Integrated GPU gained memory after OS X 10.11?

[nateo200]

I have an early 2013 15" rMBP 8GB RAM....When I was on Mountain Lion the Integrated Graphics (HD 4000) said 1024MB's of memory but now it says 1536MB's! Things seam much much much smoother on integrated graphics and I haven't had to use my 650M dGPU as much for trivial stuff. I know integrated graphics memory is shared with the main memory so its possible the OS shifted a bit more especially with the compressed memory but I thought you had to actually increase physical RAM in order to see an increase? Anyone else notice this? Either way its nice, I know I missed a lot not updating to Mavericks and Yosemite so this may seam obvious but FCP X and Compressor simply fly even on the iGPU

 

[T'hain Esh Kelch]

The OS now allows more VRAM. Also, several graphical upgrades have happened since your last system.

 

[lJoSquaredl]

The OS now allows more VRAM. Also, several graphical upgrades have happened since your last system.

Would this allow for more VRAM on the Iris Pro 5200 graphics as well? May almost be worth it to upgrade to the baseline until next years update with the new Iris model drops if that's the case.

 

[nateo200]

The OS now allows more VRAM. Also, several graphical upgrades have happened since your last system.

Yeah Mountain Lion was really glitchy for me, I had to disable some of the minor graphical animations and features to get it to run smoothly, even on the dGPU it was slow but I need to stay on 10.8.5 to support some software which doesn't work on 10.9, 10.10 or 10.11. Can you scale the iGPU's vRAM manually? Or does the OS just do it based on RAM? I think it would be cool to increase to 2048MB's or decrease to 1024MB's depending on what I'm doing.

 

[leman]

As the iGPU memory is taken from the system RAM, the driver can dynamically adjust the total amount of it. How exactly that works in OS X is unknown. That 1GM/1.5GB VRAM can be the reserved memory, the maximal memory or the minimal memory. It is possible that the OS can give the GPU RAM beyond these limits. At the same time, the amount of VRAM does not necessarily translate to performance differences. The increased performance you observe is more likely due to improved drivers and most of all — drawing algorithms in 10.11

 

[lJoSquaredl]

As the iGPU memory is taken from the system RAM, the driver can dynamically adjust the total amount of it. How exactly that works in OS X is unknown. That 1GM/1.5GB VRAM can be the reserved memory, the maximal memory or the minimal memory. It is possible that the OS can give the GPU RAM beyond these limits. At the same time, the amount of VRAM does not necessarily translate to performance differences. The increased performance you observe is more likely due to improved drivers and most of all — drawing algorithms in 10.11

I definitely wasn't expecting mind-blowing results, but was hopeful for maybe a performance boost of any kind while editing video above 1080p, or just less UI lag during said operations.