Quadro 4000 mac Lion 10.7.3 Driver

Guys Finally Nvidia has released!

http://www.nvidia.com/object/macosx-270.00.00f01-driver.html

QUADRO & GEFORCE MAC OS X DRIVER RELEASE 270.00.00

Version:
270.00.00f01
Release Date:
2012.02.27
Operating System:
Mac OSX Lion 10.7.3
Language:
English (U.S.)
File Size:
31.0 MB

RELEASE HIGHLIGHTSSUPPORTED PRODUCTSADDITIONAL INFORMATION
CUDA Application Support:
In order to run Mac OS X Applications that leverage the CUDA architecture of certain NVIDIA graphics cards, users will need to download and install the CUDA 4.x driver for Mac located here.

New in Release 270.00.00f01:

Contains performance improvements and bug fixes for a wide range of applications.
Release Notes Archive:

This driver update is for Mac Pro 5,1 (2010), Mac Pro 4,1 (2009) and Mac Pro 3,1 (2008) users only.
If you would like to be notified of upcoming drivers for Mac OS X, please subscribe to the newsletter.
Supported Language
Chinese(simplified)
Chinese (traditional)
English
French
German
Italian
Japanese
Korean
Russian
Spanish

I downloaded “CUDA-Z” application.
I found under performance, that the memory copy “Device to Device” is 34.2539GiB/S.
Why does it working on half speed?
(I am using MacPro 3.1)
Which is the best benchmark application for this card?
Thx.

CUDA-Z.png