Mobile chipset for Core 2 Duo. Unable to accelerate Full HD 1080P Blu-ray video due to lower video engine clock. Zaatharen's chip: Intel GL40Intel GL40 Compaq Presario CQ56 motherboardCompaq Presario CQ56 motherboard Compaq Presario CQ56 motherboardCompaq Presario CQ56 motherboard Vlask's chip: From NB HP Compaq 6531s. Donated by Radim Kopeček. Intel GL40 SLB95 step B3Intel GL40 SLB95 step B3