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In an industry that has long grown accustomed to annual product updates, the video card industry is one where the flip of a calendar to a new year brings a lot of excitement, anticipation, speculation, and maybe even a bit of dread for consumers and manufacturers alike. It’s no secret then that with AMD launching most of their Radeon HD 7000 series parts in Q1 of 2012 that the company would be looking to refresh their product lineup this year. Indeed, they removed doubt before 2012 even came to a close when they laid out their 8000M plans for the first half of 2013, revealing their first 2013 GPU and giving us a mobile roadmap with clear spots for further GPUs. So we have known for months that new GPUs would be on their way; the questions being what would they be and when would they arrive?

The answer to that, as it turns out, is a lot more complex than anyone was expecting. It’s been something of an epic journey getting to AMD’s 2013 GPU launches, and not all for good reasons. A PR attempt to explain that the existing Radeon HD 7000 series parts would not be going away backfired in a big way, with AMD’s calling their existing product stack “stable through 2013” being incorrectly interpreted as their intention to not release any new products in 2013. This in turn lead to AMD going one step further to rectify the problem by publically laying out their 2013 plans in greater (but not complete) detail, which thankfully cleared a lot of confusion. Though not all confusion and doubt has been erased – after all, AMD has to save something for the GPU introductions – we learned that AMD would be launching new retail desktop 7000 series cards in the first half of this year, and that brings us to today.

Launching today is AMD’s second new GPU for 2013 and the first GPU to make it to the retail desktop market: Bonaire. Bonaire in turn will be powering AMD’s first new retail desktop card for 2013, the Radeon HD 7790. With the 7790 AMD intends to fill the sometimes wide chasm in price and performance between their existing 7770 (Cape Verde) and 7850 (Pitcairn) products, and as a result today we’ll see just how Bonaire and the 7790 fit into the big picture for AMD’s 2013 plans.

AMD GPU Specification Comparison
  AMD Radeon HD 7790 AMD Radeon HD 7850 AMD Radeon HD 7770 AMD Radeon HD 6870
Stream Processors 896 1024 640 1120
Texture Units 56 64 40 56
ROPs 16 32 16 32
Core Clock 1000MHz 860MHz 1000MHz 900MHz
Memory Clock 6GHz GDDR5 4.8GHz GDDR5 4.5GHz GDDR5 4.2GHz GDDR5
Memory Bus Width 128-bit 256-bit 128-bit 256-bit
VRAM 1GB 2GB 1GB 1GB
FP64 1/16 1/16 1/16 N/A
Transistor Count 2.08B 2.8B 1.5B 1.7B
Target Board Power ~85W 150W (TDP) ~80W 151W (TDP)
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm TSMC 40nm
Architecture GCN 1.1* GCN 1.0 GCN 1.0 VLIW5
Launch Date 03/22/2013 03/05/2012 02/15/2012 10/21/2010
Launch Price $149 $249 $159 $239

Diving right into things like always, Bonaire is designed to be an in-between GPU; something to go between the 10 Compute Unit Cape Verde GPU, and the 20 CU Pitcairn GPU. Pitcairn, as we might recall, is almost entirely twice the GPU that Cape Verde is. It has twice as many shaders, twice as many ROPs, twice as many geometry processors, and twice as wide a memory bus. Not surprisingly then, the performance gap between the two GPUs at similar clockspeeds approaches that two-fold difference, and even with binning and releasing products like the 7850 this leaves a fairly large gap in performance.

As AMD intends to carry the existing Southern Islands family forward into 2013, their strategy for the mid-to-low end of the desktop market has become one of filling in that gap. This is a move made particularly important for AMD due to the fact that NVIDIA’s GK106-powered GeForce GTX 650 Ti sits rather comfortably between AMD’s 7770 and 7850 in price and performance, robbing AMD of that market segment. Bonaire in turn will fill that gap, and the 7790 will be the flagship desktop Bonaire video card.

