During their 30 years of graphics celebration, today AMD announced a forthcoming addition to the Radeon R9 200 graphics card lineup. Launching on September 2nd will be the company’s new midrange enthusiast card, the Radeon R9 285.

The R9 285 will take up an interesting position in AMD’s lineup, being something of a refresh of a refresh that spans all the way back to Tahiti (Radeon 7970). Spec wise it ends up being extremely close on paper to the R9 280 (née 7950B) and it’s telling that the R9 280 is no longer being advertised by AMD as a current member of their R9 lineup. However with a newer GPU under the hood the R9 285 stands to eclipse the 280 in features, and with sufficient efficiency gains we hope to see it eclipse 280 in performance too.

AMD GPU Specification Comparison
  AMD Radeon R9 290 AMD Radeon R9 280X AMD Radeon R9 285 AMD Radeon R9 280
Stream Processors 2560 2048 1792 1792
Texture Units 160 128 112 112
ROPs 64 32 32 32
Core Clock 662MHz 850MHz ? 827MHz
Boost Clock 947MHz 1000MHz 918MHz 933MHz
Memory Clock 5GHz GDDR5 6GHz GDDR5 5.5GHz GDDR5 5GHz GDDR5
Memory Bus Width 512-bit 384-bit 256-bit 384-bit
VRAM 4GB 3GB 2GB 3GB
FP64 1/8 1/4 ? 1/4
TrueAudio Y N Y N
Typical Board Power 250W 250W 190W 250W
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm? TSMC 28nm
Architecture GCN 1.1 GCN 1.0 GCN 1.1? GCN 1.0
GPU Hawaii Tahiti Tonga? Tahiti
Launch Date 11/05/13 10/11/13 09/02/14 03/04/14
Launch Price $399 $299 $249 $279

Looking at the raw specifications, the R9 285 is a 1792 stream processor Graphics Core Next product. Paired with these SPs are 112 texture units (in the standard 16:1 ratio), and on the backend of the rendering pipeline is 32 ROPs. As is unfortunately consistent for AMD, they are not disclosing the product’s base clockspeed, but they have published the boost clockspeed of 918MHz.

Meanwhile feeding R9 285’s GPU falls to the card’s 2GB of GDDR5. This is on a 256-bit bus, and is clocked at 5.5GHz for a total memory bandwidth of 176GB/sec.

The R9 285 will have a rated typical board power (AMD’s analogue for TDP) of 190W. Notably this is only 10W higher than the Pitcairn based R9 270X despite the 40% larger SP count, or alternatively is 60W lower than the Tahiti based R9 280. While we don’t have a ton of details on the GPU at this time, taking into consideration the R9 270X comparison in particular, it’s clear that AMD has done some work on efficiency to squeeze out more compared to the GCN 1.0 based Pitcairn and Tahiti parts that R9 285 is going to be placed between.

The GPU itself is based on a newer version of AMD’s architecture, at least GCN 1.1 based on the presence of TrueAudio support. AMD has not formally announced the underlying GPU at this time, but given the timing and the specifications we believe it’s based on the new Tonga GPU, which was first announced for the FirePro W7100 earlier this month. In any case we don’t have much in the way of details on Tonga at this time, though we expect AMD to flesh out those details ahead of R9 285’s September 2nd launch. The biggest question right now – besides whether this is a “full” Tonga configuration – is whether Tonga is based on GCN 1.1 or something newer.

Based on some prior AMD statements and information gleaned from AMD’s CodeXL tool, there is reason to suspect (but not confirm) that this is a newer generation design. AMD for their part has done something very similar in the past, launching GCN 1.1 back on the Radeon HD 7790, but essentially hiding access to and details of GCN 1.1’s feature set until the launch of the Hawaii based R9 290X later in the year. Whether AMD is doing this again remains to be seen, but it is something we have seen them do before and don’t doubt they could do again. Though whether they will confirm it is another matter, as the company does not like to publicly differentiate between GCN revisions, which is why even the GCN 1.1 name is unofficial.


