PSU sizes are really confusing me! Could someone help?

Solution
Bitfenix specifies a standard PS2 ATX PSU for that case. The term 'PS2' is rarely used now, so it's basically just a regular ATX PSU you need (the motherboard form-factor has little to do with what size PSU you need, it's the case-size & spec which is the determining factor).

That one from Amazon will be fine.
Bitfenix specifies a standard PS2 ATX PSU for that case. The term 'PS2' is rarely used now, so it's basically just a regular ATX PSU you need (the motherboard form-factor has little to do with what size PSU you need, it's the case-size & spec which is the determining factor).

That one from Amazon will be fine.
 
Solution