Your right the 5770 is a tiny bit ahead of the 7750.
Its about ~4% faster than a 7750, and about ~22% slower than a 7770.
*snip*
You can get a 7770 for ~109$.
Which is about 22% faster, so the peformance/price even at 100$ price point did move up.
The 7750 is just not as good value as the 7770. The price between the two cards is very small, but the performance is 26%+ (for like ~10$ more).
On the other side look what nvidia gives you for 100$:
*snip*
^ Geforce 640 ~ 100$
in a game that favors nvidia, the 640 is getting a royal arse kicking by the 7750,
not even to mention the 7770. Its like this in pretty much everything else.
So nvidia gives much much worse value at 100$. I guess thats just as depressing right?
The cheapest 7770 is $119 on Newegg, $109 with MIR. So yeah, it is a bit better than the 5770, but the price/performance ratio really hasn't improved. Maybe just a little bit. The 7750 really should drop in price. It's just not a $100 card; it's essentially this generation's successor to the 6670 or 5670, AMD's past contenders at the ~$80 price point. But AMD has no real reason to drop the 7750's price, since...
Nvidia's competition, the GT 640, is just embarassing. Really? A $100 video card with DDR3 memory in 2012? That's not just keeping the bar where it was before, that's
lowering the bar. The 640 gets its butt kicked up and down not only by the 7750, but previous generation cards like the Geforce 450, Radeon 5770, 5750, and often even the GDDR5 6670. I was hoping that Nvidia might drop the 640's price to make room for the 650, but there's no sign of that. Instead, Nvidia seems content to sell the 650 at the same price point as the 7770, even though the 7770 clearly has superior performance in reviews.
Indeed, the ~$100 market for this generation is depressing.