Fusion Complete: AMD's "Brazos" Promises Fierce Challenge to Atom
November 9, 2010 4:43 PM
AMD's Zacate E-350 APU is pint-sized compared to AMD's monolithic previous gen V105 Geneva chip pair.
(Source: Hot Hardware)
AMD helps inform the public what an "APU" is (hint: What does GPU+CPU=?).
(Source: AMD via Hot Hardware)
Zacate adds support for two memory DIMMS (click to enlarge).
(Source: AMD via Hot Hardware)
Zacate and Ontario are only the first two members of AMD's APU invasion, which will soon hit netbooks and notebooks as well.
(Source: AMD via Hot Hardware)
APU is two Bobcat cores and a DX11 GPU
Intel's Atom processor has long enjoyed a reign as undisputed king of entry-level netbooks and ultraportables. AMD is at last prepared to challenge that position with its long-awaited "Fusion" processor.
chips are done
and in 2011 AMD plans on launching 4 processors:
The E-xxx processors are parts in the
, while the C-xxx parts belong to the
series, which is more heavily aimed at ultraportables. Together these parts collectively belong to the
a leap forward for netbook computing or a step backward from the modest performance of Atom? The answer is a bit of both.
Finally, a Solid IGP
The clear upside here is the integrated GPU. In its high-end
models, AMD has packed two Bobcat cores. Both the single-core and dual-core chips also feature an on-chip DirectX 11 GPU with 80 ALUs -- twice the number in
, AMD's previous integrated graphics solution.
The fact that AMD incorporated its integrated GPU directly on the same die as its CPU cores isn't exactly revolutionary, in so much as Intel already did this with its
(Atom) chips launched earlier this year. It
revolutionary in that it is the first on-chip GPU whose performance isn't horrendous and that it is the first on-die IGP to have a high-bandwidth link to the CPU (
oddly opted for a slower FSB-like link on-die between the GPU core and CPU core[s]).
uses the Intel GMA 3150, which lacks dedicated vertex shader hardware. As a result 3D performance is a miserable experience. The GPU's overall weakness makes even playing trying to play back high definition video a painful prospect.
's Radeon GPUs should offer decent entry level gaming performance and should play HD video (including Blu-Ray) with ease.
Memory and I/O
only supports a single 800 MHz DDR3 DIMM,
offers the support for two 800-1066MHz DDR3 DIMMs.
While specifics on the smaller uni-core
chips aren't available, AMD has revealed that its
consists of a 19 x 19-mm, 413-ball BGA package with a 75 mm² die "advanced processing unit" (APU) (GPU+CPU) inside. That's ever-so-slightly smaller than Intel Atom's single core entry that features a 22 mm x 22 m package and a 87 mm² die.
The APU is hooked up to AMD's chipset unit, which is named
chip handles part of the I/O duties, offering a wealth connections including four PCIe Gen1 lanes, four PCIe Gen2 lanes, six 6 Gbps Serial ATA connections, 14 USB 2.0 connections, and built-in fan control logic.
Together the APU core and
chipset form the
The 6 Gbps SATA connections should allow for ultra fast SSD access, though it seems a bit strange to be considering pricey hard drive options with a budget-minded netbook chip. The four PCIe Gen1 lanes can be used with the ethernet and wireless (802.11n) connections, freeing up the
core's PCIe gen2 lanes for use with a discrete GPU.
Thus netbooks or mobile internet devices sporting the
APU could in theory also offer a discrete GPU. It's unclear at this point whether you could switch to the integrated GPU to decrease power consumption and extend battery life.
Speaking of battery life, the one area that
appears to have AMD's
beat is in battery life. Its dual core Atom N550 is clocked similar to the E-350, but has about half the power consumption. Of course the lean power footprint is due to the garbage graphical performance. We're not sure if that's something to brag about -- even in the mobile space.
Overall, though, when you consider chipset power (
is paired with the NM10 chipset) the result is that an Atom-based netbook's internals will consume about 16 W, while AMD expects a platform TDP of 21 W for
(possibly less for
At the end of the day AMD is claiming the E-350-equipped
platform will last for about 8.5 to 9 hours on a fully charged 55Wh laptop battery, while an
may get 10.5 hours. An Atom platform netbook will last slightly longer.
At this point it's hard to draw definitive conclusions as a) Intel may have new Atom designs up its sleeve for 2011 and b) AMD hasn't delivered on
That said Intel definitely has cause for concern here. AMD's chips still are more power hungry than their Intel siblings (+5 watts for the entire platform), but the roughly 33 percent power increase reportedly allows a > 50 percent performance bump in GPU-intensive applications. With even everyday programs like Firefox and Flash using GPU acceleration these days, this could offer faster performance even for non-gamers.
is only the budget-minded beginning of AMD's APU invasion. It will be
followed by the
on notebooks), which will feature a beefier GPU and a more powerful modified K10.5 core design (not quite a
, as some pointed out).
At this point Intel's most compelling alternative to
is to pair itself with NVIDIA's ION chip. But that approach would likely negate much of Intel's power advantage, and further it cuts into Intel's bottom line, as it would have to either cut the cost of its chips for OEMs or end up double-charging customers for their graphics.
Atom has enjoyed a virtual monopoly on the netbook world, but in 2011 it will likely meet its x86 match in
. And if that wasn't enough to keep the Santa Clara chipmaker's executives up at night, ARM processors, fresh off their tablet takeover, will likely continue to trickle into the netbook space. And those ARM processors have the potential to blow both Atom and
awy in terms of processing power-per-watt.
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