RX 560 & RX 550 (& Polaris 12 Too!)

Third up is the Radeon RX 560, and this is a little different than the higher-end cards. Whereas the RX 580 and RX 570 are essentially higher clocked versions of their RX 400 counterparts, RX 560 is a new configuration altogether. AMD never shipped a fully enabled Polaris 11 desktop card in the last year as part of the RX 400 series – though they’ve been showing up in laptops like the MacBook Pro – meaning that AMD had held on to another two CUs that they are finally enabling for the RX 560. As a result this card is gaining more than a clockspeed bump.

AMD Radeon RX 560 Specification Comparison
  AMD Radeon RX 560 AMD Radeon RX 460 AMD Radeon R7 360 AMD Radeon R7 260
Stream Processors 1024
(16 CUs)
(14 CUs)
(12 CUs)
(12 CUs)
Texture Units 64 56 48 48
ROPs 16 16 16 16
Base Clock 1175MHz 1090MHz N/A N/A
Boost Clock 1275MHz 1200MHz 1050MHz 1000MHz
Memory Clock 7Gbps GDDR5? 7Gbps GDDR5 6.5Gbps GDDR5 6Gbps GDDR5
Memory Bus Width 128-bit 128-bit 128-bit 128-bit
Transistor Count 3B 3B 2.08B 2.08B
Typical Board Power 60-80W <75W 100W 95W
Manufacturing Process GloFo 14nm GloFo 14nm TSMC 28nm TSMC 28nm
Architecture GCN 4 GCN 4 GCN 1.1 GCN 1.1
GPU Polaris 11 Polaris 11 Bonaire Bonaire
Launch Date 05/2017 08/08/2016 06/18/2015 01/14/2014
Launch Price $99 $119 $109 $109

By the numbers, the additional two CUs give the RX 560 a 14% boost in shader and texture throughput. Coupled with that are some modest clockspeed increases for both the boost clock and the base clock. The boost clock is being bumped up from 1200MHz to 1275MHz (6%) and the base clock from 1090MHz to 1175MHz (8%). Coupled with the increased CU count, and we’re looking at a performance improvement on paper of around 22%. That said, the ROP count isn’t changing, so the actual performance improvement will likely be in the middle of those values.

When it comes to memory, AMD has only mentioned 4GB cards thus far. Though given the target market and the fact that the higher-end RX 500 cards are getting mixed configurations, I wouldn’t be too surprised if we see some 2GB cards here as well. AMD has not disclosed the memory clocks, but as RX 460 already shipped with 7Gbps GDDR5, I’m expecting the same here. So memory bandwidth would be identical to RX 460.

Things are particularly interesting for power consumption. Whereas the high-end Polaris cards are both seeing their TBPs increase this generation, the RX 560 is covering a wider range. The official TBP is 60 to 80W. AMD’s partners will be releasing both sub-75W versions that don’t require a PCIe power connector, and 75W+ versions that do. We’re told that the 75W+ versions will be the more common of the two. What’s not clear right now is whether the sub-75W models will get the same clocks, as board partners can turn down the power limit without turning down the official clockspeeds, at the cost of increased power throttling.

Moving on, unlike the RX 580, RX 570, and RX 550, the RX 560 isn’t launching this week. Rather it’s going to be launching in early May. Prices on these cards will start at $99, which is a good deal lower than where the RX 460 launched at, though consistent with its pricing over the last few months. The competition for the card will be NVIDIA’s GeForce GTX 1050, which is still priced at $109, but is not uncommon to see on sale at $99.

The target market for the RX 560 will be lower-end 1080p gaming. It’s not nearly as fast as the RX 570, so that means dialing back on graphics quality a bit to sustain good framerates, but it’s also some $70 cheaper.

AMD Radeon RX 550 Specification Comparison
  AMD Radeon RX 550 AMD Radeon R7 250X AMD Radeon R7 250
Stream Processors 512
(8 CUs)
(10 CUs)
(6 CUs)
Texture Units 32 40 24
ROPs 16 16 8
Base Clock ? 1000MHz 1000MHz
Boost Clock 1183MHz N/A 1050MHz
Memory Clock 7Gbps GDDR5 4.5Gbps GDDR5 4.6Gbps GDDR5
Memory Bus Width 128-bit 128-bit 128-bit
Transistor Count 2.2B 1.5B 1B
Typical Board Power 50W 95W 65W
Manufacturing Process 14nm TSMC 28nm TSMC 28nm
Architecture GCN 4 GCN 1.0 GCN 1.0
GPU Polaris 12 Cape Verde Oland
Launch Date 04/20/2017 02/10/2014 10/11/2013
Launch Price $79 $99 $89

Last and literally the least is the Radeon RX 550. This is a particularly interesting card because it has no Radeon RX 400 series analogue. In fact the GPU it’s based on is brand new; this is the first product to get it.

At the heart of the RX 550 is AMD’s new Polaris 12 GPU. This is an even smaller, lower performance, and lower power GPU than Polaris 11. It features just 8 CUs – half as many as Polaris 11 – but a full 128-bit memory bus. Overall Polaris 12 is comprised of 2.2B transistors, coming in at a die size of 101mm2. Interestingly, this is not all that much smaller than Polaris 11; AMD has shaved off just 800M transistors and 22mm2, about 22% of the transistors and 18% of the die area respectively. So AMD is definitely in the area of diminishing returns, as fixed function hardware and interfaces are now taking up a significant fraction of the die area.

Polaris 12 comes as a replacement for the equally quirky Oland GPU, which was released all the way back in late 2012 in laptops, and 2013 in desktops as the Radeon R7 250/240. Oland was a cost-optimized GPU for low-end devices, and as a pairing partner for CrossFire with AMD’s APUs. Polaris 12 in turn fills much of this same role. If it’s anything like Oland, Polaris 12 will have other features stripped out (e.g. Oland didn’t have a video decoder), but we don’t have any further details on Polaris 12 at this time.

