GPUZ doesnt show the memory usage of my 2nd GPU

whatever4d · Jan 18, 2017

hi there,

i got 2x AMD RX 480 8 GB Cards.
GPU z shows only the memory usage of the 1st gpu,
but not of the second.

Can it be that GPU z is adding both GPU memories
and showing it only in the GPU1 as a summary?

kind regards

EarthDog · Jan 18, 2017

Last I recall, it was a combined total, yes. But its been years...

Naki · Jan 24, 2017

whatever4d said:
hi there,

i got 2x AMD RX 480 8 GB Cards.
GPU z shows only the memory usage of the 1st gpu,
but not of the second.

Can it be that GPU z is adding both GPU memories
and showing it only in the GPU1 as a summary?

kind regards

Do you use AMD CrossFire? If so, that is likely the reason.

whatever4d · Jan 24, 2017

i dont use crossfire

P4-630 · Jan 24, 2017

whatever4d said:
i dont use crossfire

Uhmm, just curious, you keep one RX480 as spare?

whatever4d · Jan 24, 2017

i use it for opencl calculation on 2 gpus

Naki · Jan 26, 2017

No idea then. @W1zzard, any comments, please?

@whatever4d, can you send screenshots of main GPU-Z tab for the 2 cards?

whatever4d · Jan 26, 2017

oh my dear, now i see that crossfire is enabled.
i thought i had to connect them physically with a cable to enable crossfire,
like it was in the past with nvidia SLI.

Liviu Cojocaru · Jan 26, 2017

I think these days the connection for crossfire is made through the northbridge chipset

eidairaman1 · Jan 26, 2017

Yes it is since there is no CF cables to mess with now

Naki · Jan 26, 2017

Liviu Cojocaru said:
I think these days the connection for crossfire is made through the northbridge chipset

No, see here:
http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx

Chart is a bit old, no Radeon 300/400 cards listed, but as you can see, some R9/R7 2xx models still use a Crossfire bridge cable.

eidairaman1 · Jan 26, 2017

Naki said:
No, see here:
http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx

Chart is a bit old, no Radeon 300/400 cards listed, but as you can see, some 2xx models still use a Crossfire bridge cable.

that is because the 290 was the first one to not use Crossfire connectors because the 280/X models were 7970/7950s.

Liviu Cojocaru · Jan 27, 2017

Naki said:
No, see here:
http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx

Chart is a bit old, no Radeon 300/400 cards listed, but as you can see, some R9/R7 2xx models still use a Crossfire bridge cable.

Sorry mate, but the latest gen of AMD RX400 graphics cards do not need the bridge anymore, they don't even give you the option because there is no crossfire connection on the card.As you can see the OP has 2 RX 480's

Naki · Jan 27, 2017

Nope.
Yes, AMD Radeon 400 series is the most recent, but many users (including myself) still use 2xx and 3xx series cards.

Liviu Cojocaru · Jan 27, 2017

Naki said:
Nope.
Yes, AMD Radeon 400 series is the most recent, but many users (including myself) still use 2xx and 3xx series cards.

I understand the idea was that the OP has the RX400 series so I was talking about his situation

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Video Card(s)	SAPPHIRE R9 290 Tri-X OC 4GB/MSI RX 480 8GB/SAPPHIRE R9 390 8GB
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GPUZ doesnt show the memory usage of my 2nd GPU

whatever4d

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