AMD doesn't have a ton of resources to toss around, they're not the 800 pound gorilla in the room. They need to play it smart, and a 28nm refresh a few months out from 20nm ramp up isn't a smart move imo.
1. 20nm node is not a few months away. Why this myth keeps being perpetuated on our forums? Where does it say anywhere on AMD/NV's roadmap that we'll get 20nm GPUs before June-July 2014? Please link. If volume production at TSMC is only scheduled for Q1 2014, by the time the inventory is built, we are in Q2 2014.
2. Holiday 2013 sales are a big deal. I don't know how you guys operate but I play the least amount of games from May to September. Most of my gaming happens in the cold months of the year. Guess what from October to April it is cold weather season in US/Canada and most of Europe/Russia, parts of China. These are major gaming markets.
3. BF4 is going to be one of the biggest games this holiday season for PC gaming. Launching your new cards around that game, especially if they outperform the competitor at nearly every price level could be a major boost for your sales.
4. Right now a barely faster 770 sells for $390-450, while AMD's barely slower 7970 1Ghz/GE is going for $290-350. This is a good time to increase ASP by launching 9950 for $399 and taking the 770 out. Suddenly AMD raises ASP by $50-100 and it barely costs them more to make this chip. Even though 7970GE is nearly as good as the 770, because the 770 has a "newer" card allure, it will outsell the 7970GE every time. AMD can't let that happen. Same with 7950 V2 vs. 760.
5. 450mm2 20nm chip will cost a lot more than a 450mm2 28nm chip. Until 20nm matures and wafer demand subsides, AMD can coast for another 8-9 months with refreshed 28nm parts. These parts are not necessarily intended for 7970/GE users either. There are plenty of PC gamers rocking GTX470/560/560Ti/570 and 5850/5870/6870/6950/6970 who have not upgraded yet. The 780 impressed them but maybe over the summer they spent $ on house renovation, landscaping, travel, golf/sports equipment, etc. Once October-November rolls around, they might start looking at their GPU upgrade to play games over the long winter.
Nvidia released GT200 on 65nm when 55nm was 100% ready to go, so it's not unprecedented for a company to wring out as many products as possible on a proven node process before moving on.
Furthermore, after 7970 came out, RR made several statements that going down to lower nodes as quickly as possible is no longer economical. His new direction for AMD is to stay on the same node for as long as possible until the next node is financially viable. This is a change of strategy for AMD. 9970 launching on 20nm goes counter against everything the CEO has been saying for the last 1.5 years. If you look at AMD as a whole, they have slowed down transitions to lower nodes on their CPU/APU side as well. Additionally, if 20nm was physically
and financially viable for 1st week of October, NV would not be dumb enough to launch GTX780 this summer on 28nm when 1 quarter away you have 20nm.
TSMC's own roadmap discusses risk production for 20nm SoC chips, not high performance computing. People need to be able to separate various types of 20nm transistors intended for different markets too.
Evergreen -> 40nm
Northern Islands -> 40/32nm
Southern Islands -> 28nm
Sea Islands -> 28/22nm
Volcanic Islands -> 20nm
Pirate Islands -> 20/14nm
The bolded parts never happened which makes your entire road-map after Sea Islands mobile parts a pure guess.
I think AMD can get 780 performance (or ever so slightly better) out of a 385-400mm^2 GPU and sell it for $550 and make just as much money per card as Nvidia does off the gtx780.
That's not realistic, unless they drop DP. 7970 is a 365mm2 chip. You can't only add 35mm2 and suddenly match 780s unless your chip runs at 1400mhz. I think 430-440mm2 is what they'd need bare minimum. You are also giving AMD a lot more credit than they deserve. You think NV needs to make a chip 40% larger to match AMD's 400mm2 in performance? Do you think NV put placebo transistors inside their GK110?
I don't think this will be as much of a change from Tahiti as Cayman was from Cypress. At 40nm AMD released 2 different GPU families with significant architecture overhauls.
You must be talking about a different GPU series that never got released. Cayman and Cypress are exact same GPU architecture. There is almost no efficiency gained going with Cayman. It's peanuts. All they did was remove a redundant unit to move it from VLIW-5 to VLIW-4. The major difference was doubling of VRAM and upgraded geometry engine. If you look at 6970 vs. 5870 in non-tessellated & < 1GB of VRAM games, the performance is usually very close.
6970 vs. 5870 - last 3 games tested at GameGPU
+2 fps in Castlevania
+3 fps in Divinity Dragon Commander
- 1 fps in Payday 2
If AMD doubles ACEs, increases geometry engines to 3-4 and goes from 32 to 40-48 ROPs, that would be a monumental change compared to what they did from 5870 to 6970.
Keep in mind the more transistors Nvidia and AMD pack into their GPU's, the more difficult these GPU's are to make which may also be another reason why so many people feel like these GPU's are coming out "late."
So far not a single person on our forum has stepped up and mathematically disproved my comment that the move from any GTX580 OC to Galaxy HOF 780 OC is the greatest move NV did in 1 generation since 7900GTX to 8800GTX. It seems because Haswell flopped large, everyone is bored nowadays and they have $ to burn in their pockets. They want 20nm asap because the money that they saved up to spend on Haswell is now just money wasted for 95% of PC gamers rocking i5 2500-2600-2700-3570-3770, etc. I blame Intel for the disgruntled PC gamer. This generation's GPU increases are very good, especially with 780 OC. I bet it just doesn't sit well with many PC gamers with $600-700 sitting around for a GPU upgrade to drop it on a nearly 2 year old 28nm GPU tech.