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AMD finally unveils Radeon RX Vega 64, Radeon RX Vega 56 (Page 3)

By Anthony Garreffa from Jul 30, 2017 @ 21:30 CDT

Radeon RX Vega 64

This is what we're here for: the new Radeon RX Vega 64, with 8GB of HBM2 and the next generation Vega NCU. AMD has crammed 4096 stream processors into the 14nm FinFET-based Vega 10 NCU, with 8GB of HBM2 that is capable of 484GB/sec, matching the 483.8GB/sec (virtually the same) as the GTX 1080 Ti (that uses GDDR5X and not HBM2).

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AMD cut the HBM2 bandwidth to 2048-bit, with earlier reports stating we'd see a 4096-bit memory bus mixed with HBM2 would've resulted in up to 1TB/sec memory bandwidth (double what RX Vega 64 is capable of). I'm hoping we see a refresh in the next 6-8 months, or earlier, that competes with GTX 1080 Ti - or beats it.

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AMD has managed a rather large 400MHz increase in GPU clocks over the Polaris architecture, a large achievement that saw AMD needing to redesign and re-architect the Vega NCU in order to push the additional 400MHz that sees the Radeon RX Vega 64 hitting 1.7GHz or more.

Rewinding back to Fiji which was capable of only 1GHz, and Polaris at around 1.3GHz, Vega's circuit design has been built for higher frequencies. The NCU physical layout is optimized with shorter wire lengths for performance critical paths, too.

AMD teamed up with the Zen CPU division on the custom SRAM, which was engineered to improve efficiency with 8% less delay, 18% savings in die area, and 43% less power consumption. There's also enhanced L2 cache and twice as much (4MB now) that reduces external bandwidth requirements.

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