Hi. I tried a new version of the program. The error just started to manifest itself in a new way: the temperature instantly rises to 90 degrees, the GPU-Z is also the wrong value. At the end of the test also instantly falls to normal values. I tried to run the test for 7 seconds, no longer decided. As a proof, I apply the GPU-Z screenshots and the test result, as well as a fresh program log.
<->[NORMAL]#00000001#Tue Jan 15 22:41:55 2019#FurMark 1.20.3.0 is starting up...
<->[NORMAL]#00000002#Tue Jan 15 22:41:55 2019#FurMark folder: G:\Program Files (x86)\Geeks3D\Benchmarks\FurMark\
<->[NORMAL]#00000003#Tue Jan 15 22:41:56 2019#OpenGL renderer (main graphics card): AMD Radeon RX 590
<->[NORMAL]#00000004#Tue Jan 15 22:41:56 2019#OpenGL version detected: 4.6
<->[NORMAL]#00000005#Tue Jan 15 22:41:56 2019#OpenGL max viewport size: 16384X16384 pixels
<->[NORMAL]#00000006#Tue Jan 15 22:41:56 2019#Device ID string (main graphics card): PCI\VEN_1002&DEV_67DF&SUBSYS_E347174B&REV_C7
<->[NORMAL]#00000007#Tue Jan 15 22:41:56 2019#CPU/System info:
<->[NORMAL]#00000008#Tue Jan 15 22:41:56 2019#- CPU: AMD FX(tm)-8350 Eight-Core Processor
<->[NORMAL]#00000009#Tue Jan 15 22:41:57 2019#- CPU speed: 4000 MHz
<->[NORMAL]#00000010#Tue Jan 15 22:41:57 2019#- System memory: 8148 MB
<->[NORMAL]#00000011#Tue Jan 15 22:41:57 2019#- OS: Windows 7 64-bit build 7601 [Service Pack 1]
<->[NORMAL]#00000012#Tue Jan 15 22:41:57 2019#Detecting GPUs...
<->[NORMAL]#00000013#Tue Jan 15 22:41:57 2019#Found 1 GPUs.
<->[NORMAL]#00000014#Tue Jan 15 22:41:57 2019#- GPU 1: AMD Radeon RX 480
<->[NORMAL]#00000015#Tue Jan 15 22:41:57 2019# - Cores: 2304
<->[NORMAL]#00000016#Tue Jan 15 22:41:57 2019# - Memory size: 8192MB
<->[NORMAL]#00000017#Tue Jan 15 22:41:57 2019# - Memory type: GDDR5
<->[NORMAL]#00000018#Tue Jan 15 22:41:57 2019# - TDP: 150W
<->[NORMAL]#00000019#Tue Jan 15 22:41:57 2019# - Bus ID: 1
<->[NORMAL]#00000020#Tue Jan 15 22:41:57 2019# - Bios: 015.050.000.000/113-2E3470U.X5W (2016/09/21 02:29)
<->[NORMAL]#00000021#Tue Jan 15 22:41:57 2019# - Graphics driver: 25.20.15011.1004
<->[NORMAL]#00000022#Tue Jan 15 22:41:57 2019# - GPU temperature: 51.0°C
<->[NORMAL]#00000023#Tue Jan 15 22:41:57 2019#WARNING: true GPU core and memory clocks for GPU 1 are not available on this platform. Only Pstate clocks will be displayed.
<->[NORMAL]#00000024#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 300MHz - Memory clock: 300MHz - GPU voltage: 0.800V
<->[NORMAL]#00000025#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 608MHz - Memory clock: 2000MHz - GPU voltage: 0.818V
<->[NORMAL]#00000026#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 930MHz - Memory clock: 2000MHz - GPU voltage: 0.831V
<->[NORMAL]#00000027#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 1097MHz - Memory clock: 2000MHz - GPU voltage: 0.962V
<->[NORMAL]#00000028#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 1165MHz - Memory clock: 2000MHz - GPU voltage: 1.025V
<->[NORMAL]#00000029#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 1211MHz - Memory clock: 2000MHz - GPU voltage: 1.075V
<->[NORMAL]#00000030#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 1256MHz - Memory clock: 2000MHz - GPU voltage: 1.125V
<->[NORMAL]#00000031#Tue Jan 15 22:41:57 2019# - PState 0 - GPU clock: 1342MHz - Memory clock: 2000MHz - GPU voltage: 1.150V
<->[NORMAL]#00000032#Tue Jan 15 22:41:57 2019# - Fan speed: 0%
<->[NORMAL]#00000033#Tue Jan 15 22:41:57 2019#no multi-GPU support (1 physical GPUs)
<->[NORMAL]#00000034#Tue Jan 15 22:41:57 2019#GPU monitoring thread started up ok.
<->[NORMAL]#00000035#Tue Jan 15 22:41:57 2019#oZone3D Engine is starting up - kernel build: [v3.4.0 - Dec 29 2018 @ 11:09:53] - codename: Zhadanas
<->[NORMAL]#00000036#Tue Jan 15 22:41:57 2019#oZone3D initialization in progress...
<->[NORMAL]#00000037#Tue Jan 15 22:41:57 2019#oZone3D - OpenGL renderer creation ok.
<->[NORMAL]#00000038#Tue Jan 15 22:41:57 2019#o3RendererOpenGL INFO: OpenGL version: 4.6.13544 Compatibility Profile Context 25.20.15011.1004
<->[NORMAL]#00000039#Tue Jan 15 22:41:57 2019#o3RendererOpenGL INFO: OpenGL Shading Language (GLSL) version: 4.60
<->[NORMAL]#00000040#Tue Jan 15 22:41:57 2019#oZone3D initialization ok.
<->[NORMAL]#00000041#Tue Jan 15 22:41:57 2019#Checking for new version...
<->[NORMAL]#00000042#Tue Jan 15 22:42:16 2019#Render thread - affinity mask set to 0
<->[NORMAL]#00000043#Tue Jan 15 22:44:33 2019#Render thread - affinity mask set to 0
<->[NORMAL]#00000044#Tue Jan 15 22:45:03 2019#Render thread - affinity mask set to 0
<->[NORMAL]#00000045#Tue Jan 15 22:45:53 2019#Render thread - affinity mask set to 0
<->[NORMAL]#00000046#Tue Jan 15 22:48:27 2019#Render thread - affinity mask set to 0
Result test:
https://ibb.co/yRSxyLgScreen GPU-Z:
https://ibb.co/QNCwQ5rOr is that the real temperature? If so, it's really sad.

I checked the temperature on the histogram in AMD drivers - indeed, the temperature rises to 85 degrees instantly and drops just as quickly after the test is completed. In my opinion, the test currently does not work correctly with the frequency of the RX 400 series family of graphics cards. I am ready to take part in tests to solve this problem.