATX, ATX, and BTX motherboard configurations, allowing for standard GPUs and other devices to be installed.
The best tower of the bunch is easily the Dell Poweredge T110 II. It has the most drive bays, it’s readily available, and supports a wide range of hardware. Plus it looks like a batmobile 
. It’s certified badass.
The Lenovo E30/E31 can also be found for extremely cheap, and look funky with a gigantic carrying handle on them. They are a really good value for what they are.
Smaller form factors
The Flat Towers, SFF, and uSFF boxes are good for adding cheap compute power to an existing setup. I personally prefer to have certain services segregated off physically from the main server / NAS, so these are are pretty cheap way of doing that.
Example: You already have a 8-bay NAS setup, and want to move Plex Media Server off of it to free up your NAS for file processing. You could buy a M92p Tiny, throw in a SSD for Plex metadata, and mount your NAS shares as a network drive - and you’d have a tiny dedicated box for serving up Plex.
Consumer Prebuilts
| Brand (specs) | Model (link) | CPU | Max RAM | Form Factor | 5.25" bays | 3.5" bays | 2.5" bays [using 3.5" bay] | PCI-E | NIC |
|---|---|---|---|---|---|---|---|---|---|
| Acer | Veriton L4610G | 2nd-gen Core | 8GB SODIMM | USFF | 0 | 1 | [1] | 1 (mini), 1 MSATA | 1 |
| Acer | Veriton L4620G | 3rd-gen Core | 8GB SODIMM | USFF | 0 | 1 | [1] | 1 (mini), 1 MSATA | 1 |
| Dell | Optiplex 7010 MT | 3rd-gen Core | 16GB UDIMM | Tower | 2 | 2 | [2] | 3 | 1 |
| Dell | Optiplex 7010 DT | 3rd-gen Core | 16GB UDIMM | Flat Tower | 1 | 1 | 1 [1] | 3 | 1 |
| Dell | Optiplex 7010 SFF | 3rd-gen Core | 16GB UDIMM | SFF | 0 | 1 | 1 [1] | 2 | 1 |
| Dell | Optiplex 7010 USFF | 3rd-gen Core | 16GB UDIMM | uSFF | 0 | 0 | 1 | 1 (mini) | 1 |
| HP | Compaq Elite 8300 CMT | 2nd/3rd-gen Core | 32GB UDIMM | Tower | 3 | 3 | [3] | 3 | 1 |
| HP | Compaq Elite 8300 MT | 2nd/3rd-gen Core | 32GB UDIMM | Flat Tower | 2 | 2 | [2] | 3 | 1 |
| HP | Compaq Elite 8300 SFF | 2nd/3rd-gen Core | 32GB UDIMM | SFF | 1 | 2 | [2] | 3 | 1 |
| HP | Compaq Elite 8300 USFF | 2nd/3rd-gen Core | 16GB UDIMM | uSFF | 0 | 0 | 1 | 1 (mini) | 1 |
| Lenovo | ThinkCentre M92p Tower | 3rd-gen Core | 32GB UDIMM | Tower | 2 | 2 | 1 [2] | 2 | 1 |
| Lenovo | ThinkCentre M92p SFF | 3rd-gen Core | 32GB UDIMM | SFF | 1 | 2 | 1 [2] | 2 | 1 |
| Lenovo | ThinkCentre M92p Tiny | 3rd-gen Core | 16GB SODIMM | uSFF | 0 | 0 | 1 | 1 (mini) | 1 |
Server / Workstation Prebuilts
| Brand (specs) | Model (link) | CPU | Max RAM | Form Factor | 5.25" bays | 3.5" bays | 2.5" bays [using 3.5" bay] | PCI-E | NIC |
|---|---|---|---|---|---|---|---|---|---|
| Dell | Precision T1600 | 2nd-gen Core, Xeon E3 v1 | 16GB ECC UDIMM | Tower | 2 | 2 | [4] | 3 | 1 |
| Dell | Precision T1650 | 3rd-gen Core, Xeon E3 v2 | 32GB ECC UDIMM | Tower | 2 | 2 | [4] | 3 | 1 |
| Dell | Poweredge T110 II | Xeon E3 v1, Xeon E3 v2 | 32GB ECC UDIMM | Tower | 2 | 5 | [5] | 4 | 1 |
| HP | Z210 CMT | 2nd-gen Core, Xeon E3 v1 | 32GB ECC UDIMM | Tower | 3 | 3 | [2] | 5 | 1 |
| HP | Z210 SFF | 2nd-gen Core, Xeon E3 v1 | 16GB ECC UDIMM | Flat Tower | 1 | 2 | [2] | 3 | 1 |
| HP | Z220 CMT | 3rd-gen Core, Xeon E3 v2 | 32GB ECC UDIMM | Tower | 3 | 3 | [3] | 5 | 1 |
| HP | Z220 SFF | 3rd-gen Core, Xeon E3 v2 | 32GB ECC UDIMM | Flat Tower | 1 | 2 | [2] | 3 | 1 |
| HP | Proliant ML110 G7 | 2nd-gen Core, Xeon E3 v1 | 16GB ECC UDIMM | Tower | 2 | 4 | [4] | 4 | 2 |
| Lenovo | Thinkstation E30 | 2nd-gen Core, Xeon E3 v1 | 16GB ECC UDIMM | Tower | 2 | 3 | [3] | 2 | 1 |
| Lenovo | Thinkstation E31 | 3rd-gen Core, Xeon E3 v2 | 32GB ECC UDIMM | Tower | 2 | 3 | [3] | 2 | 1 |