AMD coherent data fabric enables 100GB/s link between CPU and GPU

Posted on Tuesday, Aug 11 2015 @ 16:55 CEST by Thomas De Maesschalck
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AMD is working on a coherent data fabric that will eliminate PCIe latency, the first product to receive this technology will be an upcoming exascale-class HSA (Heterogeneous System Architecture) multi-chip-module (MCM) for the server market.

The new interconnect method will offer nearly seven times more performance than the traditional PCIe interface: four Global Memory Interconnects (GMI) will reportedly offer a latency-free 100GB/s link between the CPU and GPU, much more than the 15GB/s at about 500ns latency provided by PCIe x16.

The first MCM with the coherent fabric will reportedly feature a Zeppelin CPU (presumably with Zen-based cores) and a Greenland GPU with High Bandwidth Memory (HBM) on the same chip package. The slide below reveals the Greenland GPU promises 4 teraflops of raw computing power and mentions there's a 500GB/s link between the GPU and the HBM.

The chip will support DDR4-3200 memory, which will talk to the CPU at the same 100GB/s. The product is expected sometime in the 2016-2017 timeframe.

AMD coherent data fabric chip

Source: FUD Zilla

About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.

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