The extreme version tends to resemble the PCIe much more, and thus the performance should be comparable (extreme AGP vs PCIe 6800GS). When the AGP extreme version is "unlocked" it would tend to outperform it's PCIe counterpart by a decent margin. Furthermore, adding this into the equation (450Mhz core and 16 pipelines) you don't have a GT, you have an Ultra! So in reality, this guy got an ultra for $290, not bad if you ask me.
Ummm... NO!
First off, no matter what you do, the AGP GS will NEVER resemble the PCI-E GS... they use totally differant cores from one another, so lets just throw that right out the window to begin with... let's call a horse a horse and a cat a cat... the AGP GS uses the N40 core, which is the same as the GT and U core... the PCI-E uses a completely differant core with a differant architecture.
Secondly, I always love all this talk like; "when I unlock it (maybe, maybe not), and I overclock it (good luck getting what you hope for), I don't have a GT, I have an Ultra! Yipeee!!!!"
Let's talk reality check... for starters we're only guessing if it can be unlocked (without problems and/or texture issues), and we're certainly taking a HUGE leap-of-faith that you're going to overclock an otherwise 350MHz chip safely, easily and automatically 100MHz over it's default clock setting... it's painfully clear NVidia is shipping standard, everyday 350MHz N40s for their AGP GS lineup... anyone who overclocks this is going to totally be taking the chip out of specs and we'll have a "guess" as to which ones work or don't. Now, we've already seen at least one manufacturer advertise a 75MHz overclock and end-up shipping a standard 350MHz chip... yippee... how uber-fantastic.
The biggest laugh that is totally crazy is this whole "I'm going to buy a GS and get an Ultra instead" mentality that is totally in dream-land. I love how everyone seems to think that it is physically impossible to overclock higher-end cards, while it's so easy and automatic to overclock low-end cards. Why are you wasting your time talking about buying a GS? Why not buy a 6800XT unlock and overclock it and you'll have your Ultra... same thing.
Overclocking is not automatic... overclocking is not garaunteed, and overclocking can cause problems in quality. Most importantly, EVERY CARD HAS POTENTIAL TO OVERCLOCK... this includes GTs and Ultras! Okay, so you got lucky, and unlocked and overclocked your card 100MHz over specs. Now you're reaching Ultra levels... now the Ultra overclocks a mere 10MHz and is already faster again. Why is this point always ignored?
You seem to think $280 for a GS is a bargain... why not just buy a retail GT for the SAME price and you're already garaunteed to have your full 16-pipes, and you can start overclocking from there to get your "Ultra", instead of gambling with taking a GS out of specs?
hmm an ultra for $250? chew on that for awhile!
Hmmm... it's the EXACT SAME CORE as the other cards, rated for the exact same default 350Mhz speed. In fact, it's a 12-pipe GT that costs the same as the GT, with the same or less potential then the GT... why is NVidia releasing this card again?
It looks like GT with 4-pipes knocked-off/down or whatever. It has the same overclocking potential as any other card (GTs and Ultras included). Yet, sofar, it's carrying the same price as a GT (for AGP anyways). $280 bucks for an AGP GS? I can buy an AGP GT for the same price! What's the excitement about?
NVidia and other companies really need to release more/better cards for the AGP market... I hope the price comes down on these things stateside... but so far, we've only seen overpriced, 12-pipe, 350MHz cards... that's the reality. Chew on that for awhile.
P.S.
Honestly, I hope the AGP GS is released with a lower price and a higher "garaunteed" clock speed, but so far that just hasn't been the case. I'm just shocked that people seem to be expecting the moon with this card when it has been so blatantly clear this is an AGP GT with 4-pipes locked... nothing more. This is NOT a new card, a new chipset or a new miracle-card... it's the SAME OLD CHIPSET simply with 4-pipes taken down. There's nothing new about this card at all.
The price needs to come down on this... that's the bottom line.