AGP 8x bez problema radi na AGP 4x ploci i obrnuto (elektricno su kompatibilni), ali AGP 2x nije, tj AGP 2x (1.0) ploca i AGP 4x/8x kartica ne sme kao i AGP 4x/8x ploca i AGP 2x kartica. Ako imas 2x/4x plocu
obavezno stavi u BIOSu da koristis 4x karticu, voltaze nisu identicne!
http://www.ertyu.org/steven_nikkel/agpcompatibility.html
Citat:
AGP Signalling Voltages
Both the AGP slot on the motherboard and AGP video card must signal at the same voltage to function. Different speeds require different signalling voltages for operation. For example, AGP 8x signals at 0.8V, while AGP 1x can signal at 1.5V or 3.3V. Physical keys in the connector and slot dictate which signalling voltages the devices is capable of operating at.
Speed
Signalling Voltage
1x/2x 1.5V or 3.3V
4x 0.8V or 1.5V
8x 0.8V
Vidis, 8x AGP trazi 0.8V signal koji ploca mora da bude sposobna da da (AGP 2.0 ili 4x), nemoj da spalis nesto.