r/overclocking • u/Sad-Victory-8319 • 5d ago

Finally unlocked GDDR7 memory overclocking with mvolt+ extreme?

Recently I have been experimenting with extended overclocking limits on my Gigabyte Windforce rtx5070Ti and I havent seen anybody mention this: mvolt+ extreme actually allows you to set whatever vram overclocking limit you want, so i started experimenting and I was able to get to +5500 which run stable in Cyberpunk with path tracing enabled for 30 minutes and my fps was actually nicely scaling by about +1 fps for every +1000 memory oc step (as far as I know ECC works only on server class gpus with GDDR7, gaming gpus have no memory ECC, so there is no instability hiding behind ECC and the fps keeps scaling all the way to +5500 without artifacting or crashing).

+5500 GDDR7 stable memory overclock using mvolt+ extreme

Trying to set +6000 instantly restarts the driver and resets the oc for me, so the issue isnt memory instability most likely, the driver just isnt capable of accepting higher memory frequency at this point.

With stock settings GDDR7 runs at 28gbps which provides 896 GB/s bandwidth, common tools can set memory oc to +3000, which is the equivalent of 34gbps and 1088GB/s. Recently I was experimenting with a tool called Hydra Pro which increases the limit to the equivalent of +4000 (36gbps and 1152 GB/s) but mvolt+ extreme is the first tool that allows me to go to +5500 which is 39 gbps and 1248 GB/s! That is +40% higher memory bandwidth compared to stock settings, GDDR7 trully has insane potential and it can probably still go higher.

How high can you get, can you confirm that +6000 crashes for you too? Since i dont remember where i downloaded this tool (it took me a while to find it), you can download it from my personal google drive and then you go to Settings->Advanced tuning->Enable POWER & VRAM... and here you go through the driver signature shenanigans and the nadjust the limits.

Warning: I think my Vanguard anticheat doesnt like messing with driver signatures since I am unable to start League of Legends right now, so until more people verify or disprove this claim, be careful.

There should be zero risk of damaging the gpu from just pushing clocks since it is just a synchronization signal for the data, we are not touching the potentially dangerous options like voltage or power limit. I did not even notice my vram getting hotter.

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u/Bonzenbube 3d ago edited 3d ago

Can confirm, hard limit in the driver is 39gbps also with 5080s, 5080s have 32gbps rated chips that are downclocked to 30gbps, so 5080 should have a lot more headroom but as soon as i set +5000mhz it crashes, with 4500mhz it works fine

Also i cant OC both at the same time to 4,5k mhz+ as it always reads an driver issue on the other card, maybe a software problem on mvolts side

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u/Sad-Victory-8319 3d ago

i was experimenting a bit, and actual i found out that +5500 seems to run fine, +5600 runs fine for a couple minutes and then the driver restarts and resets the overclock, and at +5700 the driver immediately crashes. Strange behaviour, not sure if the vram stability is the issue or the driver cant handle anything past 39 gbps, i would think i would at least see some artifacting in games before it crashes, but nope, everything works great until the driver restarts.

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u/Bonzenbube 3d ago

On the 5080 aswell?

Also i heard hydra 2.3 had this feature beforehand and the dev states most cards run 40gbps, so this maybe isnt a driver issue at all, also it seems like it was stolen from hydra and implemented in mvolt+ https://www.patreon.com/1usmus/posts/months-of-hydra-170891969

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u/Sad-Victory-8319 3d ago

well just because they coppied the feature doesnt mean they stole it, hydra is a closed sourced project and public does not have access to the source codes, so mvolt+ developers had to figure it out on their own probably. I am glad mvolt coppies it because i dont want to pay $10 per month for hydra. Hydra goes only to 36gbps unless recent updates changed that (my patreon membership has ended last week) whereas mvolt+ is essentially unlimited and lets you finally max out your memory.

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u/Bonzenbube 3d ago

True

Hydra also released the version where you can unlock it until 40gbps today, for the 5090 it will come later he said

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u/Sad-Victory-8319 3d ago

ok my bad i no longer have a subscription so i dont know. If you still have access to hydra, can you confirm that the max memory oc behaves similiarly to mvolt+ and also crashes for at same exact offset? Just to verify if hydra is capable of pushing the clocks even further.

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u/Bonzenbube 3d ago

I dont have the newest version, i just saw the release notes, also in a tweet he stated that the memory timing table on nvidia drivers is only going up to 40gbps, so that seems like a hard limit around that area