Sapphire's Radeon R9 285 Dual-X

Working for the moment off of the assumption that R9 285 is Tonga based and that it’s a GCN 1.1 part, we expect that performance should be a wash with the R9 280 while the R9 285 has an advantage on features. GCN 1.1 does have some mild performance optimizations to it that will give the R9 285 an edge, though it remains to be seen what the impact will be of the narrower memory bus. The fact that the Tahiti based R9 280X remains in AMD’s lineup indicates that if nothing else, it won’t match the performance of a full Tahiti configuration. Otherwise when it comes to features, being GCN 1.1 based means that the R9 285 will bring with it support for True Audio, support for bridgeless CrossFire thanks to the XDMA engine, GCN 1.1’s superior boost mechanism, and full support for AMD’s upcoming FreeSync implementation of DisplayPort Adaptive Sync (GCN 1.0 GPUs are not fully adaptive).

As for AMD, this offers the chance to refresh some of their oldest GCN 1.0 products with a more capable GPU while also cutting costs. While we don’t have die size numbers for Tonga, it is reasonable to expect that it is smaller due to the narrower memory bus along with the die size optimizations that we saw go into Hawaii last year, which means it will be cheaper to manufacture than Tahiti. This also brings down board costs, again due to the narrower memory bus and the lower TDP allows for simpler power delivery circuitry.

AMD will be positioning the R9 285 to compete with NVIDIA’s GeForce GTX 760, the company’s second-tier GK104 part. The GTX 760 performs roughly the same as the R9 280, so AMD need only not regress to maintain their competitiveness, though any performance lead they can squeeze out will be all for the better. The GTX 760 is frequently found at $239 – a hair under the R9 285’s launch price – so NVIDIA will hold a very slight edge on price assuming they don’t adjust prices further (the GTX 760 launched at $249 almost 14 months ago).

The R9 285 for its part will be launching at $249 on September 2nd. This will be a hard launch, and with AMD’s partners already posting product pages for their designs we suspect this will be a pure virtual (no reference card) launch. AMD also tells us that there will be both 2GB and 4GB cards; we’re going to have to see what the price premium is, as the suitability of 2GB enthusiast cards has been challenged by the presence of so much RAM on the current-generation consoles, which will have a knock-on effect on console-to-PC ports.

Though with the launch of the R9 285 and impending discontinuation of the R9 280, buyers looking at picking up an R9 285 in the near term will have to be on the looking for R9 280 on clearance sale. It’s already regularly found for $220 and lower, making it $30 cheaper than the R9 285 and possessing 3GB of VRAM to the R9 285’s 2GB. This will make the R9 280 a strong contender, at least until supplies run out.

Fall 2014 GPU Pricing Comparison
AMD Price NVIDIA
Radeon R9 290 $400  
  $310 GeForce GTX 770
Radeon R9 280X $280  
Radeon R9 285 $250  
  $240 GeForce GTX 760
Radeon R9 280 $220  
Radeon R9 270X $180  
  $160 GeForce GTX 660

Finally, coinciding with the launch of the R9 285 will be a refresh of AMD’s Never Settle bundles. The details on this are still murky at this time, but AMD is launching what they call the Never Settle Space Edition bundle, which will see Alien Isolation and Star Citizen as part of a bundle for all R9 series cards. The lack of clarity is whether this replaces the existing Never Settle Forever bundle in this case, or if these games are being added to the Never Settle Forever lineup in some fashion. AMD has said that current Silver and Gold voucher holders will be able to get the Space Edition bundle with their vouchers, which lends credit to the idea that these are new games in the NSF program rather than a different program entirely.

Both Alien Isolation and Star Citizen are still-in-development games. Alien Isolation is a first person shooter and is expected in October of this year. Meanwhile the space sim Star Citizen does not yet have a release date, and as best as we can tell won’t actually be finished until late 2015 at the earliest. In which case the inclusion here is more about access to the ongoing beta, which is the first time we’ve seen beta access used as part of a bundle in this fashion.

