For this i will start with, ... I have tried the conventional style with the MB and PSU under the GPUS and even though compact i do not like the heat and air flow. Even with fans i could not get the temps down to nice values. with my rack design i get 60 Deg C Avg per rig on about 75 - 80% fan speed, i use 10x MSI RADEON RX580 ARMOR 8GB, 6 per rig. These images shows an unfinished rig ready for components to be added and the base to be cut and drilled !
This design can hold up to 8 GPU, Full ATX size MB and Dual PSU and i have a slit cut under the MB 8-9 by 1 inch for use of a stacking system..
The width of the unit will hold 4x 120mm Fans front and mid, (Front of the GPUs and Behind the GPUs) sucking air from the front and sucking out from the GPUs at the back.
As you can see from my incomplete or unfinished rack there are 2 rigs, but these two are in the stacking configuration. 4 GPUs and 8 Fans with 1 PSU all controlled bu the unit under.
Parts list in materials is as follows for one rig.
All in millimeters (mm)
1x 90 x 21 x 21 OR 1x 90 x 20 x 20 Wooden Bars
1x 235 x 21 x 21 OR 1x 235 x 20 x 20 Wooden Bars
4x 641 x 21 x 21 OR 4x 641 x 20 x 20 Wooden Bars
5x 482 x 21 x 21 OR 5x 482 x 20 x 20 Wooden Bars
4x 120 x 21 x 21 OR 4x 120 x 20 x 20 Wooden Bars
2x 120 x 42 x 21 OR 2x 120 x 40 x 20 Wooden Bars
2x 264 x 21 x 21 OR 2x 264 x 20 x 20 Wooden Bars
1x 641 x 524 x 6 OR 1x 641 x 522 x 6 MDF Sheet
The reason behind the 21x21 is that the diy shop local to me does not do the 20x20 so the base size is adjusted accordingly.
The first 2 items 90 and the 235 are for the back at the base for the IO on the MB you can see this gap in the picture above.
The 120's are the pillars or stilts all around the unit.
The 6mm thick sheet is the perfect strength for the weight of the components once mounted.
The parts and plan for the rack will come soon once i have completed my prototype.