I have already bought Thermaltake VD4000BWS LCS Kandalf Full Tower "http://www.thermaltake.com/product/Chassis/fulltower/Kandalf_lcs/vd4000bws.asp" which already has builtin watercooling but I found out the case comes only with one cpu block.
So my questions is:
1. which part of I need to watercool and what do I need to buy.
2. I'm planing to by intermal raid cage to house 4x 3.5" disks but I found out the radiator is placed in the front of the case, so would it be a problem if I replace 3 empty 5.25" disk bays with raid cage ? would that block the airflow?
I have been looking at the specs of your case, as the raid cage will be internal i think your airflow will be ok, as the case is designed to have hdd behind the radiator. So you will need some extra tubing and a cpu waterblock that accepts 3/8” tubing. Possibly a waterblock for your gfx card as well, depends what you want. The only other thing i might add is a larger replacement resevior for improved cooling.
but which resevior you recommend !!! would it work with the pump which comes with case !!!
I don't know which pump it is but the reservoir is not a problem. You can use whatever you want as long as it is placed in a higher location than the pump as gravity needs to do its work .