Very High Temps i7 7700k with H105

what are the temp of the AIO cooler? when you have situations like this make sure that the cooler is working properly

That CPU is inherently hot, because Intel no longer uses solder between the IHS and CPU die. Your CPU looks close to mine, a moderate overclock capable CPU. There are tricks in BIOS to lower temperatures and voltage, however, by a vast margin the best thing to do is remove the CPU IHS and apply liquid metal.

The following is an image of the hottest I can get my CPU, just a FEW seconds after the benchmark ran. I am using a Noctua U-14S, an air cooler, that is why the CPU temperatures dropped so quickly.

My CPU at 5.2GHz ~1.47 volts ran from 74 to 77 degrees C on a very CPU demanding benchmark, after applying Thermal Grizzly Conductonaut http://www.thermal-grizzly.com/en/products/26-conductonaut-en

There are YouTube videos on how to apply this, although some are better than others. Thermal Grizzly provides instruction for the tool.

NOTE: Cut a tiny portion at the tip of the applicator to let liquid flow slower. For much more flow control, hold the plunger in your right hand between thumb and for finger [at the "wings" on the tube]; that will permit very positive flow control - otherwise the liquid metal can squirt out, a lot of it, and exactly what you do not want. Use very little. Also, cover the resistors on the PCB [that will be covered by the IHS] with liquid tape, or common black electrical tape will work as well [use scissors to cut a small amount, that is all you need].

I use delid, relid tools from Rocket Cool https://rockitcool.myshopify.com/products/rockit-88

I use a very thin line of head gasket maker or any good high temperature silicone with an extended tip applicator in the package. I only put the silicone on two sides of the bottom of the die. I do not cover the entire bottom edge for two reasons. 1.) Two sides is more than enough to secure the CPU to the die. 2.) Any gas buildup has a chance to escape under the sides not covered with silicone [that is the reason Intel leaves a small area with no sealant].

Instructions are at Rocket Cool and can be found on YouTube.com

Without applying liquid metal there is little chance of lowering your CPU temperature further. Take your time and follow instructions and you will accomplish the process successfully.

I hope this helps.