I need to build a new desktop PC, where ab-initio DFT calculation going to be performed. I am searching for a CPU in value range 600 - 1000€. I was thinking about six-core Intel Core i7-6850K or 8-core Intel Core i7-6900K. However Intel Core ix processors are desktop processors so they are optimized for multimedia application and games, I think there are some features I don't need. In case of DFT calculation the most important stuff are matrix-matrix multiplication and FFT. So I was thinking also about Intel Xeon processors. In the same price I can buy 8-12 - core CPU, but with lower frequency (Intel Xeon Processor E5-2630 v4). Now I dont know what to buy.
I cannot find any DFT CPU benchmarks on the web. Can you help me please?
To make it more clear: In value range 600 - 1000€ is better to buy intel i7 or intel xeon for DFT calculations. I am aware of GPU computing and that there are also server solutions, but I am not asking about that.