Let me get this straight, comparing the 120$ 7770 to the 150$ ( 30$ delta ) 650ti is fair game but comparing the same 650ti to a 160$ 7850 1GB ( 10$ delta ) is just wrong?
That's been the story this generation since June when AMD's new drivers and price drops took NV out of the price/performance and performance equation for single-GPUs.
NV fans insist that we should be comparing GT650 to HD7750, GTX650Ti to HD7770, GTX660 to HD7850, GTX660Ti to HD7870, GTX670 to HD7950 and GTX680 to HD7970 (because they drop the HD7970 GE SKU as non-existent and move the entire AMD line-up 1 notch down in performance, ignoring the price levels).
The reality is based on current pricing, you start with HD7970 GE at $450 and move down with HD7970 going against 670, 7950 against 660Ti and so on. At the sub-$250 level we get:
HD7750 > GT640
HD7770 > GTX650
HD7850 1GB vs. GTX650Ti (still don' know actual 650Ti MSRP but so far the performance looks terrible for the 650Ti as a 7850 competitor)
HD7850 2GB > no competitor from NV
HD7870 > GTX660
Some HD7870s have already dipped to $195-200 recently while GTX660 continues to hover above $200.
http://www.computerbase.de/artikel/grafikkarten/2012/test-nvidia-geforce-gtx-650/4/
This. And do not forget that these cards are sold worldwide. There are big differences between different markets. For example where I'm living the 7850 2GB has the same price as the GTX660. What would you choose?
Country source? In most places in Europe (UK, Portugal, Spain, Poland), US, Canada and Oceania, NV cards have a substantial price premium on average.
HD7870 is a competitor to GTX660. You are saying HD7870 costs more than a GTX660 where you are at?
UK:
HD7850 1GB =
£135
HD7850 2GB =
£156
HD7870 =
£179
GTX660 =
£192
Germany:
HD7850 1GB =
€160
HD7850 2GB =
€180
HD7870 =
€210
GTX660 =
€210
Not only do NV cards cost more or similar but HD7870
is faster than a GTX660.
In Portugal, NV products are overpriced as 1Ghz HD7970 costs less than GTX670s, MSI Lightning 7970 costs as much as Asus DirectCUII 670.
In Canada, HD7970 goes for
$350 CDN and HD7850 1GB is
$155 CDN, so not much needs to be said about NV's price premiums where I live.
So which country are you from again?