I had a quick look they change their PC spec's all the time, CPU & GPU, Clukos has the right idea, at the start of the year choose a fixed platform (perhaps 3 different price tier's) and stick with it
the last few pc/ps4/xb1 face off's (only writing down nvidia cards)
the gpu's seem pretty stable, though sometimes ti versions sometimes not, the CPU's OTOH vary widely
Face-Off: F1 2015 GTX 780 & i5 3570 = mostly 60fps, i3/GTX 750 Ti = ~30fps (requires overclock to get near the ps4 fps, though with lower quality settings) verdict = PC
Face-Off: Devil May Cry 4: Special Edition i5/GTX780, verdict = PC
Face-Off: Payday 2: Crimewave Edition An i5 and GTX 780, verdict = pc
Face-Off: The Elder Scrolls Online no mention of PC model, verdict = pc
Face-Off: The Witcher 3: Wild Hunt i7 3770K & GTX 780 Ti, i3 4130 & GTX 750 Ti, i5 & GTX 960, verdict = pc
Face-Off: Oddworld New 'n' Tasty i5 3570 & GTX 780, i3 4130 & GTX 750 Ti, verdict = pc
Face-Off: Project Cars GTX 780 Ti or GTX 980 (backed by a Core i7-3770K PC and 16GB of RAM) , verdict = pc
Face-Off: Grand Theft Auto 5 on PC i7 4790K & GTX Titan X, i3 4130, GTX 750 Ti, verdict = pc
Face-Off: Mortal Kombat X i5 3570 & GTX 780, verdict = ps4!
Face-Off: Dark Souls 2: Scholar of the First Sin, i7-3770K & GTX 780 Ti, verdict = pc
Face-Off: Battlefield Hardline i7 3770K & GTX 780 Ti, verdict pc
Face-Off: Resident Evil Revelations 2 i5/GTX 780, verdict = pc
Face-Off: Dying Light i5-3570K/GTX 780, i3 PC with a GTX 750 Ti , verdict = pc
Face-Off: Resident Evil HD Remaster i7-3770k & GTX 780 Ti, verdict pc