Why does the GPU-Z show that my graphics card is fake?

[Ryan Liu]

I bought a used NVIDIA Quadro K4000 for video editing.
But the GPU-Z said this Graphics card is fake.
Can someone help me to know why the GPU-Z check it is a fake K4000? Or How can I find out the real model of this graphics card?
BTW driver is ok and all display ports is ok.

 

[jboydgolfer]

The easiest way would be to physically inspect the video card. Taking pictures of the back of the PCB, or removing the heat sink and actually taking a picture of the GPU diode. Faking Software is more common than printing legitimate looking stickers & chip markings, as the chip is lazer etched

 

[eidairaman1]

Take pictures of the heatsink, port layout, white stickers on the back of the board, taking heatsink off, getting a clear picture of you gpu die, the ram chips around it and the text info off of them, post it all here.

Thanks @jboydgolfer

 

[StefanM]

I bought a used NVIDIA Quadro K4000 for video editing.
But the GPU-Z said this Graphics card is fake.
Can someone help me to know why the GPU-Z check it is a fake K4000? Or How can I find out the real model of this graphics card?

Looks like a detection bug in GPU-Z

Open advanced tab / Vulkan
A genuine Kepler GPU shows an installed Vulkan driver.
Fermi or older GPUs would show nothing.

 

[Mussels]

the 'fake' function is new and this is a rare card - could be a false positive

@W1zzard can you have a look?

 

[Voluman]

Shader, rop, tmu counts checked, clocks check, gpudatabase, it is probably false alarm or a really good fake. Or an experienced bios modder can check the bios version is correct.

 

[W1zzard]

At first look this seems to be a false positive.

The GPU is GK106, but GPU-Z thinks Quadro K4000 should be based on GK104

Anyone know if Quadro K4000 is based on GK104 or GK106 ?

 

[Voluman]

Official spec: Quadro K4000 based on GK106.

 

[WikiFM]

At first look this seems to be a false positive.

The GPU is GK106, but GPU-Z thinks Quadro K4000 should be based on GK104

Anyone know if Quadro K4000 is based on GK104 or GK106 ?

According to TPU database is GK106.
https://www.techpowerup.com/gpu-specs/quadro-k4000.c1841

 

[STSMiner]

https://en.wikipedia.org/wiki/Nvidia_Quadro

 

[Deleted member 178884]

The detection software's function to detect fake cards isn't finalized, older cards such as your one or rarer cards may falsely display "Fake".

 

[Salty_sandwich]

Now that could be an issue, so you cant really just trust what GPU-Z say's atm then?

 

[W1zzard]

The detection software's function to detect fake cards isn't finalized, older cards such as your one or rarer cards may falsely display "Fake".

How do you know that? I thought I make GPU-Z

According to TPU database is GK106.

I had it defined as GK104 in GPU-Z, which is why there's a mismatch that triggers the fake detection. Changed now, see the attached build

@Ryan Liu please check if the attached build is working correctly

 

[Deleted member 178884]

How do you know that? I thought I make GPU-Z

Common sense, The function has only been released recently, it's bound to be buggy within the first week, if there were no bugs then your a OP programmer, software is often buggy and people get mad it at for no reason.

 

[maxslo]

Same here, false positive for K2100M also based on GK106.

 

[W1zzard]

Same here, false positive for K2100M also based on GK106.
View attachment 109818

thanks. does the build i attached two resonses up work correctly?

 

[maxslo]

Nope, it behaves exactly the same as 2.14.0

 

[W1zzard]

Nope, it behaves exactly the same as 2.14.0

Are you sure? I thought I fixed the detection code for both K4000 and K2100M

https://www.techpowerup.com/forums/attachments/gpu-z-exe.109501/ This link

 

[maxslo]

Are you sure? I thought I fixed the detection code for both K4000 and K2100M

https://www.techpowerup.com/forums/attachments/gpu-z-exe.109501/ This link

I tested it in the morning, it could be i ran wrong executable, i'll give it another try when i get back home later today.

 

[W1zzard]

I tested it in the morning, it could be i ran wrong executable, i'll give it another try when i get back home later today.

Thanks!

 

[maxslo]

Tried it again, it's definitely still reported as fake with the attached build.

 

[Zfast4y0u]

@W1zzard, why do u bother with that function at all? nvida put stop on fake bios flashes nowdays, and amd too i think, only older cards can be manipulated but who cares, in few years no1 gonna use em anyway, let alone buy.

 

[IceScreamer]

@W1zzard, why do u bother with that function at all? nvida put stop on fake bios flashes nowdays, and amd too i think, only older cards can be manipulated but who cares, in few years no1 gonna use em anyway, let alone buy.

Well it's a great thing to have when buying/selling used cards, as a sort of proof.

 

[W1zzard]

Tried it again, it's definitely still reported as fake with the attached build.

Thanks for testing in private. This is fixed now and the fix will be included in next release

 

[MrGenius]

@W1zzard, why do u bother with that function at all? nvida put stop on fake bios flashes nowdays, and amd too i think, only older cards can be manipulated but who cares, in few years no1 gonna use em anyway, let alone buy.

Did you see how he just fully ignored you? There's a reason for that.