The Brazos Review: AMD's E-350 Supplants ION for mini-ITX
by Anand Lal Shimpi on January 27, 2011 6:08 PM ESTVideo Decode Capabilities: Is Brazos the New ION?
While Atom may have been the right product at the right time, it was a very conservative architecture paired with a very conservative platform. For netbooks and nettops Intel chose to assume no risk at all, pairing Atom with the proven 945 chipset. As a result, it left a lot of room for innovation - something NVIDIA saw and capitalized on with ION.
While VIA created the mini-ITX form factor, it was really NVIDIA that made it interesting. The first mini-ITX ION platforms gave you almost everything you needed to build a fully capable HTPC. For video playback, with NVIDIA’s GPU (or at least its fixed function decode pipeline) doing the heavy lifting, the fact that you had an anemic Atom a couple centimeters away didn’t matter. The problem with ION is that it had no future. Without a DMI license, NVIDIA would not be able to build future versions of ION for Atom’s successors. Even after the settlement it’s unlikely we will ever see modern versions of ION, especially considering that Intel’s 2011 Atom platform (Cedar Trail) will finally integrate H.264 decode acceleration in Q4.
Where Intel is conservative, AMD will innovate. Brazos adds a number of advantages from a media standpoint over Atom. There’s native HDMI support and a full implementation of AMD’s UVD3 decode engine supporting hardware H.264, VC-1 and MPEG-2 acceleration. Although both of these advantages are also enjoyed by ION the next feature isn’t. Brazos supports Dolby TrueHD and DTS-HD MA bitstreaming over HDMI. From a feature standpoint, Brazos is even more complete than ION.
I ran MSI’s Brazos board through our Media Streaming compatibility suite. Below is Brazos’ compatibility score compared to the other devices and HTPCs we’ve put through the suite:
Failed Tests
- 1080p60 60 fps L5.1 H.264
- L5.1 H.264 (16 reference frames)
- FLAC, ASS Subs - High CPU Utilization
- HD Real Media
- Deinterlacing
Numerically, Brazos actually falls behind ION. Allow me to explain why. Our Media Streaming suite tests virtually everything you might throw at a HTPC. When it comes to the most commonly found content, Brazos excels. It can handle Blu-ray discs (although there’s no Blu-ray 3D support), it can deal with 1080p x264s commonly found online and it even accelerates Flash video (more on this later). Brazos’ UVD3 however is tied to clock speed, and the GPU clock of the Radeon HD 6310 is pretty low at 500MHz. As a result, Brazos fails certain tests. The platform is incapable of accelerating and playing back 1080p60 H.264 video. Very little content falls into this category, however if you want to play it you can’t on Brazos. The good news is 1080i60 works just fine.
Brazos’ GPU also fails all of our deinterlacing tests, something we noticed in reviews of AMD’s entry level GPUs. The higher end models don’t have an issue here but the lesser equipped models do. Again, chances are that you won’t want to watch interlaced content on your Brazos HTPC so this is likely not a big issue.
The other shortcomings are videos with components that aren’t accelerated by UVD3. For example, HD Real Video chugs on Brazos as does our heavy FLAC + ASS subs test. If you’re playing non-3D Blu-ray content or 1080p24 x264s you find on the web, Brazos will easily fit the bill. It’s the more eccentric content that you’ll run into CPU limitations with.
Since the Radeon HD 6310 is derived from AMD’s desktop GPUs we get full 23.976 fps support when you select 23Hz in AMD’s Catalyst driver:
Selecting 24Hz yields a 24.000Hz refresh rate.
As I mentioned earlier bitstreaming both TrueHD and DTS-HD MA are supported over HDMI:
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djfourmoney - Thursday, January 27, 2011 - link
You can build a sub-$350 HTPC with this! If you can recycle some parts from any of your other builds you might be able to get it under $300. I built a ASRock based HTPC based on the price expected for that board ($110) and it comes in at $319 before taxes and shipping. Careful shopping might avoid that.Run Mediabrowser with TV and GameTime! Plug-ins.
