This message was posted on behalf of Intel Corporation
Hello Bruno Nelson,
Thank you for contacting Intel Communities.
In this case, the best answer is based on your budget and some other processors' specifications.
If you don't want to buy a video card, you can get the Intel® Core™ i7-7700K Processor, this because of its clock speed (up to 4.5 GHz) and also the speed of RAM supported (up to 2400 MHz), it also has integrated graphics that support 4K resolution (4096x2304).
On the other hand, we have the Intel® Core™ i7-6950X Processor Extreme Edition, this processor doesn't have integrated graphics so you may get a video card, some of their features are the 25MB cache, 40 PIC Express lanes to connect more PCIe devices, it also supports up to 128GB of DDR4 RAM @2400 MHz.
One important difference is that these processors are meant to be installed in totally different motherboards as their sockets are different (1151 vs 2011 v3), and also you have to consider that a system based on the Intel® Core™ i7-6950X Processor Extreme Edition is more expensive.
You can also go to CPUBoss.com.
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
Hope this information helps.
Please don't hesitate in replying to this post if you need further assistance.