Features 1、1. Compatible for all standard ATX/MATX/FLEX motherboards (with adapter cable required), and supports the maximum motherboard size 305*245mm. 2、 2. Does not compatible for Onda D1800BTC in-line professional bracket motherboard. 3、 3. Long and short graphics cards are compatible, including short graphics card mounting brackets: support all lengths of graphics GPUs. 4、 4. The front of the bracket for locking the graphics card can be locked with 4 12CM fans. 5、 5. You can install 6-8 graphics cards, but it must be equipped with a fan for heat dissipation. Specification Material: SECC Color: Black Size: about 50*28.4*22.2cm No power-on cable and USB, no indicator light Support 6-8 unlimited length graphics cards Package List 1* Main Board 1* Large Graphics Card Bracket 1* Small Graphics Card Bracket 2* Side Panel Reinforcement Bar 1 Set* Screws