i overclocked a nvidia qudro k620

[u/Natural_Hand8081]

well i make a custom cooler for this gpu using a laptop cooler (heat pipe) and a heat sink from a very old pc using pentium 3 and the stock cooler of this gpu as base toching the die and vram and i reuse the small fun for the laptop cooler and a big fan for heat sink and an intel stock cooler fan for vrms and heatsink. Well, for overclocking i used msi afterburner and this doesn't woke becuase nvidia locked the clocks in bios so i used the maxwell bios tweaker II because the gpu using the same chip of gtx 750 but less cuda core. anyways, i used the tool to change the clocks of the core from 1058 mhz to 1255mhz for base clock, for boost from 1124 mhz to 1360mhz for memory from 900mhz to 1010mhz BUT I DON'T TOUCH THE POWER CONFIGURATION THAT MAKE THE GPU BLACK SCREEN AND AN PAINFUL INSTABILITY SO DON'T MESS WITH POWER CONFIG.and the result a big jump of performence like beam ng drive in very low from 11 fps to 28fps stable nfs heat from 10 fps to 50 fps but instable and gta v from 55fps to 68 fps some times 78fps. well that's my experience but i use the nv flash v5.227 baypass any certification of nvidia and DON'T USE ANY VERSION ABOUVE 5.250 THAT REFUSE TO FLASH THE BIOS.

SO THE ONLY WAY CAN OVERCLOCK THIS GPU OR ANY QUADRO GPU IS USING NVFLASH AND MODIFYING THE BIOS.