The AMD Llano Notebook Review: Competing in the Mobile Market
by Jarred Walton & Anand Lal Shimpi on June 14, 2011 12:01 AM ESTIntroducing Mobile Llano
Anand has provided our coverage of Llano’s architecture and he’ll have a preview of desktop performance, but he’s leaving the mobile coverage to me (Jarred). At a high level, the breakdown of Llano is really quite simple: take a K10.5 series CPU core (dual- or quad-core), pair it up with a DX11 capable GPU core similar to AMD’s Redwood line (5600/5600M or 6500M), and then mix in power gating and Turbo Core; bake everything in a 32nm process and you’ve got Llano. Easier said than done, of course, as K10.5 parts previously used a 45nm process while Redwood used 40nm, so AMD had plenty of work to do before they could realize the simplistic overview I just described; the result is what matters, though, so let’s break out our spoons and see how the pudding tastes. Here’s the overview of the mobile A-series APUs launching today.
| AMD A-Series Fusion APUs for Notebooks | |||||||
| APU Model | A8-3530MX | A8-3510MX | A8-3500M | A6-3410MX | A6-3400M | A4-3310MX | A4-3300M |
| CPU Cores | 4 | 4 | 4 | 4 | 4 | 2 | 2 |
| CPU Clock (Base/Max) | 1.9/2.6GHz | 1.8/2.5GHz | 1.5/2.4GHz | 1.6/2.3GHz | 1.4/2.3GHz | 2.1/2.5GHz | 1.9/2.5GHz |
| L2 Cache (MB) | 4 | 4 | 4 | 4 | 4 | 2 | 2 |
| Radeon Model | HD 6620G | HD 6620G | HD 6620G | HD 6520G | HD 6520G | HD 6480G | HD 6480G |
| Radeon Cores | 400 | 400 | 400 | 320 | 320 | 240 | 240 |
| GPU Clock (MHz) | 444 | 444 | 444 | 400 | 400 | 444 | 444 |
| TDP | 45W | 45W | 35W | 45W | 35W | 45W | 35W |
| Max DDR3 Speed |
DDR3- 1600 DDR3L- 1333 |
DDR3- 1600 DDR3L- 1333 |
DDR3- 1333 DDR3L- 1333 |
DDR3- 1600 DDR3L- 1333 |
DDR3- 1333 DDR3L- 1333 |
DDR3- 1333 DDR3L- 1333 |
DDR3- 1333 DDR3L- 1333 |
There are two different power envelopes for Llano right now: 35W and 45W. The former models end with an M while the latter end in MX. Don’t let the relatively high TDPs fool you, as similar to Intel we’re looking at maximum TDP while idle and low-load TDP will be far lower. Based on battery life, it appears that the entire test notebook consumes around 7.42W at idle. By comparison, a slightly larger dual-core SNB notebook consumes around 7.68W when idle, so we’re very close to parity at idle. As noted earlier, all APU models come with 1MB L2 cache per core, and Turbo Core allows for cores to clock up to higher values under the right circumstances. That could prove important, as clock-for-clock K10.5 cores can’t hope to keep up with Sandy Bridge, and Sandy Bridge parts are already clocking significantly higher.
On the CPU side of the equation, there are currently only dual-core and quad-core parts, so tri-core appears dead (or at least MIA for now). The other part of the APU is the GPU cores, and here there are three options. The A6 and A8 APUs are both quad-core, but A6 has 320 Radeon cores clocked at 400MHz compared to 400 cores at 444MHz—so the 6620G is potentially 40% faster. A4 APUs trim the GPU further, with 240 cores clocked at 444MHz, and they’re the dual-core parts. The 6620G could be up to 67% faster than 6480G, under the right circumstances. As Anand mentioned, right now all of the A-series APUs are coming from the “big Llano” die, but in the future we’ll see the A4 production shift to “little Llano” instead of using harvested die.
Vision and Radeon Branding
For 2011, AMD is simplifying their Vision branding with Llano, skipping the Premium, Ultimate, and Black modifiers and instead referring to the APU. Vision E2 refers to the dual-core E-series APUs, while the A4, A6, and A8 lines correlate directly with the A-series APUs. The Radeon brand continues as an important asset, so there will be sticker options to promote quad-core and dual-core CPUs with Radeon graphics. What about the Dual Graphics, though?
With the integrated GPU finally able to approach the performance of midrange mobile GPUs, AMD is making a return to hybrid CrossFire (IGP and a dGPU working together), though the official name is now apparently “Radeon Dual Graphics” or just "Dual Graphics"; we’ve also heard it referred to as “Asymmetrical CrossFire”, and we’ll use any of these terms throughout this article.
