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AGP - Advanced graphics port
www.intel.com/technology/agp/
www.agpforum.org
AGPx1, 124 pin (voltage coded), 66MHz, 266MByte/s, 1x32bit word per clock cycle, 3.3V
AGPx2, 124 pin (voltage coded), 66MHz, 533MByte/s, 2x32bit word per clock cycle, 3.3V
AGPx4, 124 pin (voltage coded), 66MHz, 1066MByte/s, 4x32bit word per clock cycle, 1.5V
AGPx8
AGPx1/2/4 Universal
AGP Pro, 172 pin, 3.3V
AGP Pro, 172 pin, 1.5V
AGP Pro Universal
AGP Pro 50 v5.0 (50Watt max)
AGP Pro 110 (110W max)
AGPx8 (AGP 2.2, 'Beyond AGP')
AGPx8 (AGP 3.0, multiple AGP ports, reduced voltage 0.8V)
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AGP 1.x spec (31.7.1996) |
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AGP 1.0 (31.7.1996) |
AGP 2.0 +
ECR23 (17.2.1997) |
AGP 3.0 |
| signal |
name |
voltage |
current |
voltage |
current |
voltage |
current |
| Vddq |
I/O supply |
3.0-3.6V |
max 5.0A |
3.15-3.45V |
max 8.0A |
1.425-1.575V |
max 2.0A |
| Vcc3.3 |
3.3V power |
3.0-3.6V |
max 7.6A |
3.15-3.45V |
max 6.0A |
3.15-3.45V |
max 6.0A |
| Vcc3.3 AUX |
3.3V power |
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3.15-3.45V |
max 0.375A |
| Vcc5 |
5.0V power |
4.75-5.25V |
max 5.0A |
4.75-5.25V |
max 2.0A |
4.75-5.25V |
max 2.0A |
| Vcc12 |
12.0V power |
11.6-12.6V |
max 0.5A |
11.4-12.6V |
max 1.0A |
11.4-12.6V |
max 1.0A |
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AGP 2.x spec (4.3.1998) |
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AGP 3.x spec (v1.0 [10. Sep 2002]) |
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AGP Pro 1.0 spec |
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AGP Pro 1.1 spec |
designed for fast transfers between system RAM and graphic card
obsolete if RAM on graphic card is big enough to hold all textures
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AGP 1.0 |
AGP 2.0 |
AGP 3.0 |
| Signaling |
3.3V |
1.5V |
0.8V |
| Protocol |
Pipelined transactions
+ Source synchronous clocking |
AGP1.0
+ Fast Writes |
AGP2.0
+ Some enhancements
– some deletions |
| Speeds |
x2, x1 |
x4, x2, x1 |
x8, x4 |
| Connector |
3.3V keyed |
1.5V keyed / UNI |
1.5V keyed |
AGP slots
| Mobo Edge |
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PCI |
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| AGP Pro |
3.3V -> |
AGP |
<- 1.5V |
Retention |
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AGP all |
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AGP 2.0 Pro |
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AGP uni Pro |
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AGP 1.0 |
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AGP uni |
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3.3V |
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1.5V Pro |
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1.5V + 3.3V |
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