Just recently found this list...
...not that I agree in toto but it is a start since every cooler on it is pretty top flight. I doubt any of them though approach the water cooling setups that Mandrake and I use daily and for our forays into the 5.5Ghz land.
http://www.tomshardware.com/faq/id-2181775/big-boy-cpu-coolers.html
I searched for FX-9590 + H-60 water cooling and found this list here. It is supposed to be cpu coolers capable of supporting an FX-8 core cpu somewhat effectively.
6 and 8 core CPUs put out major heat when clocked and loaded. Here is the list of coolers that can keep it under control. Pretty much these are all HUGE double tower air coolers or 240/280mm radiator liquid coolers. A lot of them look the same, and most cost a lot.
Keep in mind that you will also need a strong motherboard.
Antec
KUHLER H2O 1250
be quiet!
Dark Rock Pro 3
Cooler Master
Eisberg 240L Prestige
Cooler Master
Glacer 240L
RL-G24L-24PK-R1
Cooler Master
Nepton 280L
RL-N28L-20PK-R1
Cooler Master
Seidon 240M
RL-S24M-24PK-R1
Cooler Master
V8 GTS
RR-V8VC-16PR-R1
Cooler Master
RR-T812-24PK-R2
Corsair
H100i
Corsair
H105
CW-9060016-WW
Corsair
H110
CRYORIG
C1
CR-C1A
CRYORIG
R1 Universal
CR-R1B
CRYORIG
R1 Ultimate
CR-R1A
Deepcool
Gamer Storm Assassin
Enermax
ELC-LT240-HP
Gelid Solutions
Black Edition
CC-BEdition-01-A
Noctua
NH-D14
Noctua
NH-D15
NZXT
Kraken X60
NZXT Kraken X61
Phanteks
PH-TC14PE (and all the variations)
Prolimatech
Megahalems Rev.B
Raijintek
TISIS
Silverstone
HE02
Silverstone
TD02
Thermalright
Silver Arrow/Extreme/IB-E Extreme
Thermaltake
Water 2.0 Extreme
CLW0217
Thermaltake
Water 3.0 Extreme
CLW0224
Zalman
ZM-CNPS14X
Not sure that I could agree with everyone of those choices as very good for handling an FX-8core processor at 5.0Ghz but the key thing I saw was there are no H-60 or H80 cpu coolers anywhere to be found.
Now Mandrake4565 and I have been helping out with FX processors since they came out an people started coming into the AMD cpu and AMD motherboard sections of OCF forums. We are n0t kidding you about the heat to be dealt with from 4.7Ghz to 5.0Ghz with FX-8 core processors. The very first part of a second that you go in an adjust the cpu multiplier 'manually' you are no longer using the FX processor as AMD designed it to be used. You will effectually turn ON and use all 8 cores ALL the time whereas AMD designed the FX processors to never take the cpu all the way to max clock but ONLY ON up to 1/2 the cores and not ALL cores.
Suffice it to say, you may do as you please, but do not later think to wish to overclock or use the FX-8 core processor in any manner other than as AMD intended. Not like I do with all 8 cores running at my 4.7GHz overclock which is the default speed of an FX-9590 but my cpu is an FX-8350 humping to please.
RGone...