The Heat Seeker Pro XPT I ordered is a little different than what is shown on the OCH site. The reason for this is because they take custom orders so I took full advantage of this. I choose to go with the "inline" water cooler. This means there is no water reservoir which saves quite a bit of room inside the case. I've also found that ditching the reservoir will not have an impact on cooling power what so ever, not to mention save you a little bit of money. This is mostly due to the fact that the radiator and 1/2 tubing is somewhat of a reservoir and actually holds quite a bit of liquid.