Doesn't seem like a safe idea to me, a previous system of mine had a leak with coolant and did damage to a near by chip that ruined the motherboard.
See reviews of different liquid cooling systems first. Although I recommend the corsair h100i. If possible please have a professional install the system to minimize the chance of it leaking.
These items are decreased by creatures during battle, and some can be mined. While you're exploring RuneScape, start a new browser tab or window and navigate to the RuneScape Huge Come back data source web page to examine the costs in gold before you position items in your inventory.