I don't know where you .Eric,got your numbers from...but be aware of those N-vidia paid out sites...like: 
bjorn3d,hexus,tweaktwon,................
The 4830 does beat the 9800gt in every single game and it even surpasses the 9800gtx in few games.

A proud owner of a complete DAAMIT PC.

Nice addition to the ATI crowd :) After having a 7800 GTX die (same way as the 8xxx series btw, maybe The INQ should check to see if this series is also affected??? hmmm???) I'm back on the ATI wagon.

Now all I want is for someone to release a 4670 or 4650 low profile so I can whack two of them into a tiny case on a DFI LP JR 790GX-M2RS and have a nice little LAN Party machine! Come on! Give me low profile cards!!!

Check out the conclusion here. http://www.anandtech.com/video/showdoc.aspx?i=3437&p=11

Looks to me like the performances of the cards match the price curve. No bashing going on. $/fps wise they're probably equal. fps/watt not so much, but it's not enough to bother.

One could use a hd4750, to fill the gap between hd4670 and hd4830.

Let it be 80w-90w tdp

Our little toddler's named Charlie, and he's not the only little Charlie that needs to grow up.

No Charlie go look at some reviews, it doesnt pummell the 9800GT, it's noticably faster in some games and noticably slower some other games on most reviews. It's more expensive than a 9800GT by roughly 20% & draws between 20-30% more power depending on load so in the performance per watt stakes (something I'm sure you've banged on about recently) its a poor show. It's still a good card but not many reviews say its a clear winner over a 9800GT in fact most say it's a toss up between them and to go with the name you prefer. Also it's a pitty that you feel you absolutely MUST without fail introduce some venom towards nVidia in every article you write these days.

I'll was looking at the 4670, but the 4830 gets around 10 frames per second higher FPS. What it comes down to for me is the money. Will decide in a few days.

That's a very disappointing number. But I guess after you pass the 75W mark for PCIe, lower wattage isn't as big a selling point.

If we assume all of these changes are weighted evenly, we should see the 4830 with about 85.5% of the performance of the 4850 - mathematically speaking...

A simplification maybe, but it should be around that area... Which will be nice.