So what are we looking at for Bonaire and the 7790? As the 7790 will be a fully enabled Bonaire part, what we’ll be seeing with the 7790 today will be everything that Bonaire can offer. On the specification front we’re looking at 14 CUs, which breaks down to 896 stream processors paired with 56 texture units, giving Bonaire 40% more shading and texturing performance than Cape Verde. As a further change to the frontend, the number of geometry engines and command processors (ACEs) has been doubled compared to Cape Verde from 1 to 2 each, giving Bonaire the ability to process up to 2 primitives per clock instead of 1, bringing it up to parity with Pitcairn and Tahiti. Finally, the backend remains unchanged; like Cape Verde, Bonaire has 16 ROPs attached to a 128bit memory bus, giving it equal memory bandwidth and equal ROP throughput at equivalent clockspeeds.

Moving on to the 7790 in particular, the 7790 will be shipping at a familiar 1GHz, the same core clockspeed as the 7770. So all of those performance improvements due to increases in functional units translate straight through – compared to the 7770, the 7790 has 40% more theoretical compute/shading performance, 40% more texturing performance, 100% more geometry throughput, and no change in ROP throughput. Meanwhile in a move mirroring what AMD did with the 7970 GHz Edition last year, AMD has bumped up their memory clocks. 7790 will ship with a 6GHz memory clock thanks to a higher performing (i.e. not from Cape Verde) memory interface, which compared to the 7770’s very conservative 4.5GHz memory clock means that the 7790 will have 33% more memory bandwidth compared to 7770, despite the fact that the memory bus itself is no wider.

Putting it altogether, so as long as the 7790 is not ROP bottlenecked, it stands to be 33%-100% faster than the 7770. Or relative to 7850, the 7790 offers virtually all of the 7850’s texturing and shading performance (it’s actually 2% faster), while offering only around 60% of the memory bandwidth and ROP throughput.

On the power front, unsurprisingly power consumption has gone up a bit. As a reminder, AMD does not quote TDPs, but rather “typical board power”, which is AMD’s estimate for what power consumption will be like under an average workload. 7770’s official TBP is 80W, while 7790’s is 85W. We’ll have our own breakdown on this in our look at power, temperature, and noise, but it’s fair to say that 7790 draws only a small amount of additional power over the 7770. Ultimately this can be attributed to the fact that while Bonaire is a larger chip, it’s not extremely so, with only the addition of the CUs and additional geometry/ACE pipeline separating the two. Mixed with gradual improvements over the last year on TSMC’s 28nm process, and better power management from AMD, and it’s possible to make these kinds of small improvements while not pushing load power too much higher.

On the note of Bonaire versus Cape Verde, let’s also talk a bit about transistor count and die sizes. Unsurprisingly, Bonaire sits between Cape Verde and Pitcairn in transistor count and die size. Altogether Bonaire comes in at 2.08B transistors, occupying a 160mm2 die. This is as compared to Cape Verde’s 1.5B transistors and 123mm2 die size, or Pitcairn’s 2.8B transistors and 212mm2 die size. For AMD their closest chip in terms of die size in recent history would be Juniper, the workhorse of the Evergreen family and the Radeon HD 5770, which came in at 166mm2.

Moving on, as is consistent with AMD’s previous announcements, the 7790 is being launched as just that: the 7790. AMD has told us that they intend to keep the HD 7000 brand in retail this year due to the success of the brand, and to that end our first Bonaire card is a 7700 series card. The namespace collision is unfortunate – sticking with the 7000 series means AMD is facing the pigeonhole principle and has to put new GPUs in existing sub-series – but ultimately this is something AMD shouldn’t have any real problems executing on. We’ll get into the microarchitecture of Bonaire on our next page, but for gamers and other consumers Bonaire may as well be another member of the Southern Islands GPU family, so it fits in nicely in the 7000 series despite being from a new wave of GPUs.

With that in mind, let’s talk about product positioning and pricing. The 7790 will launch at $149, roughly in between the 7770 and the 7850. AMD will be positioning it as an entry-level 1080p graphics card, and though it’s a 7700 series part its closest competition in AMD’s product stack is more likely to be the 7850, which it’s closer to on the basis of both price and performance.

Against the competition, the 7790’s closest competition will be the GeForce GTX 650 Ti. However with the price of that card regularly falling to $130 and lower, the 7790 is effectively carving out a small niche for itself where it will be a bit ahead of the GTX 650 Ti in both performance and in price. NVIDIA’s next card up is the GTX 660, at more than $200.