You can now throw away your Cable Box SD or HD. If you have standard cable, turning in your box and building a HTPC around one of these boards will pay for itself in about a year.
If you get HD and Premium Channels, hopefully SiliconDust's 3 Tuner CableCard adapter will be out before NFL Training Camp.
For Direct TV/Dish Network/AT&T U-verse, you'll be able to use Hauppauge Colossus with Component Input, eliminate issues with the HD-DVR USB version. As long as they don't cripple the component output, there's no PQ difference.
Khato - Thursday, January 27, 2011 - link
I've been somewhat disappointed with the lack of actual investigation into how changes in memory bandwidth affect this new generation of integrated GPUs - both on Brazos here as well as Sandybridge earlier. The direct comparison to a 5450 here is interesting, but since it wasn't stated I'm guessing those were stock 5450 numbers, not a 5450 underclocked to be the same frequency core/memory?The primary reason for it being a point of interest is that the current rumor has Llano at anywhere from 4x to 6x the shader resources, but only 2.4x the potential memory bandwidth. More likely 2x in any actual systems though given that anything above DDR3 1333 carries a decent premium. So if Brazos is already seeing hints of memory bandwidth limitations...
Anand Lal Shimpi - Thursday, January 27, 2011 - link
Those were stock 5450 numbers, and you are correct - memory bandwidth is an issue (one of Sandy Bridge's "tricks" is the shared L3 cache, it helps mask memory bandwidth limitations quite well as it is currently used for Z operations among other things). I expect that Llano will be much quicker than the E-350, remember that in many cases we're not necessarily GPU bound but rather CPU bound in these game tests.I will continue to play with performance on Brazos but I expect that once I've got Llano in house I'll be able to get a better idea of how bad the memory bandwidth limitations actually are.
Take care,
Anand
Khato - Friday, January 28, 2011 - link
Thanks for the reply. The CPU vs GPU bound comment actually sparked another point of curiosity - how does the performance picture change as resolution increases?There are quite a few games where the performance increase going from integrated to either the 5450 or 5570 is basically the same, implying that it's CPU limited and something about the integrated graphics decreases the performance. The unknown being whether that something is a constant, a slight latency hit due to whatever arbitration scheme is used between CPU and graphics for example, or if it will scale with the load placed upon the GPU, as would be the case for memory bandwidth.
This certainly has me looking forward to at last getting to see how Llano graphics performance is in a few months. I'd find it all too amusing if the better integration in Sandybridge resulted in graphics performance on par with a memory constrained Llano.
bjacobson - Saturday, January 29, 2011 - link
I was thoroughly surprised the e350 coped as well as the dedicated cards using shared RAM.Was not expecting that.
Speed3mon - Thursday, January 27, 2011 - link
this comment... kinda gay.. sry but trueAloonatic - Friday, January 28, 2011 - link
I don't think that even the staunchest homophobe would even go as far as to associate being gay with the nonsense that the OP wrote.It'[ a shame that there isn't a store that fanboys have to shop in, where their beloved companies can rip them off royally, as that seems to be their want.
His comment wasn't gay, it was just sad, and ill-conceived, which might be how their parents probably view them too, in hindsight :o)
etudiant - Thursday, January 27, 2011 - link
The Zacate die size is comparatively minute at 75mm2, about a quarter the size of the Thuban.That translates to perhaps one twentieth of the manufacturing cost, given yields are much better for smaller die. Should be very helpful for AMD if they can deliver in quantity.
GeorgeH - Thursday, January 27, 2011 - link
I'm very impressed. Does anyone have an idea when Intel and VIA might respond with updated products?Anand Lal Shimpi - Thursday, January 27, 2011 - link
Intel's 32nm Atom refresh will appear in Q4 2011.Take care,
Anand