What's the difference between a pci-E and a pci-E X16 video card?

I just bought a new comp with 4 gigs ram and an intergrated geForce 6150 (i think 128mb) card... I wanna upgrade to a 512 card I know there is a pci-E slot and a pci-e 16 slot, is the 16 better?|||Yes, the x16 slot is better, and is intended for graphic card uses. PCI-E x16 has pretty much been industry standard for the last 3 years or so. x16 refers to the BANDWIDTH of the slot vs. the speed of the slot.



If you think of a freeway w/ a speedlimit of 60mph, PCI-E X16 would be like a freeway w/ 16 lanes vs a country highway w/ 1 lane per direction.|||x-16 a must

From the wiki

PCIe 2.0 doubles this data rate, introduced in late 2007, PCIe 2.0 is found on newer systems such as those based around the Intel X38 or AMD 780G chipsets.

The latest proposed PCIe 3.0 standard will increase the speed of the links further (tentatively scheduled for release around 2010).[1]



Each PCIe slot carries either one, two, four, eight, sixteen or thirty-two lanes of data between the motherboard and the addin card. Lane counts are written with an "x" prefix e.g. x1 for a single-lane card and x16 for a sixteen-lane card. Thirty-two lanes of 250 MB/s (PCIe 1.1) gives a maximum transfer rate of 8 GB/s (250 MB/s x 32, i.e., 8 billion bytes per second) in each direction. However the largest size in common use for PCIe 1.1 is x16, giving a transfer rate of 4 GB/s (250 MB/s x 16) in each direction. Putting this into perspective, a single lane for PCIe 1.1 has nearly twice the data rate of normal PCI, a four-lane slot has a transfer rate comparable to the fastest version of the old parallel PCI-X 1.0, and an eight-lane slot has a transfer rate comparable to the fastest version of AGP. However the data rates cited must be derated because 8b/10b coding is used in the physical layer. The link transfer speeds cited are to be considered maximum theoretical data rates.



full article @ http://en.wikipedia.org/wiki/PCI-Express|||does your mobo only support pcie/pcie x16 or does it also support pcie2.0/pcie2.0 x16? oh and x16 is better|||get an x32 it's way better