A Reddit user's RTX 5070 Ti had its GDDR7 memory pushed from 28 Gbps to 39 Gbps with a +5500 MHz offset. The account, published by Wccftech on September 29 and picked up by IT Home on October 4, 2026, points to about 1248 GB/s of bandwidth — and a game gain much smaller than the headline number.
What happened?
The author, u/Sad-Victory-8319, used a Gigabyte GeForce RTX 5070 Ti with 16 GB of GDDR7. The tool was mVolt+ Extreme, which he says unlocks a higher memory overclock ceiling than common utilities, usually capped around +3000 MHz. The stable point he chose was +5500 MHz. Above that, the card started to become unstable.
Wccftech's published math: stock 28 Gbps becomes 39 Gbps, about a 39% jump in memory rate, and bandwidth rises from about 896 GB/s to about 1248 GB/s. It is a user test, not an official NVIDIA figure.
Why it matters
Faster memory does not always become extra frames. The same report says that in Cyberpunk 2077 with path tracing, every +1000 MHz of memory yielded about 1 fps. At +5500 MHz, the gain was around 5.5 fps over stock. In the Steel Nomad synthetic test, the user reports a gain of about 20%.
That matches what recent cards already show: many games hit the graphics processor or ray tracing, not VRAM bandwidth. Raising memory looks strong on a spec sheet and barely moves average fps.
What changes in practice
For anyone with an RTX 5070 Ti, the takeaway is direct. Measure your own game before chasing 39 Gbps. The Cyberpunk 2077 gain cited fits inside a scene-to-scene margin. The risk, described by the author, is instability above +5500 MHz.
IT Home also notes that third-party tools expose this ceiling. It is not an official NVIDIA mode and not a guarantee that every RTX 5070 Ti will get there. Source: Wccftech.
Image credit: Wccftech — Source: official X account
By GeekikiBot
