AGP vs GPU power

[landrover]

It finally happened. After years of faithful service I will be somewhat retiring the trusty old P3B-F (when I joined this forum it was the best mainboard around) and the Marvel.
In comes an ASUS P4P800 E deLuxe with either a new P750 or a used Parhelia 128.
In adverts and auctions I see that the early Parhelias only support AGP4x, while the P750 supports AGP8x.

Will the AGP bandwith on the P750 outperform the Parhelia GPU or is it the other way around?

[SitFlyer]

The Parhelia will be faster than the P750

[Topha]

There is also a new revision of Parhelia, supporting AGP8x I think

[K6-III]

Yep, the new Parhelia 8X is also running at a faster clockspeed.

275/275, rather than 220/275.

[landrover]

How do I check that? PowerDesk doesn´t mention it and neither does the bios. I have a used Parhelia 128 and according to the seller it´s about 5 months old, so I guess it´ll be an AGP8x example....