Owners of GeForce RTX 50 Series graphics cards can use the mVolt+ extreme overclocking utility to bypass standard GDDR7 memory frequency limitations. With its help, the user successfully overclocked the GDDR7 display of the RTX 5070 Ti graphics card from the standard 28 Gbit/s per contact to 39 Gbit/s per contact, increasing its effective frequency by 5500 MHz.
Image source: Overclock3d
Increases speed per pin to 39 Gbps, a 39% improvement. This increases the memory bandwidth from the base 896 GB/s to 1248 GB/s. In this example, the graphics card is equipped with a Samsung memory chip. The overclocking potential of GDDR7 depends on the manufacturer: some mods can be overclocked better than others.
enthusiast report About growth “Every 1000 MHz increase in memory frequency is approximately 1 frame/second” In the game “Cyberpunk 2077”. That is, increasing the frequency by 5500 MHz can increase the frame rate by approximately 5-6 frames per second. The increase is small, but that’s to be expected: the RTX 5070 Ti doesn’t suffer from a lack of memory bandwidth.
In most cases, overclocking memory won’t produce the same dramatic results as overclocking the graphics core. Increasing the memory frequency will increase its bandwidth, but the architecture of most graphics cards initially provides sufficient parameter reserves to ensure the computing power of the chip. Bandwidth shortages only occur with poorly designed graphics cards. This usually applies to models with smaller amounts of memory.
In addition, memory overclocking is more likely to cause system instability. As frequency increases, the number of errors in the memory may also increase, and since GDDR7 has built-in ECC correction, performance may not improve with overclocking, including due to an increase in the number of errors. By the way, enthusiasts do not check the stability of the graphics card after overclocking.
While a 39% memory overclock is impressive, the significant increase in bandwidth does not bring significant benefits. If the graphics card already has enough memory bandwidth, further increase will have little impact. However, the overclocking results clearly demonstrate the potential of GDDR7 memory. The new generation of graphics cards may come with faster GDDR7 modules.
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