Quote Originally Posted by mascaras
the scores were this:

7900GT SLI -- 3dmark 2003 >>>23340 all default @CPU 1800Mhz /VGA default


7900GT --3dmark 2005 >>> 8580 (only get single 7900 score maybe drivers issue) all default @CPU a 1800Mhz //VGA default


7900GT --3dmark 2006 >> 4635 (only get single 7900 score maybe drivers issue) all default @CPU a 1800MHZ //VGA default



7900 GTX Specification

Core Clock: 650 MHz
Mem Clock: 1.6 GHz
Memory Bandwidth: 51.2 GB/s
Memory Size: 512 MB / 1024 MB
Pixel Pipes: 24



7900 GT
* PCIe native
* 450MHz core frequency
* 256-bit memory interface
* 42.2GB/sec. memory bandwidth
* 10.8B pixels/sec. fill rate
* 940M vertices/sec.
* 24 pixels per cycle
* Built in dual-link DVI support for 2560x1600 resolution
There is quite an easy way to compare graphic cards independently from the system that you are using, using the following calculation:
(Mem BW*Fill Rate*Vertices/sec)exp1/3 where all three parameters are expressed in 10exp9

The standard 7800GT (400/1000) will give you
(32.0*8.8*0.7)exp1/3 = 5.8

The 7800GTX (430/1200) gives
(38.4*11.3*0.86)exp1/3 = 7.2

The 7800GTX512 (550/1700)
(54.4*13.4*1.1)exp1/3 = 9.3

The 7900GT (450/1320)
(42.2*10.8*.9)exp1/3 = 7.5

The 7900GTX (650/1600)
(51.2*15.6*1.3)exp1/3 = 10.1

The 7900GT and 7900GTX figures are just based upon the info from Mascaras.
If these are correct, the conclusion is that the 7900GT is 4% faster as the basic 7800GTX and that the 7900GTX is 40% faster as the basic 7800GTX and 9% faster as the 7800GTX512.