On April 30th, some users reported that the RTX 4070 they purchased from a certain brand could not be fully identified using GPU-Z software. Details such as core number, manufacturing process, chip area, transistor count, and release date were all unknown, despite it being a genuine product.
After examining the submitted data, TechPowerUp discovered that the RTX 4070 had quietly swapped its core from the original AD104-251 to AD103-175-KX.
A month ago, there were reports that the RTX 4070, RTX 4060 Ti, and RTX 4060 would undergo core changes. The latter two, previously based on AD106 and AD107, will now shift to AD104 and AD106.
This adjustment entails blocking more core units to meet the desired specifications. It's understandable as a way to salvage defective units with low yields.
For instance, the RTX 4070 previously blocked 1792 out of 7680 cores in the AD104, utilizing only 76%.
With the switch to AD103, 4352 out of 10240 cores need to be blocked, 28MB out of 64MB L2 cache will be disabled, resulting in an actual utilization of approximately 57%. The memory bus width will also decrease from 256-bit to 192-bit.
TechPowerUP has confirmed that the upcoming version of GPU-Z will be able to identify the new RTX 4070.
