AMD FX-8350 | Temperatures Idle: 30ºC | Temperatures Gaming: 80ºC

Here's a couple of things you can check:
1. Your GPU temps if high can also cause all your components to get hot.
2. If you have overclock, how high is it?
3. A picture of the thermal paste application would be nice but is not necessary
4. How many fans do you have and how are they positioned in the case?

How did you apply thermal paste on you cpu? How many fans do you have in your case? Do you have loose backplate maybe so there's no good contact between cooler and cpu? I had that problem on my h100i and my i7 was hitting over 100C degrees because of the backplate problem.

jesus how much thermal paste did you used? haha you just have to put on the middle of CPU in the size of a pea or rice and press cooler on it before screwing it in and just turn a little right and left so the paste gets over cpu and then screw it in

Alright, here's my thoughts, it seems like the thermal paste application was a bit excessive, it shouldn't be "flowing off your cpu heatspreader, yeah, it's that much. And due to that, you cpu may be overheating, because remember, the less the thermal paste, the better. you could have a bad contact aswell. If you do get time, i'd suggest you take apart the cooler, reapply the thermal paste, but like the size of an uncooked grain of rice, and try again. "If you have the time". And if it can't be done your self, get an experts help. Make sure you clean the cpu with 99-100% isopropyl alochol

I used to own the 8320, basically the same CPU with a lower base clock speed. 30ºC is fine when idle, nothing to worry about there. I'm not sure how hot these processors can get before they begin to have a negative effect on performance, but personally when I had my 8320 and a 212 EVO I never hit 80 in anything as far as I was aware according to what my temperature reading software was telling me. To be on the safe side lets assume 80ºC is a tad too high.

I've read on forums that some of the FX chip boards don't have reliable temperature sensors, so it could just be an incorrect reading, however there are some things I'd suggest you do to see if it solves the issue:

1: First thing to do would be to make sure you have the front fans in taking air, this probably sounds like a simple step and if you never did anything with the fans they'd have been set-up as intake by default on the front, and exhaust at the back, this is how you want the airflow to be, or at least what has always worked for me (some people may argue otherwise).

2: Remove some of the movements on the top of the case and take readings. Once again, another step you may have already tried, but if not, just see if it makes much of a change,

3: If you bought the processor second-hand it's possible that it was over clocked, if this is the case it would explain the high temperatures as the last person to use it may have been water cooling, if it's a new chip however this will not be the case.

4: It's likely that the cooler is not making proper contact with the surface of the CPU. I'd suggest taking off the CPU cooler, removing the thermal paste from the processor and from the bottom on the heat sink (you can buy cheap kits of solution that correctly removes thermal paste on Amazon), also take the processor out and making sure no paste is underneath it. Carefully reseat the CPU and then apply a small amount of thermal paste to the centre of it (look at a video from LinusTechTips too see just how much you should be applying), and then place the cooler on top of the CPU vertically (This is just my preference as it pulls less heat off the GPU, thus keeping the CPU cooler) and make sure the fan is in taking the cool air that is coming in from the front fans of the case. Next carefully tighten the CPU cooler down and make sure it's tight enough that it's making contact, but not too tight to the point where it could damage the CPU.

Boot the system and monitor the temps in different games/benchmarks. If it's still too hot then it could just be a bad chip, if it's still under warranty try get it replaced and this should solve everything. Adding extra exhaust fans at the top of the case and extra intakes may also help a bit too.

The Define R5 doesn't have the best airflow really as it's quite closed off, I personally had one for a week or two before I resorted back to my full tower, and the whole time I did have it I noticed my temps being about 10 degrees higher than my temps in my full tower, taking the moduvents off helped a bit though. It's not a bad case though, and it really shouldn't be the main factor

You used way to much thermal paste. You need to remove the heat sink, clean both the CPU and heat sink with either low water isopropanol alcohol or use a product such as ArctiClean. There is no way if you did it right that the paste would ooze out like that.

Do that and report what temps are you getting But I must agree i had define r5 and case has very bad airflow, when i went from antec gx500 to r5 cpu got 10c degrees hotter and gpu had 4 degrees more. But then i sold everything and had that antec gx500 again and now I have Cooler Master HAF X and temps droped around 7-8c degrees on everything from GPU,CPU SSD and HDD Also my old fx 8350 never got over 45 degrees but i had phanteks PH-tc14pe

Do make sure that the thermal paste you are using does not contain silver or other conductive substances, you are lucky you didn't have a conductive thermal paste when it oozed all over your cpu, that SHIZ CAN FRY YO CPU

HAHAHA! it happens man, i'm glad everything turned out fine what are your temps now?

That's better!

I'm glad i was able to help out