Quadro 4000
Total Frame Buffer 2 GB GDDR5
Memory Interface 256-bit
Memory Bandwidth (GB/sec) 89.6 GB/s
GTX285
Standard Memory Config 1024 MB GDDR3
Memory Interface Width 512-bit
Memory Bandwidth (GB/sec) 159 GB/s
I think people are attaching a little too much significance to the word "Quadro"
Do the math folks...the GTX285 has almost TWICE the memory bandwidth.
You are basically hoping that a 4 Cylinder Ferrari will be faster than an 8 cylinder Corvette because "Ferrari" sounds better than "Chevrolet".
On a Mac, there is ONE set of drivers. All Nvidia cards in similar family use same one. So unless the Quadro is delivered with Magic Fairy Dust, it will be constrained by the laws of electronics as we know them.
If you think the Quadro has magical drivers that will allow it to toss aside the reality of constrained bandwidth, read up on Nvidia's site what other cards those drivers are for. (Hint...GTX285 is on the list)
There are some Scientific uses of double precision floating point that Fermi may handle better, but for raw 3D throughput, you are seriously kidding yourself if you think the Quadro 4000 is going to offer some Great Leap Forward. Or even be able to catch a glimpse of the GTX285's tail lights.
On the other hand, those Fermi drivers are also making a GTX480 roar in my Nehalem. There is every reason to expect a consumer lever Fermi card in next 8 months using these same drivers.
GTX580
Standard Memory Config 1536 MB GDDR5
Memory Interface Width 384-bit
Memory Bandwidth (GB/sec) 192.4
Here are specs for GTX480:
Standard Memory Config 1536 MB GDDR5
Memory Interface Width 384-bit
Memory Bandwidth (GB/sec) 177.4
And the GTX470:
Standard Memory Config 1280 MB GDDR5
Memory Interface Width 320-bit
Memory Bandwidth (GB/sec) 133.9
For an idea how important that Memory Bandwidth number really is:
http://www.barefeats.com/nehal11.html
You'll note the $500 GTX285 mopped the floor with the Quadro 4800 which costs 3 times as much. Your extra $1K got you some nifty stickers but the guy rendering with the GTX285 will be finishing his renders faster and going home sooner.
http://arstechnica.com/apple/news/2009/12/a-second-look-at-the-nvidia-quadro-fx- 4800-mac-edition.ars/3
When the consumer Fermi GPU arrives, get excited. Until then, the GTX285 will remain King of CUDA for Mac.