For anyone looking to pick up a 7790 today, this is being launched ahead of actual product availability (likely to coincide with GDC 2013 next week). Cards will start showing up in the market on April 2nd, which is about a week and a half from now. Notably, AMD and their partners will be launching stock clocked and factory overclocked parts right away, and from what we’re being told factory overclocked cards will be prolific from day one. Overall we’re expecting this launch to be a lot like the launch of the GTX 560, where NVIDIA did something very similar. In which case we should see both stock and factory overclocked parts right away with more factory overclocked parts than stock parts, and if it does play out like the 560 then stock clocked cards would become a larger piece of the 7790 inventory later in the lifetime of the 7790.

Finally, AMD is wasting no time in extending their Never Settle Reloaded bundle to the 7790. As the 7790 is a cheaper card it won’t come with as many games as the more expensive Radeon cards, but for 7790 buyers they will be receiving a voucher for Bioshock Infinite with their cards. MSRPs/values are usually a poor way to look at the significance of game bundles, but it goes without saying that it’s not too often that $150 cards come with brand-new AAA games.

Spring 2013 GPU Pricing Comparison
AMD Price NVIDIA
  $219 GeForce GTX 660
Radeon HD 7850 $179  
Radeon HD 7790 $149  
  $134 GeForce GTX 650 Ti
Radeon HD 7770 $109 GeForce GTX 650
Radeon HD 7750 $99 GeForce GT 640

 

Bonaire’s Microarchitecture - What We’re Calling GCN 1.1
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  • silverblue - Friday, March 22, 2013 - link

    You must've missed the part about them simply not having as much time to test the 7790 as they'd have liked because they were at GTC. Other sites apologised for their lack of time as well.

    There's a whole load of other reviews out there; only a few have overclocking results (Guru3D notably), and as far as I can see only AT, of the major sites, has both the 7790 and a factory overclocked 7790 in the same test. Guru3D is alone in providing a CrossFire test and though two 7790s perform about the same as a sole 670, there's no power readings. There's a good number of different titles being benchmarked so it's not strictly a list of AMD-says-test-these-titles, plus Tomb Raider, a Gaming Evolved title, performs better on NVIDIA hardware. There's a few bugs with the beta drivers used for the 7790 in these reviews most notably with latencies (a bug that has already been fixed with the next Catalyst release so yes, we will see new drivers soon), however the latency values are so far ahead on average of what we used to see from AMD that this can hardly be classed as an issue. Testing has generally centred on 1920x1080 because that's really the limit where cards like this are supposed to be performing - there's little point in 1024x768 and an equal measure of futility trying for 5760x1080 or whatever; the former is ridiculously low res and the latter is ridiculously ambitious even for a 7970 or 670/680.

    Sapphire's blurb about multi-monitor usage via the TweakTown website:

    "Working or gaming with multiple monitors is becoming increasingly popular, and the SAPPHIRE HD 7700 series supports this with AMD Eyefinity, now in its second generation. The SAPPHIRE HD 7790 OC Edition has two DVI ports (DVI-I and DVI-D), HDMI and a single DisplayPort output, supporting up to four monitors.

    The SAPPHIRE HD 7790 OC Edition model supports the FleX feature, pioneered by SAPPHIRE, that allows three digital displays to be connected to the DVI and HDMI outputs and used in AMD Eyefinity mode without the need for an external active adapter. All four outputs can be used in AMD Eyefinity mode, but the fourth display must be a DisplayPort monitor or connected with an active adapter."

    I've heard AMD's launch date for this is today; Guru3D has the following to say:

    "But I need to add this little note alright; AMD's Never Settle Reloaded promotion continues. At participating retailers beginning 02 April, 2013, gamers will be able to receive a free copy of BioShock Infinite with a purchase of their new AMD Radeon HD 7790 graphics card. See, now that's great value. The Radeon HD 7790 series cards will be available in stores starting April 2, 2013"

    Trusting this is of some use to you...
    Reply
  • CeriseCogburn - Sunday, March 24, 2013 - link

    I've run 2 flex edition cards, you idiot.
    Have you ?
    Run any MDT nVidia galaxy cards dummy ?
    How about all dvi outs so you daon't have to have $100's of dollars of soon to die amd dangly cables ?
    Heck a friend just got ANOTHER 6870 he usually runs 4 monitors, but that could only run 2 OOB and he has loads of cables, so he had to buy another cable just to run a 3rd monitor - it took 2 weeks to arrive...
    ROFL
    AMD SUCKS with eyefinity / multiple monitors and nVidia DOES NOT - nVidia keeps the end user in mind and makes it INEXPENSIVE to set up 3 or 4 monitors !

