Versions
Intel released "AGP specification 1.0" in 1997. It included both the 1× and 2× speeds. Specification 2.0 documented AGP 4× and 3.0 documented 8×. Available versions include:
| Specification | Speed | Pumping | Rate (MB/s) | Frequency (MHz) | Voltage (V) |
|---|---|---|---|---|---|
| PCI | - | single | 133 | 33 | 3.3/5 |
| AGP 1.0 | 1× | single | 266 | 66 | 3.3 |
| AGP 1.0 | 2× | double | 533 | 66 | 3.3 |
| AGP 2.0 | 4× | quad | 1066 | 66 | 1.5 |
| AGP 3.0 | 8× | octuple | 2133 | 66 | 0.8 |
| AGP 3.5 * | 8× | octuple | 2133 | 66 | 0.8 |
* AGP version 3.5 is only publicly mentioned by Microsoft under Universal Accelerated Graphics Port (UAGP), which specifies mandatory supports of extra registers once marked optional under AGP 3.0. Upgraded registers include PCISTS, CAPPTR, NCAPID, AGPSTAT, AGPCMD, NISTAT, NICMD. New required registers include APBASELO, APBASEHI, AGPCTRL, APSIZE, NEPG, GARTLO, GARTHI.
There are various physical interfaces (connectors); see Compatibility section.
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