Blur Busters Forums

what about this guys, how does this feels to you?
navige to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvlddmkm\Parameters change DmaRemappingCompatible from 1 (3 was my case even its undocummented value) to 0 , restart and post if its doing nothing or something.

In Windows, the DMA remapping setting works as follows:

3 (Auto): Windows automatically manages DMA remapping.
0 (Disabled): Disables DMA remapping, which can slightly lower latency during address translation.
1 (Enabled): Forces DMA remapping to be enabled, prioritizing memory protection.
Disabling it (setting to 0) might reduce latency a bit, but for gaming, leaving it at 3 (Auto) is likely the best option. Still, you can experiment to see if changing it makes a noticeable difference.

does amd have it?

yes. Be cautious: Disabling remapping can have unintended effects, depending on the type of remapping in use.

ahead wrote: ↑

12 Jan 2025, 22:43

yes. Be cautious: Disabling remapping can have unintended effects, depending on the type of remapping in use.

so if i want to test what should i do?

and is this path only for nvidia users ?
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvlddmkm\Parameters

Everything is simple; the result can be the opposite of what you expected.

ahead wrote: ↑

13 Jan 2025, 07:21

Everything is simple; the result can be the opposite of what you expected.

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DmaRemappingCompatible to 0 -> 1 -> 2.

ahead wrote: ↑

14 Jan 2025, 20:47

DmaRemappingCompatible to 0 -> 1 -> 2.

i ask you about the reg path i dont even have it ?

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvlddmkm\Parameters