The GeForce 7950GT should exhibit performance gains over the GeForce 7900GT just from faster clock frequencies - it has all of the same core components as the 7900GT, but is running them 100 MHz faster. The vertex shaders are operating at 570 MHz, and the rest of the core is at 550 MHz. At 700 MHz (1.4 GHz DDR), the memory is 40 MHz faster than the GeForce 7900GT. Below is a chart that lays out all of the 7000 series cards and their Nvidia reference design specifications.
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NVIDIA GeForce Reference Specifications
Row 0 - Cell 0
7950GX2
7900GTX
7950GT
7900GT
7900GS
Process Technology (nm)
90
90
90
90
90
Processor Core
G71
G71
G71
G71
G71
Number of Processors
2
1
1
1
1
Number of Transistors per Processor (Millions)
278
278
278
278
278
Vertex Frequency (MHz)
500
700
570
470
470
Core Frequency (MHz)
500
650
550
450
450
Memory Clock (MHz)
600
800
700
660
660
DDR Rate (MHz)
1200
1600
1400
1320
1320
Vertex Shaders (#)
16
8
8
8
7
Pixel Shaders (#)
48
24
24
24
20
ROPs (#)
32
16
16
16
16
Memory Interface (bit)
256
256
256
256
256
Frame Buffer Size per Processor (MB)
512
512
256
256
256
Memory Bandwidth (GB/sec) per processor
38.4
51.2
44.8
42.24
42.24
Vertices/Second (Millions)
2000
1400
1140
940
822.5
Pixel Fill Rate (# ROPs x clk) in Billions/sec
16
10.4
8.8
7.2
7.2
Texture Fill Rate (# pixel pipes x clk) in Billions/sec
24
15.6
13.2
10.8
9
RAMDACs (MHz)
400
400
400
400
400
Bus Technology
PCI Express
PCI Express
PCI Express
PCI Express
PCI Express
Row 20 - Cell 0
Row 21 - Cell 0
7800GTX 512
7800GTX
7800GT
7800GS AGP
7600GT
Process Technology (nm)
110
110
110
110
90
Processor Core
G70
G70
G70
G70
G73
Number of Processors
1
1
1
1
1
Number of Transistors per Processor (Millions)
302
302
302
302
178
Vertex Frequency (MHz)
550
470
440
375
560
Core Frequency (MHz)
550
430
400
375
560
Memory Clock (MHz)
850
600
500
600
700
DDR Rate (MHz)
1700
1200
1000
1200
1400
Vertex Shaders (#)
8
8
7
6
5
Pixel Shaders (#)
24
24
20
16
12
ROPs (#)
16
16
16
8
8
Memory Interface (bit)
256
256
256
256
128
Frame Buffer Size per Processor (MB)
512
256
256
256
256
Memory Bandwidth (GB/sec) per processor
54.4
38.4
32
38.4
22.4
Vertices/Second (Millions)
1100
940
770
562.5
700
Pixel Fill Rate (# ROPs x clk) in Billions/sec
8.8
6.88
6.4
3
4.48
Texture Fill Rate (# pixel pipes x clk) in Billions/sec
13.2
10.32
8
6
6.72
RAMDACs (MHz)
400
400
400
400
400
Bus Technology
PCI Express
PCI Express
PCI Express
AGP 8X
PCI Express
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