Here are the versions, voltage and speed for ATI graphic cards which might be helpful to you :
Graphics Controller AGP Specification AGP
Signaling AGP Speeds
Supported
1.0
2.0
3.0
PC AGP Products
RAGE IIC1
3.3V1
PCI-661
RAGE PRO/RAGE
PRO TURBO
3.3V
2X
RAGE LT PRO
3.3V
2X
RAGE XL
3.3V
2X
RAGE 128
3.3V
2X
RAGE 128 PRO
3.3V, 1.5V
2X, 4X
RAGE FURY MAXX2
3.3V2
2X2
RADEON
3.3V, 1.5V
2X, 4X
RADEON 7000
3.3V, 1.5V
2X, 4X
RADEON 7200
3.3V, 1.5V
2X, 4X
RADEON 7500
3.3V, 1.5V
2X, 4X
RADEON 8500
3.3V, 1.5V
2X, 4X
RADEON 9000
3.3V, 1.5V
2X, 4X
RADEON 9100 3.3V, 1.5V 2X, 4X
RADEON 9200
3.3V, 1.5V, 0.8V
2X, 4X, 8X
RADEON 9500
3.3V, 1.5V, 0.8V
2X, 4X, 8X
RADEON 9550 1.5V, 0.8V 4X, 8X
RADEON 9600 PC/MAC
1.5V, 0.8V
4X, 8X
RADEON 9700
3.3V, 1.5V, 0.8V
2X, 4X, 8X
RADEON 9800
1.5V, 0.8V
4X, 8X
RADEON X700 1.5V, 0.8V 4X, 8X
RADEON X800 3.3V, 1.5V, 0.8V 2X, 4X, 8X
RADEON X1300 3.3V, 1.5V, 0.8V 2X, 4X, 8X
RADEON X1600 1.5V, 0.8V
4X, 8X
RADEON X1650 1.5V, 0.8V
4X, 8X
The HD Series products from the 2000 series and up
FireGL AGP Products
FireGL 1
3.3V
2X
FireGL 2
3.3V, 1.5V
2X, 4X
FireGL 3
3.3V, 1.5V
2X, 4X
FireGL 4
3.3V, 1.5V
2X, 4X
FireGL 8700
3.3V, 1.5V
2X, 4X
FireGL 8800
3.3V, 1.5V
2X, 4X
FireGL T2-64 1.5V, 0.8V 4X, 8X
FireGL T2-128
1.5V, 0.8V
4X, 8X
FireGL Z1-128
1.5V, 0.8V
4X, 8X
FireGL X1-128
1.5V, 0.8V
4X, 8X
FireGL X1-256p
1.5V, 0.8V
4X, 8X
FireGL X2-256 1.5V, 0.8V 4X, 8X
FireGL X2-256t
1.5V, 0.8V
4X, 8X
FireGL X3-256 1.5V, 0.8V 4X, 8X
1 The RAGE IIC AGP is capable of AGP Frame operation with no other AGP functionality implemented. “PCI-66” refers to the baseline AGP clock cycle. This is also occasionally referred to as “AGP 0X”.
GRAPHIC CARDS 