The RX 550 in turn will ship with a Polaris 12 clocked at 1183MHz for the boost clock, while the memory clock is unknown. Practically speaking, I’d expect this to deliver around half the performance of an RX 560, but it may do better than expected depending on the ROP configuration. Unexpectedly, it should be also flush with memory bandwidth. While AMD has not announced the memory clocks, it will have a full 128-bit GDDR5 memory bus. So memory bandwidth could be comparable to RX 560, giving it a lot more bandwidth per FLOP and helping to offset the lack of shader resources.

Polaris 12 is primarily destined to live its life in laptops – a similar fate as Polaris 11 – but AMD is starting off with the desktop ahead of a big laptop push later this year. The desktop card will come with 2GB of VRAM and will be priced at $79. This is not a massive amount of savings compared to the $99 RX 560, but then as I’ve stated before, AMD is getting into diminishing returns here. Sub-$100 cards have to give up a lot of performance for a small decrease in price.

Unlike the other RX 500 cards, the RX 550 isn’t meant to replace earlier AMD cards. If you have a Radeon R7 250, the odds are your entire system is due for an upgrade. Instead it’s being positioned as a step-up card for system owners looking for something better than an iGPU, but without taking too big of a hit to the pocket book. Practically speaking, the target market for the RX 550 is a mix of entry-level gaming and HTPCs. On the former the card should be a good bit faster than an iGPU and more than suitable for MOBAs and other mass-market games, and in the case of the latter, it’s AMD’s lowest-power card that features both HDMI 2.0 and a video decoder (and even Freesync support). The 50W TBP means that low-profile designs can be offered, making is a good pairing for slim HTPCs.

The RX 550 will be launching later this week, on April 20th.

Intro, RX 580, & RX 570
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  • Meteor2 - Tuesday, April 18, 2017 - link

    I just want to give the 550 a cuddle
  • Der Keyser - Tuesday, April 18, 2017 - link

    I'm missing a bit of information:

    I'm a photographer and are solely looking for a GPU that will drive 3x 4K displays fast and fluently in desktop mode - no need for gaming. I have a mini-ITx machine so as little noise as possible is preferred. Will a RX550 suffice for that?

    I cannot se how many displays - and which interfaces - the GPU's support. I would prefer 3 x DIsplayport, but HDMI 2.0 will suffice - DVI-D will not drive 4K properly.

    Will both the rx560 and rx550 support zero fan speed idle for normal desktop mode (no 3D accelerated workloads)?

    Or should I just upgrade my machine to a Kaby Lake or the upcoming Coffe lake CPU and use the iGPU for my needs? Not sure 3 x Displayport is possible with Kaby Lake - maybe with Coffe Lake?
  • kn00tcn - Tuesday, April 18, 2017 - link

    but the cpus arent 'zero fan speed', so why do you need such a feature? a large enough slow enough fan is quite close to silent

    you'll have to read the product pages of every brand's card & model if you insist on zero fan (if it cant be stopped in software), fan speeds have nothing to do with the gpu maker
  • Ryan Smith - Wednesday, April 19, 2017 - link

    The concern you should have right now is that any low profile cards are unlikely to include 3 ports, especially as vendors have dropped mDP from consumer cards. Full profile cards will, but for legacy reasons you can count on one of those being a DVI port, so we're back to square one. In fact of all the cards I've seen so far, all of them seem to be using the same AMD PCB with 1x DP, 1x HDMI, 1x DVI.

    As for zero fan speed idle, that will be up to the specific card vendor. There's no way to know now.
  • Der Keyser - Wednesday, April 19, 2017 - link

    Yeah, that's the problem. My mini-ITX machine will not hold a full lenght dual-slot GPU which. Currently is needed for for a GPU with 3x displayport and zero fan speed idle.

    Really strange the no vendor has made a specialized card to cater for this niche. I can't be the only non-gamer wanting to go 3 x 4K display.

    the R9 Nano card seems interesting, but I cant figure if it will go zero fan speed idle.
  • Mugur - Wednesday, April 19, 2017 - link

    I use 2 x 1440p Dells at work from my notebook with a single DP output (daisy-chained). I think this is a feature since DP 1.2. So a cable from notebook to 1st monitor and another cable from monitor 1 to monitor 2.
  • Der Keyser - Wednesday, April 19, 2017 - link

    Should mention my machine will take a dual-slot card, it's only the length thats very restricted.

    And the R9 nano card is pretty expensive considering I don't need all that GPU power
  • Der Keyser - Sunday, April 23, 2017 - link

    Jeezz, don't know why i didn't think of the workstation cards. They are just what I need.
    A nvidia quadro P600 does exactly what I want with 4 x displayport and single slot setup.
    And it's less than 200$ :-)
  • Simon42 - Friday, April 21, 2017 - link

    I have an RX 460 plugged into a single 4k TV inside a Silverstone FT03 mini itx case. It's at 100% as soon as I use Chrome or SolidWorks intensively, so it gets over its 60° silent fan limit often... The memory improvements on RX 560 are interesting to me, but I think 4k is a good workout for the whole computer so running multiple monitors might be a challenge without better hardware (I'm running a 3570K Ivy Bridge).
  • xMiracle45 - Tuesday, April 18, 2017 - link

    What a Joke its clock boosted 400 series. Meanwhile over at Nvidia they are eating up the market with the 10 series. Should have Launched Vega in the first quarter. Not sure why AMD has fallen so far off the competitive market with their graphics cards the 7870's use to be the go-to.

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