All of our hardware has the specifics listed on their appropriate webpage. You can visit www.thermaltakeusa.com and browse the products there.
For motherboards, we follow an industry-standard guide for spacing, the ATX format. All specifications, including width and length, are listed for each form E-ATX, ATX, Micro-ATX, Mini-ITX. Choose your case accordingly. Since most E-ATX motherboards are not standardized, we cannot be certain of fitting. Most of our cases will tell you the exact measurements that are supported by each form factor. Always check specifications for measurements.
If you decide to go with a smaller case that happens to support E-ATX sizing, be aware that sometimes grommets get covered which can limit cable management. Also, even when the sizing is the same, there may be mounting points that do or don't get used depending on the manufacturer. See the specifications example below.
For graphics cards, each length limitation is listed in the specifications. Do not worry about width, as width is not normally an issue due to the side panel having extra clearance. Do take note however of how many IO spaces will be used, some GPUs use up to 4 IO slots, and not all cases will support it. This can be checked using the gallery and looking at the back of the case.
For PSU, double-check to make sure they are ATX form factors and make sure they fit the length limitation on the webpage.