AMD: Southern Islands (7*** series) Speculation/ Rumour Thread

Well, 7990 was reserve for dual GPU solution or we would think that.... Since we had 6990 Dual Cayman.

 

But then again we had 5970 as a dual chip card but 6970 was a single-chip card.

I wouldn't be too surprised (but I'm not expecting it either) if they released a 7990 single-chip at well over 1 GHz and called the dual chip 7995.

 

mobile 6990 was a single chip card as well, i'd not be surprised if it happens but i want it as 7970 ''XTX'' not 7990 or 7980

 

OTOH, I still think it'd be perfectly fine if AMD just relaunched all the HD7000 series as HD8000 with 50% higher clocks across the board, given they could manage to keep the power consumption in check (through voltage regulation and better 28nm maturity).

Heck, nVidia just got away with G92 spread across some 5 generations...

 

I think you guys are being wildly optimistic regarding the clock speeds AMD may be able to achieve on this supposed "7980". I do not expect them to reach anywhere close to 50%, not while managing to keep power consumption at a reasonable level at least. And not to mention they'd have to be able to mass produce it so if they wanted serious quantities they'd have to bin accordingly.

Take the 4890 v/s 4870 for example; even with a new spin, chip timing adjustments, cap ring, and almost another year of process maturity, they were able to move from 750 to 850 mhz. So for a hypothetical "7980", my guess is that at most they'd be able to reach somewhere around the current overdrive limits of Tahiti, i.e. 1.1 Ghz core/1.5 ghz memory.

Oh and im just gonna quote a post of mine from a while back - http://forum.beyond3d.com/showpost.php?p=1569248&postcount=555

I guess i was right about the three chip lineup, and i think the die sizes should be about right too

 

So far for what I've seen, people have both OC'd to CCC limits and at the same time undervolted the cards without problems, so getting quite high clocks while staying under 300W, or even 250W, shouldn't be that hard to do

 

I guess they are binning chips for dual Tahiti already and we wont see any XTX with present stepping.. according to Charlie's calculations small stepping should take ~3 months and big one ~6 months.. since Tahiti is working perfectly, 6 months doesnt make any sense.. considering AMD finishes all 7000 lineup in March, They may release XTX in Summer..

 

Yes but as soon as volts jump, power consumption soars. I don't expect anything beyond 1.2Ghz and even that would probably be an OEM OC. 25% is plenty to distinguish it from the 7970 anything beyond that is likely to encroach on refresh parts. And I wouldn't expect to see it at all until competition launches something faster because they will need to compress their price structure for it to make sense.

 

Did those people submit those cards to a full system qualification? Check all possible load scenarios? Run bit error tests? Check with chips from various corner lots? All at different temperatures, from 0C to, say, 35C?

There's a reason AMD and Nvidia set certain (low) clocks and then encourage overclocking. Leaving performance on the table so the competitor can take the top spot is not one of them.

Not saying there won't be an official higher clocked version, but let's not go overboard with specs based on some dude in his basement not seeing visual corruption.

 

So silicon validation by "dude in basement" isn't standard practice in the industry?

 

Can I "one up" you?
http://semiaccurate.com/forums/showpost.php?p=127762&postcount=46

 

Why else would Intel be paying me all this money?

 

7950: 1792 Stream processors, 800/5000MHz, 2x6Pin.. they're not sure that card has final bios or not..

http://translate.google.com/translate?langpair=auto|en&u=http%3A%2F%2Fvga.it168.com%2Fa2012%2F0118%2F1303%2F000001303886.shtml

http://translate.google.com/translate?langpair=auto|en&u=http%3A%2F%2Fvga.it168.com%2Fa2012%2F0118%2F1303%2F000001303886_1.shtml

3DMARK11 Graphics Scores
HD7970: 8295
HD7950: 6518
HD7950 @1030/5600MHz: 7970
HD6970: 5569
GTX570 @750MHz: 5560

 

That would be quite a substantial drop from 7970. Far bigger than 6970>6950.

 

If the leak is right of course

 

From 50 to 70:
HD 5k8: +30%
HD 6k9: +20%
HD 7k9: +32% (in need for DOUBLE CONFIRMATION!)
-----------------
Nothing out of the ordinary in my books

 

Are you implying that it will be 850mhz for the core?

 

If it overclocks to 1200mhz it be likely the price/performance deal of a long time.

 

Curious to see the price. 399$ or 449$ for the 3GB version?

 

It won't oc to 1200mhz unless you add volts at least to where the 7970 is, disable power tune and the power delivery doesn't blow up on you.

That being said, wasn't there supposed to be no reference 7950 designs but only custom ones?