We first saw an attempt at hybrid CrossFire with the HD 2400 and the 790 chipset, and later that extended to HD 3400 cards, but it never really impressed as it was limited to desktops and you could still get far better performance by spending an extra $10 to upgrade from a 3400 to a 3600 dGPU. The 6620G fGPU is several times more powerful than the old HD 4250 IGP, making CrossFire potential useful, especially on laptops where the power savings from shutting off the dGPU are very significant.
With Radeon Dual Graphics, AMD introduces more brands. The various Fusion GPUs (fGPUs) only work in CrossFire with specific discrete GPUs (dGPUs)—nearly all of the 6400M, 6600M, and 6700M line are eligible—giving rise to several new Radeon names. If you start with a base of a Radeon HD 6620G and add a Radeon HD 6770M to it, the resulting combination is now called a Radeon HD 6775G2. Pair it with a 6750M and you get a 6755G2. The entirety of the list is depicted in the slide from above. For now these names are just going to be listed on the notebook spec sheet, the drivers themselves will report the actual GPU you have driving the panel you're connected to. AMD is still working out the right way to expose these names through software to avoid confusion.
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whoaaaaaaaa - Tuesday, June 14, 2011 - link
A lot. I think you are very out of touch. No one buys desktops anymore, everyone uses a laptop - and quite a few people want to WOW or COD on them.luniq - Tuesday, June 14, 2011 - link
Agreed. A lot of people I know uses laptop although they rarely need to take it with them and they game too.swaaye - Tuesday, June 14, 2011 - link
I don't think he is. Most computer users don't play games. All they need is a GPU that can run the OS's UI.cotak - Tuesday, June 14, 2011 - link
The sort of people who use laptops and are pushing the CPUs hard are in the reality of the real world a limited bunch. Those who really need the power aren't going to be on a laptop anyhow like you say. Most office staff never use to the full potential of their issued computers even when they were using pentium 4s. And I actually think you'll find a lot of office workers are still humping around a P4 in their laptop bag.This is especially true as a lot of work now a days are done server side. About the only "office workers" who pound their CPU are those with big spread sheets. Even there I do not think you'll find many office workers who'd have an issue with most modern CPUs. They'll just go for a smoke or coffee break while it crunches.
And what review did you read that say there's no advantage in battery life? If you are pushing a game Llano lasts twice as long on the same battery.
voidi - Tuesday, June 14, 2011 - link
Lots of potential, they managed to find a valid niche in Intel's Netbook Hardware Portfolio. I think it's futile to argue about the success of this solution already, as the price will be the determining factor.As I see it, Llano has the potential to bring AMD back in the mobile market on a reasonable scale, but it also has the potential to utterly fail. Since it can't compete in the high-end area in either CPU or GPU performance, it will all depend on the value for your money. If the price is low enough, Llano will fill its niche quite comfortably.
Personally, I will wait for Trinity and Ivy Bridge, as both promise significant improvements and will likely be priced close to their predecessors.
jaydee - Tuesday, June 14, 2011 - link
On the one hand, I'm pleasantly surprised that AMD was able to bring the power draw of a K10/10.5 down to those levels, while adding decent GPU. It's a big step up for the to be in the discussion again for laptops. I don't think anyone could have reasonably expected them to go from Danube up to Intel's SB performance level overnight, so from that perspective, it's a big jump for them.On the other hand, it couldn't be more obvious that this product should have been competing against Arrendale about 18 months ago at the price point introduced today. I want to like this product badly, but it's so hard given it's CPU performance. Sure it's great for mid-range mobile gamers, but why would anyone else look at llano? Hopefully AMD can make just as big of a stride with BD-based mobile Fusion within the next 24 months, and then we can perhaps take AMD seriously in the bigger mobile market segments.
Gunbuster - Tuesday, June 14, 2011 - link
Will this mean the lowest common denominator HP $450 laptop of the week the everyone on a budget inevitably buys at retail when they are in a time crunch will suck less?I sure hope so.
Boissez - Tuesday, June 14, 2011 - link
I actually like the performance as it seems better balanced than in the dual-core Sandy bridges, ie., about 50% performancethe in single threads apps, 80% in multi-threaded apps and 200% in gaming. IOW better suited towards consumer needs. And battery life is good too.What AMD needs to work on though is lowering the TDP. A8-3500 performance in a 25W enveloppe would allow this to be a good alternative in the upcoming ultrabooks (especially because you can't fit a discrete GPU in those)
Boissez - Tuesday, June 14, 2011 - link
Oh yeah and make all of those APU's compatible with 1600 and 1866 Mhz RAM. RAM speed seems to be a major bottleneck in this platform.ET - Wednesday, June 15, 2011 - link
I think that even lower performance in 25W would be attractive, but it might eat into the E-350 market, unless it's priced significantly higher. I don't think it'd be a big problem for AMD to lower power to that point (certainly for A4), but they're probably waiting to see where the market goes with the current Llano APU's. I believe we'll see a 25W version later this year.