will GeForce GTX 680MX be any good?

[Juan Salvo]

Probably. 650m is pretty good. 680m should be better. For a mobile chipset that is. 🙂

Colorist | Online Editor | Post Super | VFX Artist | BD Author

https://JuanSalvo.com

[Paul Jay]

CUDA will be very happy.

[Margus Voll]

If it performs well then it will be good setup for home and looks creation.

But seems good for imac / mobile platform.

—

Margus

https://iconstudios.eu

DaVinci 9, OSX 10.7.4
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro

[Rick Lang]

The NVIDIA GTX 680M has 1344 CUDA cores I believe. Was not able to find any reference to the 680MX even on NVIDIA’s web site. Looks like either an Apple exclusive for some time or just Apple was allowed to announce the product before it actually ships presumably in December 2012. The “X” in the name means it’s designed for gamers. That could be good as it may mean either even more CUDA cores and/or faster clock speeds. It should be very respectable in its performance in Resolve for example with 2GB of graphics memory. Nothing close to the performance of the Mac Pro (late 2013), a mythical beast, but the best you can find in terms of a mobile GPU. I’ll post again if I learn of the specs for the 680MX.

Rick Lang

iMac 27” 2.8GHz i7 16GB

[Margus Voll]

So in some sense makes it all really exiting. Of course it will not replace big systems but
gives probably better performance compared to MBP.

This was my initial point.

—

Margus

https://iconstudios.eu

DaVinci 9, OSX 10.7.4
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro

[Rick Lang]

[Margus Voll] “So in some sense makes it all really exiting. Of course it will not replace big systems but
gives probably better performance compared to MBP.”

The GT 650M in the Macbook Pro uses 384 CUDA cores which is less than 30% of the 1344 cores in the GTX 680M. And only 1 GB of graphics memory, so it would appear the new iMac can be very useful.

Rick Lang

iMac 27” 2.8GHz i7 16GB

[Juan Salvo]

The number of cores are not a particularly good indicator of performance in the Kepler world. The 680MX will undoubtedly be a better performer than the 650M, but I wouldn’t be so sure it would be THAT much better.

Colorist | Online Editor | Post Super | VFX Artist | BD Author

https://JuanSalvo.com

[Rick Lang]

[Juan Salvo] “The 680MX will undoubtedly be a better performer than the 650M, but I wouldn’t be so sure it would be THAT much better.”

Agreed! I think Apple claims up to 60% faster but they’re not referencing what exactly is faster. The web site shows graphics performance improvements for games but does not illustrate productivity or ‘pro’ applications. We’ll just have to wait until December I suppose when the machines will be put to the test here. I’m still unable to find exactly what constitutes a GTX 680MX and somewhat surprised no third-party ‘news’ site has even picked up on the fact that the product doesn’t really exist i.e. it’s not described and published anywhere on a publicly accessible web site other than Apple’s mention of it.

Rick Lang

iMac 27” 2.8GHz i7 16GB

[Margus Voll]

so we could speculate at least quadro 4000 performance for home users?

—

Margus

https://iconstudios.eu

DaVinci 9, OSX 10.7.4
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro

[Rick Lang]

[Margus Voll] “so we could speculate at least quadro 4000 performance for home users?”

Difficult to know until we see what it includes (still doesn’t exist on NVIDIA’s public web pages). Assuming the 608MX is better than the 680M, then we are comparing devices with at least 1344 CUDA cores tp 256 cores on the Quadro 4000. 680M bandwidth is 115 GB/s versus 4000’s 90 GB/s. 680M OpenGL version is 4.1; 4000 supports 4.3! No idea what Shader Model is on the 680M.

NVIDIA’s web site is very strange, constant apples to oranges hyperbole so you supposedly get caught up in the enthusiastic claims for each product but impossible to compare between product families. And then there’s the reality of what Apple does to get the GPU into their iMac which may not reflect 100% of what NVIDI offers for a given product.

Best to wait a couple of months and Bare Feats will likely have it benchmarked!

Rick Lang

iMac 27” 2.8GHz i7 16GB