HD 520 vs UHD 620 specs and performance
For gaming, the UHD 620 graphics card is better than the HD 520 in our tests.
By comparing the spec sheets, both the HD 520 and the UHD 620 have the same base clock speed. Despite this, the UHD 620 has a slightly higher boost clock speed. This is a frequency that can be reached if the GPU is cooled sufficiently and has enough power.
In addition, both the HD 520 and the UHD 620 have an identical TDP. TDP (Thermal Design Power) measures total heat output from the chip.
In terms of raw gaming performance in our GPU benchmark, the UHD 620 is better than the HD 520.