Suddenly the speed of RPCS3 get low on Win10

Suddenly the speed got lower and could not beyond 10fps When I was playing the 2nd SRW OG with Vulkan. I tried other games, OMG! All of them run on low speed on RPCS3 with 35% CPU usage!!! What happened??
I couldn't find any trouble in steam games. What's wrong??!!!
i7 5820k OC4.0Ghz / GTX980Ti /32GB DDR4 2133/256G SSDX2+4TB HDD

Fatal error
---------------------------
Unhandled Win32 exception 0xE06D7363.
Exception address: 00007ffbbb1a9e08.
ExceptionInformation[0x0]: 0000000019930520.
ExceptionInformation[0x1]: 00000000038f3f40.
ExceptionInformation[0x2]: 00007ffb886c0d00.
ExceptionInformation[0x3]: 00007ffb88650000.
Instruction address: 00007ffbbb1a9e08.
Function address: 00007ffbbb1a9da0 (base+0x69da0).
Module name: 'KERNELBASE.dll'.
Module base: 00007ffbbb140000.
RPCS3 image base: 0000000000010000.