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AMD Radeon HD 7790 details leak

AMD Radeon HD 7790 details leak

AMD's Radeon HD 7790 is expected to launch next month as the first desktop board to feature the Graphics Core Next 2.0 architecture.

The first details of AMD's Bonnaire XT-based Radeon HD 7790 reference design have leaked ahead of a claimed unveiling next month, although there are still disagreements as to how many corners have been cut to keep the price down.

According to unnamed sources quoted by Tom's Hardware, the Radeon HD 7790 is to be based on the 28nm Bonnaire XT Graphics Core Next (GNC) 2.0 chip, making it a revision newer than most of the boards that make up AMD's 7000-series graphics card family. Designed to sit between the Radeon HD 7770 and the Radeon HD 7850, the Radeon HD 7790 is claimed to include 768 stream processors running at 1,075MHz and pack 2GB of GDDR5 memory on a 128-bit bus.

A similar tale is told by Heise.de, which claimed earlier this month that the board would include 896 stream processors, something Tom's Hardware's source denies. Either way, both sources claim the same rough performance from the Radeon HD 7790 of around 10 per cent slower than the Radeon HD 7850 in most common benchmark apps and games.

Another thing on which both sources appear to agree is the pricing: the Radeon HD 7790 is expected to hit the European market for around £110-£120, which is a surprise given that the faster Radeon HD 7850 2GB can be had for as little as £140 delivered if you shop around. While the Radeon HD 7790 will include the latest revision of the Graphics Core Next architecture, previously limited to the laptop-only Radeon HD 8000M series, the lower performance alone may make it a tough sell unless retailers choose to ignore AMD's pricing guidance and run some tempting launch-day offers.

Regardless, AMD is reportedly ploughing ahead with plans to launch the Radeon HD 7790 world-wide in early April. However, confirmation of the actual specifications of the board - in particular, whether it comes with 768 or 896 stream processors enabled - will have to wait, with AMD refusing to comment on what it calls 'industry rumour or speculation.'

8 Comments

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V3ctor 12th March 2013, 12:36 Quote
Meh... too many gpu's in that price tag... Where are the new generations??
rollo 12th March 2013, 13:05 Quote
Is not any new ones due to be released for 2013
debs3759 12th March 2013, 14:29 Quote
Quote:
Originally Posted by V3ctor
Meh... too many gpu's in that price tag... Where are the new generations??

If it's the first desktop card built using GCN 2.0 technology, surely that makes it a next generation card?
alwayssts 12th March 2013, 14:50 Quote
Quote:
Originally Posted by debs3759
If it's the first desktop card built using GCN 2.0 technology, surely that makes it a next generation card?

Even if the 2.0 is a marketing gimmick, I was going to say that as well. It likely is the new gen. By any realistic measure, this *should* be priced between 7770 and 650ti as well. That's a decent size gap...between ~100-150 USD.

Not only is this likely a new generation part, it also is the one worth noting. I say that because a 896sp part, if it exists, will simply be a 7850 2GB replacement (or very very close to it). If you question that, simply do the math.

You could compare known stock frequencies/bw versus what is likely for such a part (1075-1100mhz and 128-bit/~7gbps or 192-bit/~5gbps) and come to a similar conclusion, but look at catalysts' overclocking maximums. They are a clear hint of where amd wants products to be segmented.

7850 is a max of 1050mhz. (1024/896)*1050 = 1200mhz. IOW, an 896sp part will be tuned to hit around 1200mhz overclocked...like any other 28nm part not limited by low voltage and/or artificial tdp restraints (like 7850 2GB).

;)
DBA 12th March 2013, 16:05 Quote
They should have made the PCB smaller to fit mITX boards. That would have made it perfect for such applications and have appealed to a much broader market.
Farting Bob 12th March 2013, 16:51 Quote
Quote:
Originally Posted by DBA
They should have made the PCB smaller to fit mITX boards. That would have made it perfect for such applications and have appealed to a much broader market.

Agreed, NV has made an effort to slim down the size of their reference boards, this still looks pretty long. I dont mind my 7850's size right now, but if i were to put it in a mITX case (which ive considered) id still rather having something an inch or 2 shorter.
Gareth Halfacree 12th March 2013, 20:21 Quote
Quote:
Originally Posted by Farting Bob
Agreed, NV has made an effort to slim down the size of their reference boards, this still looks pretty long.
Just to clarify: that's a picture of a 7770 for reference; nobody's got a picture of the 7790 yet. (Chances of a shorter PCB, however, are slim to none.)
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