AGP 2x, 4x and the Pro-Slot
For a few months now there has been an extension for the AGP slot in the true sense of the word. The suffix "Pro" indicates the extension. Both our test motherboards OR840 from Intel and the Asus K7V already have this extension. "Pro" stands for an additional power supply for AGP graphic cards and has nothing to do with the bandwidth of the bus. This extension became necessary because the number of transistors on high-end graphics chips has increased rapidly in the last years and with it also the power requirements. In mainstream graphics cards the standard AGP slot has been sufficient for supplying power to the graphics card up to now. With the 3Dlabs Oxygen GVX210 we saw the first product using the additional voltage supply of the Pro extension.
On the far right, next to the wide gap, are the connections for the additional voltage supply on the 3DLabs GVX210.
Here you see the AGP connection of the smaller brother of GVX210. The GVX1 works without Pro extension.
Can you make out the difference on the Elsa Gloria II? Exactly, the Pro extension is missing here as well, but you see the additional gap in the middle. This enables the transfer mode AGP 4X. All other OpenGL cards in this test are only capable of AGP 2X.