This site has all the ATi Drivers since Catalyst 3.8

It benchmarks the following drivers
Catalyst 4.8
Catalyst 4.7 / Omega 2.5.58 / DNA 2.7.4.7 / Forsage 4.7 / Unian 4.7
Catalyst 4.6 / Omega 2.5.51 / DNA 2.6.4.6 / Forsage 4.6 / NGO 1.5
Catalyst 4.5 / Omega 2.5.44 / DNA 2.5.4.5a / Forsage 4.5 / NGO 1.4a / Unian 4.5
Catalyst 4.4 / Omega 2.5.36b / DNA 2.4.4.4
Catalyst 4.3 / Omega 2.5.30 / DNA 2.2.4.3
Catalyst 4.2 / Omega 2.5.22 / DNA 2.1.4.2a
Catalyst 4.1 / Omega 2.5.14 / DNA 2.0.1.4
Catalyst 3.10 / Omega 2.5.04 / DNA 1.9.3.1a
Catalyst 3.9 / Omega 2.4.96c / DNA 1.8.3.9a
Catalyst 3.8 / Omega 2.4.87 / DNA 1.7.3.8

Really its really worth a lookie-lookie
http://www.rage3d.de/test.php?go=test&nr=0000027

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P4 Northwood 2.8Ghz 800Mhz FSB, i875P, 1.5gb DDR400, Radeon 9800(R350)
Aquamark3 Score: 47,825
Steam, Xfire: Sepht
You need at least 1 server (you know, the black ones) -Cowgoboom
Sepht do you take pride in making others Feel... How should i say this... Retarded? -Silent Archer