Corsair Hydro Series H100i PRO RGB AIO Liquid CPU Cooler, 240mm Radiator, Dual 120mm ML Series PWM Fans, Advanced RGB Lighting and Fan Software Control, Intel 115x/2066 and AMD AM4 compatible

WOW, I did NOT think this would adequately cool an OC'd 9900K based on my experience with a Corsair H100iV2... I was considering a custom loop.I was DEAD WRONG!My system is a delidded 9900k, with Conductonaut liquid metal between silicon and IHS, and Panasonic soft PGS graphene between IHS and this H150i AIO cooler, NOT paste. I've used Gelid GC Extreme, AS5, and MX-4 in the past. Graphene does within 2c of a perfect paste job of Gelid GC, AND keeps temps even across all cores, within 3c of eachother, which is what graphene does best. My CPU is delidded with liquid metal and and OC's VERY well at VERY low voltages.Latest gen Asetek pump design is great; idles cooler, max temps are lower, less pump noise vs last gen in the H100iV2.System specs below. I run it at 5ghz all core 1.283v AVX-2 normally to keep temps under 80c. It hits 80c gaming, benchmarking, or exporting at 5.1Ghz no AVX.9900k 5ghz, AVX-2 at 1.283v delidded9900k 5Ghz, no AVX, 1.312v deliddedCorsair H150i AIO with 3x Corsair ML fansAsus Maximus XI Formula mobo32GB G.Skill 3466Mhz CL16 RAMSamsung 960 Evo NVME 1TB boot4x Samsung 850 Evo 1TB SSD in RAID5EVGA 2080 Ti Black Edition GPUCorsair HX850i PSUCooler Master HAF 932 case (oldschool)All temps averaged, delidded with LM between silicon and IHS. Graphene between IHS and AIO. Steam, Origin, Uplay, MSI Afterburner, RTSS, AI Suite III, Coretemp, EVGA Precision X1, iCue, Asus Aura, and Adobe Cloud running in background. Temps taken after booting and idle after 10 minutes. HUGE case with huge fans, ambient 20c.Games tested, AC Odyssey, FC5, FCPrimal, GTAV, Witcher 3Ambient temps 20c. AIO pumps set to max, same ML fans and fan curves via iCue. Same torque applied to both AIOs on same sheet of graphene (no thermal paste).H100iV2 idle temps average 33cH100iV2 Cinebench max core 81cH100iV2 gaming temps max 71cH100iV2 Premiere Pro 4k 2hr export 82cH100iV2 Intel XTU max 84cGaming average temps 64cH150i idle temps 29cH150i Cinebench max core 69cH150i max gaming temps 62cH150i Premiere Pro 4k 2hr export 69cH150i Intel XTU max 73cGaming average temps 57cEven running with no AVX offset,gaming, all core 5Ghz OC, 1.312v, temps are still lower with the H150i by 2 to 3 degrees Celcius, vs the H100iV2 at 1.285v AVX-2.Amazed it keeps the 9900K this cool, and i am not throttled (current/power/turbo boost time maxxed/IA AC&DC loadline 0.01) in any way, LLC5, CPU current limit 140%.Took a few days to dial it all in, i test with games and 4k/8k exports. So far passed everything including prime95 12 hrs run.I aborted P95 run with H100iV2 due to 87c temps within 10 minutes, H150i stayed under 83c at 8 hours, good enough for me.Anything over 85c for CPU is no bueno in my opinion.Also used/tested a Gigabyte Pro Wifi mobo and MSI MEG mobo, the Asus performed better, VRM temps were surprisingly low, but again, i run lower voltages, and i have a huge case with many fans.

I recently upgraded my system from i5 3570k to 9700k. I reused my old H100i v2 but noticed temperatures were a bit high. Running overclocked at 5.0ghz on PRIME 95 I was topping out 92+ C on several cores after a few short minutes. It's not great for my overclock and not great for my chip life. I decided to upgrade my cooler and I am definitely happy that I did.First off, the size of the H115i pro is much bigger than the H100i v2. Not only is it longer ( 280mm versus 240mm) and slightly wider, the radiator is much THICKER as well. Radiator thickness is an important aspect of cooling, sometimes more so than overall length and width. Even a little bit more thickness adds significant more cooling surface area as it multiplies the extended length and width.Additionally, the pump included in the H115i Pro seems more capable but louder. Holding my ear to the motherboard, there is a lot more noise coming from the H115i Pro pump than the H100i v2. I assume this is because the pump is more powerful and the noise comes with the territory.Speaking of noise, the noise from the H115i Pro fans are SIGNIFICANTLY better than the previous incarnations. The newer "Pro" versions use Corsairs ML or magnetic levitation fans. This means that there is a no contact surface between the spinning surfaces. The previous versions of all Corsair AIOs were all normal sleeve-bearing fans that were very noisy depending on the fan orientation. I previously purchased the H110i (the previous version of the H115i) which used the aforementioned sleeve bearing fans and if the fans were upside down or on its side, the fans were incredibly noisy. I returned it because of this fact. All previous versions of the Corsair AIOs had an annoying habit of spinning up full speed on system startup before the software kicked in and dampened the fans down. The new ML fans spin at a maximum speed of 1200 rpm and at this speed they are almost inaudible to me, the only thing I can hear is a slight humming. At lower settings (performance, balanced, and quiet) they are whisper quiet. The H115i Pro uses 2x 140mm fans versus 2x 120mm on the H100i v2. The larger fans move more air at much lower RPMs and are quieter.Overall, the cooling capabilities of the H115i pro is much better than my h100i v2. With 30 min PRIME 95 benchmark, my H100i v2 had 92, 92, 90, and 93C on four cores cores. With the new H115i, only one core reached 90C after 30 min even after burn in. The radiator temperature stayed flatter for far longer than previously. I am definitely happy with my upgrade and would not hesitate recommending this to others.If this review was helpful for you, please give me a helpful vote. Thanks! :)