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Xilinx Virtex UltraScale+ FPGAs incorporate 32 or 64Gbits of HBM, delivers 20x more memory bandwidth than DDR

Xilinx Employee
Xilinx Employee
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Today, Xilinx announced four members of a new Virtex UltraScale+ HBM device family that combines high-performance 16nm Virtex UltraScale+ FPGAs with 32 or 64Gbits of HBM (high-bandwidth memory) DRAM in one device. The resulting devices deliver a 20x improvement in memory bandwidth relative to DDR SDRAM—more than enough to keep pace with the needs of 400G Ethernet, multiple 8K digital-video channels, or high-performance hardware acceleration for cloud servers.

 

These new Virtex UltraScale+ HBM devices are part of the 3rd generation of Xilinx 3D FPGAs, which started with the Virtex-7 2000T that Xilinx started shipping way, way back in 2011. (See “Generation-jumping 2.5D Xilinx Virtex-7 2000T FPGA delivers 1,954,560 logic cells using 6.8 BILLION transistors (PREVIEW!)”) Xilinx co-developed this 3D IC technology with TSMC and the Virtex UltraScale+ HBM devices represent the current, production-proven state of the art.

 

Here’s a table listing salient features of these four new Virtex UltraScale+ HBM devices:

 

 

Xilinx UltraScale Plus HBM Device Table.jpg

 

 

 

Each of these devices incorporates 32 or 64Gbits of HBM DRAM with more than 1000 I/O lines connecting each HBM stack through the silicon interposer to the logic device, which contains a hardened HBM memory controller that manages one or two HBM devices. This memory controller has 32 high-performance AXI channels, allowing high-bandwidth interconnect to the Virtex UltraScale+ devices’ programmable logic and access to many routing channels in the FPGA fabric. Any AXI port can access any physical memory location in the HBM devices.

 

In addition, these Virtex UltraScale+ HBM FPGAs are the first Xilinx devices to offer the new, high-performance CCIX cache-coherent interface announced just last month. (See “CCIX Consortium develops Release1 of its fully cache-coherent interconnect specification, grows to 22 members.”) CCIX simplifies the design of offload accelerators for hyperscale data centers by providing low-latency, high-bandwidth, fully coherent access to server memory. The specification employs a subset of full coherency protocols and is ISA-agnostic, meaning that the specification’s protocols are independent of the attached processors’ architecture and instruction sets. CCIX pairs well with HBM and the new Xilinx UltraScale+ HBM FPGAs provide both in one package.

 

Here’s an 8-minute video with additional information about the new Virtex UltraScale+ HBM devices:

 

 

 

 

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