    Amd makes it cost prohibitive.
    AMD SUCKS, they lost again, totally.
    Reply
  • geniusloci - Saturday, March 23, 2013 - link

    You are a pathetically simple little mind, aren't you? Reply
  • geniusloci - Saturday, March 23, 2013 - link

    What planet do you come from?
    This card will run 4 monitors, eyefinity has done this very well, forever. With discrete audio per monitor. Nvidia is really getting handed it's ass by AMD in this category.
    This card will spank it's nvidia competition in civ5, since civ uses opencl, and nvidia sucks at opencl (and their current cards even suck at cuda).
    Crossfire: there's a crossfire port at the top, genius. It will obviously crossfire.
    Too bad Nvidia's 2D quality and video quality is such utter shit. I might have actually used that gtx660 I bought instead of sending it back for a 7870.
    Reply
  • CeriseCogburn - Sunday, March 24, 2013 - link

    You have your display port monitor or $100 active display cable dummy ? LOL
    4 monitors MY BUTT.
    Another clueless amd fanboy.
    Reply
  • eric.zaba@gmail.com - Sunday, March 24, 2013 - link

    You obviously dont have a clear understanding of gpu tech so just stop blabbing your stupidity, even most nvidia biased people can admit Check linus tech tips , check your games they all work much better on amd with multimonitor.

    and no overclock talk maybe because AMD doesnt approve of people tampering with gpus............ and because they want it to seem so good that you dont need an overclock...... and the specific hardware partners can make different port configs so why would you say that?
    and maybe comparing ASUS 650tis to this GPU is invalid becuase you didnt specify who made it so the port config advantage is completely irrelevant.

    Amd is not bankrupt because of their GPU business. and their CPU business isnt bad i dont think that getting into the gpu and cpu of the top 3 consoles (PS4 Xbox WiiU) is so bad either. and why would game biases not be true if amds drivers and games play better on the amd based systems
    eg: Crysis 3. and saying that the civ 5 benches crashed is completely stupid because a good website like anandtech doesnt normally disregard such things. and AMD didnt pay them off if they are bankrupt right? yes it can crossfire because theres crossfire connectors on the top so maybe they assumed things would be implied for the general crowd.
    Reply
  • althaz - Friday, March 22, 2013 - link

    I think it's also worth mentioning that the 7850 is a quite excellent overclocker. At stock I think it's definitely not worth the extra $30, but once overclocking is taken into account, if you can afford the $30 you are crazy not to spend it (assuming you are comfortable with overclocking of course). Reply
  • Bob Todd - Friday, March 22, 2013 - link

    Yeah, I'm curious what the pricing will look like on these a few weeks after introduction. I picked up a 7850 (2GB MSI Twin Frozr) for $170 AR a few weeks ago to put in a HTPC, and I've seen it at that price again already. It will be interesting to see if the regular sales on 7850s decrease once the 7790 is out. Kudos to AMD for offering BioShock Infinite with this. Reply
  • Aikouka - Friday, March 22, 2013 - link

    Given we're talking about gaming cards here, I think it's worthwhile to add that only the 7800s and 7900s come with AMD's Never Settle game promotion. So, if you're interested Tomb Raider and/or Bioshock Infinite, the 7850 may have significantly more value to you. If you're not interested in them, people have been selling the coupons on eBay for about $50-60 each. Reply
  • Bob Todd - Friday, March 22, 2013 - link

    There's a small paragraph in the article explaining that this card _is_ part of the Never Settle Reloaded program. It's only getting BioShock Infinite since it sits at a lower price point, but still a nice addition. The bundles are a big part of the reason I'm curious to see how the pricing shakes out. I sold a TR/BS bundle and kept about ~$50 in my pocket after fees, so I basically got a very nice 2GB 7850 for $120. You could obviously sell the BioShock code you'd get with a 7790, but if the prices for that card stay at MSRP for too long they'll have some stiff competition from 7850s on sale. Unless of course the 7850 sales dry up since it doesn't have to cover such a large swath of AMD's lineup now price wise. Reply

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