D5nyp73r :
thanks for the link grr8 video... but i have one question 4cloud can I install ASUS Z9PE-D8 WS MB in Coller master HAF X ....?
No you can't, the CM HAF X only allows ATX, MICRO ATX AND EATX BOARDS the ASUS Z9 PE D8 WS has a SSI EEB form factor. However there is one from Rosewill called ARMOR there are a bunch of Silverstone cabinets that allow that form factor. You do realize that that board is for workstation PCs? I have a few questions though: What do you plan to use it for? Which components will you use or already have with the board? Do you have a certain budget or is the CM cosmos too expensive?
Here's a list of cabinets you could see or research on that are compatible with the ASUS Z9 PE D8 WS (SSI EEB board) this site is also used for ordering PC parts (can be used for few countries) it basically searches for the lowest priced components from other different online E stores with various models in your country since you live in the US you could use it, these are some cabinets that are compatible with that motherboard however it can vary depending on what else you decide to put inside:
http://pcpartpicker.com/parts/case/
I recommended the Cosmos two at first since it is heavily modifiable but is costly.
Any other advice be glad to help