MP 7,1 Unusual High GPU Memory Mac Pro

[yugioh5d]

Hi, so I have iStats 6 installed, and I looked into the GPU memory and it looks like this:

I just got the machine (580x graphics), haven't install much yet, I mostly left it on sleep mode and all I did was browsing Firefox . What could the problem be? Faulty GPU? Bug in OS (10.15.3)? Or bug in iStats itself?

 

[bob_stan]

While I have a VegaII installed, my iStats GPU graph remains flat during periods of little or no activity so I doubt it is an iStats bug.

 

[h9826790]

That's normal, all modern web browser use VRAM to accelerate.

Anyway, you pay the VRAM to work, but not sits idle. It's good to see that the software engineers found a way to utilise the hardware you have.

 

[yugioh5d]

On my laptop (10.13.6 - High Sierra), the GPU memory doesn't seem to go up at all. On the Mac Pro, after closing Firefox, it seems to drop back down to around 40%. I'll continue to test it to see if there is any performance impact. Is there any chance that it could be a faulty/bad GPU?

 

[h9826790]

Is there any chance that it could be a faulty/bad GPU?

From your description, pretty sure not a faulty GPU.

 

[osin]

I was thinking about writing a similar post.
After watching iStat for few days, and installing an additional GPU, I believe that if you connect a display to a 580X via USB-C your GPU RAM is being used more. I have two displays connected via USB-C and 580X’s RAM usage is almost maxed out. The moment I connect one of the displays to another GPU, 580X’s RAM is somewhat freed up and the “clock” usage goes down.

 

[ibuick]

The Radeon Pro VEGA II Duo does not have those symptoms

 

[h9826790]

I was thinking about writing a similar post.
After watching iStat for few days, and installing an additional GPU, I believe that if you connect a display to a 580X via USB-C your GPU RAM is being used more. I have two displays connected via USB-C and 580X’s RAM usage is almost maxed out. The moment I connect one of the displays to another GPU, 580X’s RAM is somewhat freed up and the “clock” usage goes down.

All AMD GPU works like that.

When multi monitors connected, the memory clock speed will stay high. And of course, more monitors will consume more VRAM.
[automerge]1583483484[/automerge]

The Radeon Pro VEGA II Duo does not have those symptoms

Can you see the Radeon Pro VEGA II Duo video memory clock speed?

 

[darthaddie]

I am seeing around a constant 18-25% GPU memory use without any app running. like nothing except iStat Menu
I checked the activity monitor and there seems to be nothing of interest there as well.
2 background apps are Google Backup Sync and Backblaze. Both idle.
CPU idles at 1%, GPU idles at 0.5-1% but GPU memory is constant 18-25%

Is this normal?

Mac Pro late-2019 12c / Radeon Pro Vega II Duo / 96GB

 

[pingchp]

Same here. MBP 16" 5500M with Two External 4K Display and using Chrome.