Fermi OpenGL performance and RAM questions.

[Anarchist420]

If Fermi is slower under Open GL then why is it slower under OpenGL? Is it a hardware issue or a driver issue?

Also, does Fermi have a different memory architecture than previous Nvidia GPUs or something like that?

 

[Arkadrel]

Do you mean OpenCL?.... and slower as opposed to what? also what software are you talking about? optimisation issues?

Differnt memory architectures? why would that effect OpenCL performance?

Theres no context, kinda makes it hard to even understan what your asking.

 

[Moebious]

Well, if you are talking about OpenGL, it has been proven on OpenGL reviews that it seems that there's issues with OpenGL and Fermi architecture, as games like EQ Wars and Wolfenstein performs much faster on the HD 5870 than on the GTX 580. They should be driver related.

 

[Skurge]

Well, if you are talking about OpenGL, it has been proven on OpenGL reviews that it seems that there's issues with OpenGL and Fermi architecture, as games like EQ Wars and Wolfenstein performs much faster on the HD 5870 than on the GTX 580. They should be driver related.

They better fix it before rage launches, the fact that a 6850 is faster than a 480 on OGL is not something they would to turn a blind eye on for long.

BFG10K can tell you if its driver related or hardware. He does a lot of OGL tests.

 

[Moebious]

They better fix it before rage launches, the fact that a 6850 is faster than a 480 on OGL is not something they would to turn a blind eye on for long.

BFG10K can tell you if its driver related or hardware. He does a lot of OGL tests.

Yeah, kinda strange specially when nVidia dominated OpenGL for so long until AMD got up to par with the X800 and X1K series and then suddenly got the crown in OGL performance. I wish AMD were as consistent with their OpenGL driver on Linux like they do with Windows.

 

[Arkadrel]

http://www.youtube.com/watch?v=8DcKLmZYWFw

Wow... game looks good.
And its in OpenGL?

 

[Moebious]

Yeah, it is based on the version 5 of the ID Tech engine.

 

[Anarchist420]

Thanks BFG10K where are you?

 

[Arkadrel]

Goes to show what I know...I thought OpenGL was dead more or less.
That game looks sweet though.

 

[digitaldurandal]

The reason probably is partially because OpenGL is nearly irrelevant. Very few games use it any more.

I think it also may have something to do with the flip flop in texture fill rates. ATi used to have better shader power and less texture power and in the last two generations this has flip flopped. Maybe this is a factor?

 

[BFG10K]

Fermi definitely has performance issues with OpenGL. There are some instances where the 6850 is faster than a GTX480 (e.g. Doom 3 @ 2560x1600 with 8xMSAA). Apparently nVidia support have confirmed it’s expected behavior from the architecture to at least one person who reported it.

My GTX480 routinely has big performance drops in OpenGL source-ports with elementary rendering tasks such as smoke and other transparent particle effects. These games are in no way demanding.

As for OpenCL, you can’t infer anything about its performance from OpenGL. The two APIs are completely different and tackle a completely different class of problems. As we all know, Fermi has been designed with strong compute performance in mind.

 

[Moebious]

May be they will fix OpenGL issues by the time that Rage arrives.

 

[Arkadrel]

May be they will fix OpenGL issues by the time that Rage arrives.

not if its hardware issue with the architecture.... which it sounds like from BFG10ks answear.

..Apparently nVidia support have confirmed it’s expected behavior from the architecture..

 

[apoppin]

not if its hardware issue with the architecture.... which it sounds like from BFG10ks answear.

according to Nvidia ....

It isn't an issue with Fermi HW. Their rep guaranteed that the OGL performance in Rage will be top notch. He just said it is taking a long time to get their driver team to Wolfenstein and other old OGL games.

i guess in the meantime, "it's good enough"
:whiste:

Now i got to get to benching TriFire-X3; it's been awhile
:awe:

 

[gorobei]

is it only for OGL on games or are the drivers/hardware borked for 3dCG apps like maya/max/etc?

 

[BFG10K]

is it only for OGL on games or are the drivers/hardware borked for 3dCG apps like maya/max/etc?

Pro3D apps are very slow too.

 

[gorobei]

gahh. guess i'll be buying red for my workstation as well as my game machine.

I was willing to wait for nv to get single card triple monitor support since they had very good OGL driver support for 3D apps in the past, but this just jaratees me off.

Very happy to have gotten in on the sapphire eye6 deal. Kinda wish i had bought 2 of them.

 

[PreferLinux]

The reason probably is partially because OpenGL is nearly irrelevant. Very few games use it any more.

I think it also may have something to do with the flip flop in texture fill rates. ATi used to have better shader power and less texture power and in the last two generations this has flip flopped. Maybe this is a factor?

Goes to show what I know...I thought OpenGL was dead more or less.
That game looks sweet though.

OpenGL is far from dead. Nearly all professional 3D software uses it, and Linux and Mac 3D games are all OpenGL.

gahh. guess i'll be buying red for my workstation as well as my game machine.

I was willing to wait for nv to get single card triple monitor support since they had very good OGL driver support for 3D apps in the past, but this just jaratees me off.

Very happy to have gotten in on the sapphire eye6 deal. Kinda wish i had bought 2 of them.

I'd be guessing a workstation card would work fine, as it is designed for that kind of stuff.

 

[gorobei]

I'd be guessing a workstation card would work fine, as it is designed for that kind of stuff.

i've used quadros and the consumer versions of the same card on the same app. the workstation drivers arent really worth the price for what i do. The extra ram is nice but i can live without it on my home machines.

 

[notty22]

I don't think the OP was ever asking about openCL performance.
But there is a benchmark that is circulating and AMD's new driver installs openCL and works with it.
ratGPU v0.4.9 http://www.xnormal.net/ratGPU/

My 460's do the default benchmark in 45 seconds
1 4770 in my htpc does it in 353

A earlier version of the benchmark took 8 minutes using my cpu.

Here is a picture of it off google, to start the benchmark you click the red bars on the upper left of the screen.

 

[digitaldurandal]

OpenGL is far from dead. Nearly all professional 3D software uses it, and Linux and Mac 3D games are all OpenGL.


I'd be guessing a workstation card would work fine, as it is designed for that kind of stuff.

All of those Mac and Linux 3d games. The PC market is such a tiny chunk of industry, Linux and Mac games do not even compare to the number of games PC sell. Most companies do not even bother making them available for Apple.

Nvidia probably has a plan for their own 3d cuda apps so perhaps that is why they ignore that market.

I still say most of their sales are derived from games... on the pc.. and openGL is mostly dead in that arena.

 

[footballrunner800]

So heres a question. If fermi is slower in openGL, is it slower than AMD in MacOS since its all that it uses? I just got a macbook pro and it would be interesting to know if this was one of the reasons that apple switched to AMD.