Unknown AMD SoC Features 8 Bulldozer Modules, 1024 Stream Processors, 512-Bit Memory Bus [UPDATED]

Mysterious Block Diagram Shows Ultra-High-Performance AMD System-on-Chip

by Anton Shilov
05/08/2013 | 07:47 PM

UPDATE: A Beyond 3D web-site forum member has composed a better-looking image of the leaked block-diagram, which is added to the news-story.


A block diagram released by a Chinese web-site shows an ultra-high-performance system-on-chip from Advanced Micro Devices that should offer rather extreme general-purpose performance, very high integrated graphics performance and plenty of memory bandwidth. The drawing may easily be a fake, a new illustration of Xbox Infinity SoC, a block-diagram of upcoming Kaveri-like accelerated processing unit on steroids, or an all-new new graphics processor.

The chip, which block diagram was published by ChipHell web-site is claimed to be code-named Hawaii graphics processing unit that has sixteen serial processing units (and eight floating point units), 4096 stream processors, 256 texture units and 64 raster operating units. While installation of general-purpose/serial processing units into graphics processors seems to be a trend (since Nvidia Corp.’s Maxwell GPUs will have ARM-compatible Denver CPU cores), it does not seem that this is the case of this particular chip. In fact, it does not seem to be a GPU at all.

Although the image of the system-on-chip is extremely blurry, it is evident (if enlarge, sharpen, filter it and then add some logic) that it has all the blocks that the next-generation accelerated processing units are supposed to have. The SoC has security co-processor (ARM Cortex-A5), AMD-V, AMD-P blocks, unified northbridge (UNB), system controller hub (SCH), HyperTransport links, PCI Express 3.0 lanes, CrossFireX interface, eight 72-bit ECC DDR3 memory controllers, display controller, eight Steamroller-class x86 modules (with two integer/SPU cores, one FPU and L2 cache), unified L3 cache as well as a decent GCN architecture-based graphics processing unit.



The chip could easily be a next-generation Kaveri-like APU for high-end desktops as well as servers with 16 integer cores, 8 floating point units, L3 cache, graphics engine with 1024 stream processors as well as eight-channel DDR3 memory controller with ECC (which should actually support GDDR5 memory as well, based on previously published information). The default Kaveri APU should feature up to four Steamroller cores (1, 2). While the "APU on steroids" should be very large, even when made using 28nm process technology, such a chip could easily rival Intel Corp.’s Core i-series “Haswell” microprocessors in terms of performance thanks to vast general-purpose and graphics processing capabilities.

Given the fact that 512-bit bus is a clear overkill for desktop and even server applications, the chip could be the APU of Xbox Infinity. The probability of this is pretty low since the chip has HyperTransport link, CrossFireX multi-GPU interface as well as ECC support, neither of which are needed for game consoles. At the same time, the chip does not seem to feature eDRAM or eDRAM-related logic.

Even though the chip seems to have all the building blocks of a modern APU, it may easily be a complete fake.

AMD did not comment on the news-story.