Based that your running this on a laptop, I doubt you'll get any faster. Your GPU only has 80 Stream Processors compared to say a Radeon 5870 which has 1600 or a Radeon 7970 which has 2048.
http://www.amd.com/us/products/notebook/...00m.aspx#2
[See Specifications Tab]
Compare this with the Mobility 6990 Radeon on that page, it has 1120 Stream Processors now that's a laptop for GPU cracking
http://www.amd.com/us/products/notebook/...00m.aspx#2
[See Specifications Tab]
Compare this with the Mobility 6990 Radeon on that page, it has 1120 Stream Processors now that's a laptop for GPU cracking