It's here. Frame rate for GPU doesn't seems to work.
https://www.macupdate.com/app/mac/25230/istat-menus
https://www.macupdate.com/app/mac/25230/istat-menus
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
iStat for NMP
- Thread starter Einz
- Start date
- Sort by reaction score
I think I read that one GPU is dedicated to the display, and the other sort of sits in reserve waiting for an app that takes advantage of it for compute.
I've read that under Bootcamp in Windows using Radeon drivers, the cards behave like Crossfire. That does not seem to be how they work under OSX, by design.
Not sure why? Maybe thermal. Maybe power. Maybe they are serious about using the GPU for compute.
It works that way because that's how apple set up OS X to use multiple GPU's by default. It has nothing to do with the nMP in particular, it's the OS. Any other mac with multiple GPU's will work the same (for now!).
But up to now, wouldn't a second video card usually have a monitor attached directly to it? I have not dorked with multiple video cards in a Mac since the G4/G5 days, but, I only added extra video cards to drive more monitors.
It is a brave new world!
I believe by routing all display duties to one GPU, the other one can be dedicated for compute work without having an impact on display performance and vice-versa. I don't recall the specifics (perhaps using dual GPUs in Luxmark?), but I remember someone complaining of their display performance grinding to a halt when the same GPU was doing heavy compute tasks.
I think it's cool the way Apple has set it up... It's like there's a dedicated GPU co-processor waiting to be used! Now I just need an update to Aperture to unleash it's inner beast on this bad-boy!
Nope.
I've had second video cards installed in previous Mac Pros as a CUDA/compute only device. The Macbook Pros can do this as well.
I just tried out v4.2 on my nMP and there's no CPU temperature there... I got 99 temps but my CPU ain't one. Not sure why they can't pull the value if the Intel Power Gadget can. I also only see a single GPU represented in the CPU pane.
I just tried out v4.2 on my nMP and there's no CPU temperature there... I got 99 temps but my CPU ain't one. Not sure why they can't pull the value if the Intel Power Gadget can. I also only see a single GPU represented in the CPU pane.
Unfortunately, neither Apple nor Intel document their temperature sensors. So developing an app like iStat or XRG involves detecting sensors and making a best guess at the location of that sensor based on some of the properties available.
Well they didn't go a very good job guessing.
As it is, none of the sensors iStat reports are of much use. Fortunately, there's the Intel Power Gadget if you want to know what your CPU temp is.Im using version 4.2 and I have CPU proximity (which is used for the menu heading) and two sets of three GPU readings.I just tried out v4.2 on my nMP and there's no CPU temperature there... I got 99 temps but my CPU ain't one. Not sure why they can't pull the value if the Intel Power Gadget can. I also only see a single GPU represented in the CPU pane.
Yeah, I looked at that too but my CPU proximity shows 40-deg, while Intel Power Gadget says 47-deg... and when it's under load, CPU proximity barely moves, compared to the real CPU temp. So unfortunately, it's useless.
Oh, and when I said it only sees a single GPU, I was referring to the frame count and VRAM buffer under the CPU menu.
Intel Power Gadget doesn't run on a dual CPU machine I wonder if there is a way around this. The download link is here:
http://software.intel.com/en-us/articles/intel-power-gadget-20
Lou
I wonder if there is a way around this. The download link is here:http://software.intel.com/en-us/articles/intel-power-gadget-20
Lou
Attachments
I'm checking out iStat - I think it's wrong on the graphics.
One, it never shows the second D700. Even when running a game that uses it such as Civisilation
Two the memory usage is way too low. Comparing to the OpenGL Driver Monitor tool I can see that on one card there is zero bytes free video memory, and on the other it's mostly unused. iStat shows almost no used memory, so even worse seems to have grabbed the wrong GPU.
One, it never shows the second D700. Even when running a game that uses it such as Civisilation
Two the memory usage is way too low. Comparing to the OpenGL Driver Monitor tool I can see that on one card there is zero bytes free video memory, and on the other it's mostly unused. iStat shows almost no used memory, so even worse seems to have grabbed the wrong GPU.