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Detailed HD 7770 specifications compiled



/ 5 years ago

AMD’s HD 7770 is due out in the near future, probably within the next week and its going to be targeting the sub $200 market with a new boost of performance using the 28nm architecture. “The latest specifications exposé reveals AMD’s new design strategy: Instead of increasing components such as stream processors and ROPs, which would increase transistor counts, and unnecessarily increase power draw, AMD is counting on a lesser number of better-configured Graphics CoreNext stream processors. While the previous-generation HD 5770/6770 “Juniper” GPU featured VLIW5 stream processors, the new “Cape Verde” GPU, which will go into making up Radeon HD 7770 and 7750, will feature GCN stream processors. Apart from architectural performance improvements, AMD is counting on increased clock speeds to do the trick. The specifications are listed below.”

Cape Verde Physical

  • Built on TSMC 28 nm process, ~1.5 billion transistors
  • 10 Graphics CoreNext Compute Units (CUs)
  • 640 stream processors
  • 40 TMUs, 16 ROPs
  • 128-bit wide GDDR5 memory interface

Radeon HD 7770

  • All CUs enabled, 640 stream processors
  • 1 GB GDDR5 memory
  • 40 TMUs, 16 ROPs
  • 1000 MHz core clock-speed
  • 1125 MHz (actual), 4500 MHz (effective) memory clock-speed
  • 72 GB/s memory bandwidth
  • 1280 GFLOP/s single-precision floating-point performance
  • Typical board power: 80W

Radeon HD 7750

  • 8 CUs enabled, 512 stream processors
  • 1 GB GDDR5 memory
  • 32 TMUs, 16 ROPs
  • 800 MHz core clock-speed
  • 1125 MHz (actual), 4500 MHz (effective) memory clock-speed
  • 72 GB/s memory bandwidth
  • 819 GFLOP/s single-precision floating-point performance
  • Typical board power: 55W

Source: 3DCenter.org, TPU