Not to dogpile or anything, but I think what Old-Polack is saying we need is more data on which specific Intel video system you are using. A lot of the integrated Intel video systems use memory from the main RAM store (so-called "shared memory") which takes away from the main RAM for other purposes (like loading and running programs). This can incur a minor performance hit for those programs. It also certainly means lessened video performance over those systems that use their own (usually faster) video RAM.
It also wouldn't hurt to know a bit more about your motherboard, CPU, chipset, RAM load, version of PCLinuxOS you are using, etc.
More info is better than less. Help us help you, please.