5900 ZT support was added with 61.72.

I think this edition of FX 5900 is new to me.

I also have an MSI 5900 SP, which isn't even listed on Wikipedia. Leave it to NVIDIA to go nuts and flood the market with a dozen or more suffixes. I think some manufacturers started to make up their own.

I have a 5900ZT. How can I help you figure out the core? What data do you need?

Check what GPU core it uses in HWiNFO. Also confirm the 3D core clocks from the NVIDIA display panel after installing the coolbits registry key. The core clocks reported by HWiNFO one display the 2D clockspeed.

Thank you.

It is reported as NV38 by HWiNFO.
Nvidia Display Panel reports it as an 'NV35 Board'.
GPU is at 325MHz, VRAM at 350/700MHz.
The card is also an MSi MS-8937.

That's interesting that your display panel says NV35. Mine says NV38. But yours also reports as NV38 by HWiNFO.

I wonder how the software detects this.

afaik nv38 and nv35 are the same with perhaps different binning and higher stock voltage for 38 (for the higher clock), so maybe software will just not detect properly on less common cards?

I have found that for NV35 + NV36 + NV37 + NV38 the reported Chipset ID is often not as expected.

Kahenraz wrote on 2022-03-27, 19:13:

I wonder how the software detects this.

There are at least 3 different ways to get the Chipset ID for NVidia cards:

1. Call NvAPI_GPU_GetShortName() which returns a string.
2. Call NvAPI_GPU_GetArchInfo() which returns the binary Chipset ID.
3. Read offset 0 from BAR 0 which returns the binary Chipset ID.
4. For both #2 + #3 you need a lookup table to convert the binary Chipset ID to the appropriate string.

I decided to display the results of all 3 methods and am wondering what NvAPI_GPU_GetShortName() will report for the GeForce FX 5900 ZT.