AMD Kaveri APU Architecture, Specifications And Prices Revealed – 2.41 Billion Transistors Inside 245mm2 Die

AMD Kaveri APU Architecture, Specifications And Prices Revealed

The biggest architectural change Kaveri APU features is the use of the latest 28nm Steamroller architecture that
is a true multi-threaded architecture focusing on enhancing the IPC
(Instruction-Per-Cycle) by upto 20%. In each module, two separate
threads are provided with their own parallel instruction decoder, due to enhancements, the Kaveri APU die measures at 245mm2 with 2.41 Billion transistors
crammed inside the die. The Kaveri APU is built upon the 28nm SHP.
Steamroller is a completely new architecture hence there are improvements across the board which can be seen in the slides at the end of this article.
The most significant enhancement Kaveri would adopt is the HSA
(Heterogeneous System Architecture) powered with the new HUMA
enhancements which allow coherent memory access within the GPU and CPU.
HUMA would make sure that both the CPU and GPU would have uniform access
to an entire memory space which would be done through the memory
controller. This would allow additional performance out of the APU
incase the GPU gets bandwidth starved. This also suggests that faster
memory speeds would result in better overall performance from the graphics card. Now with all the architectural talks done, let’s get on with the A10-7850K itself.

On the graphics side, we are getting the latest GCN architecture over
the VLIW4 featured on previous AMD APUs. The die has upto 8 GCN compute
units which feature AMD AudioTrue technology, AMD Eyefinity tech, UVD,
VCE, DMA Engine and the addition of coherent shared unified memory.
Being based on the same GPU as Hawaii, the Kaveri APU die has 8 ACE
(Asynchronous Compute Engine) which can manage 8 Queues and have access
to L2 Cache and GDS .

For the first time, AMD has called the GCN and Steamroller cores as
the Compute Unit with 12 compute units (8 GCN and 4 Steamroller cores).

A compute core is an HSA enabled hardware block, that is
programmable, capable of running atleast one process on its own context
and virtual memory space, independently from other cores.

The Compute cores would be directly connected to a unified coherent memory.

The Kaveri APU can scale down to server platforms, from the high-end
desktop PCs all the way to notebooks, servers and embedded applications.
The Kaveri APU would come with TDP’s as high as 95W, down to 35W on
mobility products and 15W in embedded applications.
For the lineup, AMD would launch only two APUs to kickoff 2014 which
include the A10-7850K and A10-7700K while the A8-7600 would launch later
in Q1 2014.

AMD A10-7850K

On with the specifications, the A10-7850K as expected would remain
the flagship Kaveri APU of 2014 boasting 4 Steamroller cores, 4 MB L2
Cache and clock speeds of 3.7 GHz base and 4.0 GHz turbo. On the
graphics side, the APU would feature 8 Compute Units resulting in 512
stream processors clocked at 654 MHz base and 720 MHz in boost. The APU
is fully unlocked allowing users to overclock the chip past the limits
and supports DDR3-2133 MHz and comes in a 95W TDP package. The A10-7850K
would cost $173 US officially.

AMD A10-7700K

The A10-7700K is another unlocked chip featuring the Steamroller core
architecture with a max boost clock of 3.8 GHz and base clock of 3.5
GHz. It features 4 MB of L2 cache while the GPU side ships with a GCN
graphics die featuring 6 shader units equaling to a total of 384
Stream processors clocked at 720 MHz. The A10-7700K features a TDP of
95W so we may see one Kaveri APU part to feature 65W TDP. The A10-7700K
would cost $119 US officially.

AMD A8-7600

The A8-7600 would be the last quad core variant in the Kaveri APU
lineup featuring 3.1 GHz base and 3.8 GHz turbo frequencies with 4 MB L2
cache, 65W TDP and DDR3-2133 MHz support. The graphics side would
include 384 Stream processors (6 Compute Units) and a core speed of 654
MHz base and 720 MHz boost. The APU would cost $119 US at launch.
Specifications for the entire lineup can be seen here.

AMD Kaveri APU 2014 Lineup:

AMD Kaveri APU Die Shot:

AMD Kaveri APU Architecture and Slides: