AC vent rad add-on (for summer months)

I’ll preface this with… my cats only know the luxury of living between the temps of 68-71 year round… Energy costs are not bad where I live and I thought I have wasted cold air less than a meter away. Why not just add a rad into the rad for cooling while it’s running.

Setup 7800x3d & 7900 xtx Alphacool 240 top intake rad & Alphacool 360 front intake rad with 7 BeQuiet Silent 4 Pro fans (Pump 1) Alphacool eisstation D5 vpp655 & (Pump 2) Alphacool res with D5 Apex Aqua computer flow sensor

The AC loop is on a budget Amazon ordered Dracaena 120mm rad.

Testing (No AC) All fans were set to inaudible from where I sit on the couch roughly 10 foot away (sub 1,100 rpm) and pumps were both set to 52% flow rate of 145l/h. This is how I like to game with no noticeable sound from the machine in my living room.

One hour of heat soak manor lords hit a max hotspot GPU temp of 78c. This was the standard baseline across all other games tested and my go to heat soaked temp.

(with AC rad without AC running)

Identical fan speeds but a slight increase to both pumps 54% and 62% to achieve identical flow rate. One hour baseline of heat soak again but with the new loop added (more liquid volume and the 120mm rad set within the AC vent with no air moving past. GPU hotspot max 76c. Consistent. Even letting it run well over an hour.

(with AC rad and with AC set to 70 degrees)

Again identical fan speeds and post-AC install pump speeds making it 145l/hr. Water temp at bios after 15 mins 17.1c… good lord. Booted into windows and idle temps after another 15 mins were showing 20c general GPU temp, 29c hotspot, and 30c cpu. Jumped onto manor lords again for well over an hour with continuous AC running never showing GPU hotspot over 59c. While general GPU temps sat around 35c with CPU averaging 40c.

Overall a great success :) huge help to a few folks on here that let me bounce ideas off of them and to modmymods for their input as well!