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Hey! I wanna make a supercomputer but I'm currently, "balling on a budget". I want it to be rackmounted! Why, you may be asking? Cuz how cool would that look in my basement!? I have no idea what I'd use it for yet. Probably mining ethereum until that goes proof of stake, then some folding, some hash cracking, and a little bit of deep learning. So let's say my budget is $1000. Here's what I want.... GPUs I've messaged every nearby craigslist poster with an AMD card better than a 7850. I want as much parallel processing power as possible. I'm looking to use Virtual OpenCL (VCL) to cluster my machines. Think I can get 6 really nice cards for under $400? Ideally someone has a mess of 7950's they're not using anymore. Hardware Rack mountable server chassis and a server rack. I know I can get 2 4u server chassis' and a shitty tripp lite rack for something like $220. I like the idea of 2 computing nodes and a third master node. CPU/MOBO I need to get as many GPUs per motherboard as possible. A typical rack server chassis only has 7 expansion slots and each video card is conceivably going to be 2 slots wide. This means a max of 3 video cards per board and one single width slot leftover. Based on PCIe lane width I'm going to want to go with the AMD 990FX/SB950 chipset combo to save money but not sacrifice too much performance on the PCIe lanes. I'd probably pick up a 6 or 8 core FX processor. Intel is out of the question with my budget. Looking at mobos that meet this criteria, the Asus M5A99FX Pro R2.0 seems like a good option for ~$85 used on eBay. It also has a 4th PCIe slot, which could be useful because of my next point.... Networking Eventually I'll need a darn good network connection. For now GB ethernet is fine but maybe, just maybe, i'll switch to Infiniband later. If I do that, I'm going to need a free PCIe slot for the networking card. This will also had some significant cost to the project. Power Now this is where things get expensive. A decent ATX 1500W PSU is like $250 used, and I need 2 of those! Any ideas? Storage In order for this supercomputer to be truly super, I'm going to need fast storage...what should I do? An SSD would be the obvious choice, but how am I going to afford 2 of those on my budget? What about RAM, do I need a lot of RAM on a system like this? Any ideas BinRev?