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  • lazarpandar - Saturday, August 23, 2014 - link

    Why would they not call this the 275? Reply
  • garadante - Saturday, August 23, 2014 - link

    I think the bigger thing to watch out for here would be 280s going on some nice sales. If I see them dropping to around $150~ after rebates, I'd be very tempted to pick up a second to Crossfire with my 7950. Then I'd be able to hold over until after this upcoming generation. The narrower memory bus and less VRAM seems like a huge turnoff considering the 384 bit/3 GB aspect of the 7950/7970 was what was so appealing with them over the competing 670/680 at launch. Reply
  • Flunk - Sunday, August 24, 2014 - link

    Might as well, I've got 2x 280x and there really isn't anything that stresses them until you get up to 4K resolution. I'm sure 2x 280 will last you quite a while assuming you're running at a normal resolution. Reply
  • chizow - Saturday, August 23, 2014 - link

    @ Ryan, pretty sure your specs table is off for the R9 290, it should still be 512-bit bus. Other than that this should probably read:

    "The R9 285 will take up an interesting position in AMD’s lineup, being something of a refresh of a rebadge/rebrand that spans all the way back to Tahiti (Radeon 7970)."

    Since the R9 280/X was more of a rebrand of the original Tahiti 7950/7970. Seems this card is about a year late, it would've made a lot more sense to launch this alongside the other GCN1.1 cards like Hawaii R9 290/X and R7 260/X Bonaire parts as the R9 280/X, instead its going to be confusing with this as the R9 285 and slower than the older 280 in higher resolutions or with higher levels of AA.
    Reply
  • JDG1980 - Saturday, August 23, 2014 - link

    Any efficiency gains are welcome, but dropping from 250W (nominal) to 190W with a slight performance hit isn't nearly as impressive as what Nvidia has done with Maxwell. This is going to have a hard time keeping up once the big Maxwell chips come out in a couple of months. Reply
  • R0H1T - Sunday, August 24, 2014 - link

    Except that AMD is "nearly" as efficient with their R7 265 as Nvidia is with the 750Ti ~
    anandtech.com/bench/product/1130?vs=1127

    Also the Radeon 2xx products are based on GCN 1.1 which is at least a year old, since the 7790 launched more than a year ago, while Maxwell is relatively new(er) & so till the time GCN 1.1x parts are launched alongside Maxwell's mid range offerings (later in the year) we'll not know which of the two is really more efficient.
    Reply
  • FriendlyUser - Sunday, August 24, 2014 - link

    Who cares is the 750Ti is more efficient? The performance difference is quite significance. Even the comparison with the 265 shows the 265 to be faster overall with only 3-4 db more noise at load.

    From my own experience (I own a 7950) the card is quite cool and reasonably quiet. Why should I care if the 750Ti has a lower TDP? What I want is good performance and price. Power efficiency only becomes an issue if you have excessive noise or huge PSU requirements. With the 285, clearly this is not the case.

    Nvidia speaks of power efficiency because this is all they've got.
    Reply
  • R0H1T - Sunday, August 24, 2014 - link

    So what exactly are you trying to say here ? I merely pointed out that Maxwell isn't all that efficient on the desktop as people are making it out to be, also the fact that cramming more transistors is simply not feasible on 28nm anymore that's why Nvidia & AMD both are waiting for greater access to 20nm fabs.

    This isn't about efficiency as it's highly impractical to expect a successor to 290(x) & 780(Ti) to be made on 28nm, so everyone will have to wait 6~12 months before the next gen (real) high end GPU's hit the market cause atm Apple & Qualcomm are way ahead in the priority list of TSMC.
    Reply
  • Samus - Sunday, August 24, 2014 - link

    Maxwell is twice as efficient per "core" as Kepler and about twice as efficient per SP as AMD's "Sea Islands" architecture. If nVidia releases a 1500-2000 core Maxwell GPU this year, AMD will be crushed at the top. The 640 Core 750Ti is the most powerful <80-watt GPU in the world by a huge margin. It can be dropped into practically any OEM system without need for a power supply upgrade.

    When you consider it is as fast or faster than a GTX660 or Radeon R7 260X (and sometimes as fast as an R9 270) I think its pretty obvious nVidia is going to reign the next generation of GPU architecture. AMD's current crop is already stretched so thin they throttle back from overheating (R9 290X)
    Reply
  • PEJUman - Sunday, August 24, 2014 - link

    ummm... who pays for your electricity bill? Reply

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