Information about testing software showing incorrect values.
All current reporting software (GPU-Z, HWInfo, ARC Control, 3DMark, etc.) is showing Intel® Arc™ A770 Graphics (16GB) at 16 Gbps GDDR6 speeds (2000 Mhz) and not the 17.5 Gbps GDDR6 (2187 Mhz) that the device is capable of.
To fix this issue perform an update of the Intel® Arc™ Graphics Windows* DCH Driver to the version 31.0.101.3802 or newer.