Hi guys, i need second opinion here.. I have combine gaming and a folding rig, with HD 6990, it have been running for few years with reference cooling, it's hot, normal gaming load will reach Temp 85C, with folding load it reach 100C. So i already have EK 6990 water block for few month before i have time to install it last night, but i only have EK 140 Rad. the water cooling will only for the GPU. i use 1 Xigmatek 140 fan to pull out the air. no more room for push fan because small space in casing. from my previous experience building several custom watercooling PC the 140 Rad are quite good so at first i think it will be enough to cool 6990. after preliminary load test the idle temp is low, only around 40C but 5 minutes full load it will reach over 90C and the screen goes blank, with reference cooler sometimes it reach 103C depending on room temp but never cause blank screen. do i need bigger radiator? or something i miss?