AGP

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I have an easy question : what is the differance between
Version1 and version2 of AGP ? Volt,amp ?? i realy need to know

 

[Guest]

It's a little more complex than that. The two AGP's refer to a specification, which details what the AGP port should be capable of and how it works. The first specification only allowed the AGP bus to operate using a 3.3v strobe signal, whereas AGP 2.0 allows 1.5v signalling (used in AGP 4x speed). The amount of current drawn through the bus is determined by the device residing in it, and not the specification.

There are other fundamental differences:

<b>AGP 1.0</b>
This allows the bus to operate at 66.667Mhz or by using DDR, it can use the leading edges of strobe signal; effectively raising the bus speed to 133.333Mhz.

<b>AGP 2.0</b>
Allows for same basic bus speeds as above, but can also utilise an additional strobe line to transfer data - running two at once gives an effective speed of 266.667Mhz. It can also utilise Fast Writes, a technology which allows the AGP device to receive data from the CPU without it going through the system RAM first.

Both specifications allow the use of the sideband addressing port.