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 |
| 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.
Read more about this topic: Accelerated Graphics Port
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“The assumption must be that those who can see value only in tradition, or versions of it, deny man’s ability to adapt to changing circumstances.”
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