How to build a PC for MT5 back testing?

How to build a PC for MT5 back testing?
I try to backtest using every tick and it is really slow.
Do you know any specs I should look for to build a PC solely for back testing?
How fast would it be?
At the moment, I'm using Pentium 4, Core i5, 2.40GHz, 16383MB Ram

Also does graphics card calculate faster?
Those bitcoin miner used to used graphic cards and now ASIC,
or is there any ASIC for MT5 back testing?

Thank you!