geekapproved :
And that changes my point how? Actully 28 to 40nm is less difference than 55 to 40nm. Diff of 15nm vs diff of 12nm. Check your math buddy.
Regarless of what the nm is, there will be 7XXX series cards that are slower than some 6XXX series cards. That's fact.
I thought you might say that, my math is okay.
40/28 is 1.43 and 55/40 is 1.375
The percentage is what's important. Also I'm expecting to see additional room for overclocking as 28nm is supposed to be running much cooler.
Sure there will be $100 28nm cards that will run a bit slower than $200 40nm cards. There's a difference in price vs performance.
As a technical correction, the 28/40/55nm refers to the diameter of the chip.
It must be squared to get the area of the chip.
When you do the math, you will find that 40nm is about twice the size of 28nm, and that 55nm is twice the size of 40nm.
A big difference.
As to the OP's question, I suggest getting whatever will do the job right now. Preferably the strongest card he is willing to pay for.
The market is very competitive, and you get fair value at whatever price point.
When the new cards come out, they must compete with the old cards on a price performance basis.
The advantage to amd and nvidia will be the smaller chip which should be smaller, cheaper to produce, be more power efficient, and possibly stronger by making use of more chip acerage.
As a possible hedge, look an EVGA cards, they have a 90 day trade up program.
But, in my experience, the new cards come out past the 90 days
.