Here is a list of motherboards for the Intel Core i7-8700K processor and for each of them the performance in the popular Geekbench 4 benchmark software in single-core and multi-core. We have sorted out several hundred results, among the best values.
|Motherboard||Single core||Multi-core||Memory||Rate /5 (reviews)||Price||Format|
|ASUS ROG MAXIMUS X APEX||7713||35738||16 GB||4.0 (47)||$489||ATX|
|ASRock Z170||7579||35354||16 GB||4.1 (141)||$288||Micro ATX|
|ASUS ROG MAXIMUS X HERO||7374||34147||27 GB||4.1 (262)||$262||ATX|
|ASRock Z370 Pro4||7071||33685||16 GB||4.1 (80)||$148||ATX|
|ASUS ROG STRIX Z370-F GAMING||7320||33505||16 GB||4.0 (88)||$270||ATX|
|ASRock Z370 Taichi||7146||33420||16 GB||4.8 (131)||$291||ATX|
|ASRock Z370 Professional Gaming i7||7185||33380||16 GB||4.2 (31)||$323||ATX|
The ratings come from the largest online shops. Costs may vary over time and do not include shipping costs.
The best motherboard is by far the ASUS ROG MAXIMUS X APEX. This is the one that gives the most points in single core, as well as in multi-core.
How much memory?
It seems that there is no difference between 16 GB DDR4 SDRAM and 32 GB. Note that the motherboard ASUS ROG MAXIMUS X HERO however needs about 27 GB (so 32 GB) to arrive in 3rd position in this ranking.