Conclusion

Corsair's Hydro coolers may already be very popular but the company is not resting on their laurels, continuously improving their products. The latest H80i GT and H100i GTX coolers were designed to surpass the previous H80i and H100i, both in terms of performance and of design. The new coolers feature an aesthetically improved design and the inclusion of RGB lighting on the main block's top. Users should be careful regarding the compatibility of these coolers with their case/systems. The H100i GTX is fairly standard and should fit inside most cases that has two adjacent 120 mm fan slots, unless if the presence of a radiator was not considered at all and there is not enough clearance for it. However, the H80i GT has a thick radiator and two 120 mm fans, measuring nearly 100 mm thick when assembled. This requires a lot of clearance and must be carefully considered, as even if it attached to the rear of a typical Mid-Tower case, it will probably cover a large portion of the motherboard and most of the CPU socket.

The generational performance improvement was surprising for the H100i GTX. We did not really expect it to surpass the H100i by a measurable amount, but it did. It actually surpassed the performance of much louder AIO coolers and even coolers with 280 mm radiators. With the supply voltage reduced to 7 Volts, the H100i GTX does not come at the top of our charts but is only surpassed by the Nepton series coolers, which are exceedingly loud even with this low a supply voltage.  

For a design with two fans in a push-pull configuration, we expected the H80i GT to somewhat close the gap between 120/140 mm and 240/280 mm radiator AIO coolers, as the similarly designed (and terribly loud) Cooler Master Nepton 140XL manages to do. However its performance mode failed to impress us, with the H80i GT being only slightly better than other similarly sized options. However, with the supply voltage reduced to 7 Volts, the performance H80i GT improved relative to the rest of the coolers. This is due to the use of the two 120 mm fans in a push-pull configuration, which ensures that the total pressure is high enough maintain fair airflow across the thick radiator even when the speed of the fans is reduced. 

The only actual drawback of these coolers is that they are loud if running at their maximum speed (or, if set from the Corsair Link software, the "performance" mode). Still, the H100i GTX may be loud but it manages to come at the top of our performance charts. The H80i GT is equally loud but its performance does not justify such noise levels. If size is not an issue, Corsair's own H90 offers similar performance at much lower noise levels. At their "quiet" mode, the noise level of both coolers is audible but tolerable for everyday use.

The MSRP pricing of the H80i GT and the H100i GTX is $130 and $150 respectively. However, we found them retailing for significantly less ($90 and $105 respectively), making them a much more appealing deal. Even if only for the Corsair Link support and the flexibility it offers to the users - allowing them to program their own thermal profiles and completely control the noise/performance ratio of their system - the H80i GT and the H100i GTX are excellent deals. If there is enough space for a 240 mm radiator, we strongly suggest the H100i GTX for its noticeably better performance, but the H80i GT will be a fine addition to systems with just a 120 mm fan slot.

Testing Results, Low Fan Speed (7 Volts)
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  • hapkiman - Monday, November 16, 2015 - link

    I recently used the H80i GT in a new Skylake i7 6700k build and I am very happy with it. Very happy! It is quiet as a mouse and was relatively easy to install. I have a large Corsair Air 540 case, so the size of the unit was not an issue for me. I'll have to say that I am still old school and don't trust that factory TIM they pre-apply. I always remove it with alcohol and apply a pea sized dollop of MX-4 on the CPU die before mounting the water block. I am amazed everyday when I use this rig that it idles so cool. Right now RealTemp shows 14/13/12/15 (C). Absolutely great cooler. One thing you didn't realty talk too much about was the Corsair Link software. This software caused a slew of issues for me, including crashes, lockups/freezes, and a dozen errors in my Event Viewer. I uninstalled and reinstalled the software until I finally got fed up with it and completely uninstalled it and detached the USB cable from the pump. The cooler works great as I already stated, and I can still control the fans in my BIOS so no biggie I guess, but this Corsair Link leaves something to be desired. It's buggy and not worth the headache to have a multi-colored logo on the pump.
  • HollyDOL - Monday, November 16, 2015 - link

    What was your ambient temperature (give or take) while you measured those temperatures? Because 12-15°C sounds more like a peltier+compressor cooler...
  • hapkiman - Monday, November 16, 2015 - link

    Ambient in my office is about 21C or around 70F. I know - my best friend didn't believe me either and he came aND SAW.
  • hapkiman - Monday, November 16, 2015 - link

    Oops soory cut off answer there. It has to be a combination of this cooler working great, an extremely cool running processor, and my basement office staying cool 24/7. It's about 75F outside right now and my office is still around 20-21C and my idle temps are 15/13/12/13 C. It is AWESOME!
  • HollyDOL - Tuesday, November 17, 2015 - link

    I rather suspect there is something wrong with your measurement tool (does CoreTemp64 show same values?), otherwise you are 6-9 degrees below ambient (which shouldn't be possible without forced cooling). Such a temperature difference quite rings water condensation warning bells, depending on humidity and air flow around cpu block.
  • maximumGPU - Tuesday, November 17, 2015 - link

    Yeah sorry to burst your bubble but there must be something wrong with the measurement as HollyDol suggested. You cannot have lower temps than ambient with an AIO!
  • Beararam - Tuesday, November 17, 2015 - link

    Real temp is drunk. At the risk of being redundant, no AIO is going to get you below ambient. Not possible.
  • hapkiman - Tuesday, November 17, 2015 - link

    Ok - so I rechecked with AIDA 64 Sensor Panel and it shows temps a little higher, but still very good. Real good. Still below 20C. The digital thermometer on my wall next to a window reads 20C.

    17/18/15/16 on Aida 64 Extreme sensor panel.
  • hapkiman - Tuesday, November 17, 2015 - link

    http://i1116.photobucket.com/albums/k561/hapkiman/...
  • HollyDOL - Wednesday, November 18, 2015 - link

    okay, that's officially weird. I'd be tempted to put thermometer on cpu block to get alternate readings. And, if it is still that low, sell that cpu back to Intel for lots of $$$.

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