Cheap 64 pcie lane cpu to buy

[mybase090]

Hi guys...
Just wanted to know which cpu that will allow me to connect 4 GPU and get the full performance out of it?
I did some research and found out that the amd treadripper has 64 pcie lane. I cannot find another cpu that is cheaper than the treadripper.
Can someone recommend a cpu that will allow me to connect 4 GPU to it and get full performance.
It's a build I doing for password crunching and occasional gaming if possible.
Thanks.

 

[The Original Ralph]

best intel does is 44 lanes, and the cheapest is the i9-7900x
https://cdn-thinkcomputers.netdna-ssl.com/wp-content/uploads/2017/09/intel-core-x-series-processor-skus.jpg

 

[InvalidError]

You aren't going to need anything like PCIe x16 for 'password crunching'. Much like mining, everything happens within the GPU and its VRAM with the only PCIe traffic being assigning search blocks and monitoring process. A single x1 lane would be enough to manage multiple GPUs.

 

[TJ Hooker]

As said above, you probably don't need full x16 bandwidth for GPU compute stuff, and gaming scales poorly or not at all beyond 2 graphics cards anyways (and some don't even scale beyond one).

 

[mybase090]

Well since u guy said that the GPU doesn't use full x16 pcie lane, I narrowed down my options to these 2 cpu;
I7-7800x and I7-8700k
Since the i7-8700k is only x16 and the i7-7800x has 28.
Which one should work best?

 

[InvalidError]

For gaming, that would be the 8700k in most cases. For GPU-based crypto/password cracking, a Celeron or Atom would be enough.

 

[mybase090]

I'm going with the i7 8700k and this mobo https://goo.gl/yKLH1E
And will be using 4 USB pcie riser for the GPU like this one https://goo.gl/9ibZV7
Will the motherboard handle it?
Thanks