AMD Radeon HD 7750 & HD 7770 Launch Review



Product: AMD Radeon HD 7700 Series
Company: AMD
Author: James Prior
Editor: Charles Oliver
Date: February 14th, 2012

Introduction

AMD continues its 2012 Southern Islands tour with a visit to Cape Verde, the codename for their new AMD Radeon HD 7700 series. Valentine's Day marks the launch of two cards, the $159 Radeon HD 7770 and $109 Radeon HD 7750. If you're one of the 'forever alones' reading this at NDA lift, take solace in the fact that you're not alone - apparently AMD PR has nothing better to do than read tech websites tonight either. We'll try not to let the timing affect our Cape Verde evaluation, even if we should be playing 'hide the molerat' right now instead. Anyway, back the AMD Radeon HD 7770 GHz Edition and the AMD Radeon HD 7750:

AMD Radeon HD 7770 GHZ Edition
AMD Radeon HD 7750

AMD's Radeon HD 7700 series replace the ATI Radeon HD 5700 line up (codename Juniper, from the Evergreen series), which was rebranded as the HD 6700 series in 2011. AMD's performance gamer segment card line up has been unchanged since introduced in October 2009, as the 5700 to 6700 rebrand only added support for Blu-ray 3D and HDMI 1.4a. The HD 5750 was introduced at $109, but quickly settled at $129 and above, while the HD 5770 launched at $159 but pushed towards $199 quickly. In April 2011, the 6700 series, originally launched in January 2011 as an OEM only part, entered the consumer market. In the meantime, 5700 series prices had dropped and the new 6700 series pumped them up a bit again, bringing the 6750 close to the $100 mark and the 6770 to ~$130. As 2011 closed out, the AMD ATI Radeon HD 5770 was the most popular DirectX 11 GPU in the STEAM hardware survey.

AMD Radeon HD 7770 GHz Edition Specifications:

  • 28nm Cape Verde XT GPU using GCN
  • 1.5Bn transistors / 123mm2
  • 640 Stream Processors / 10 CU
  • 1GHz Engine Clock
  • 1125MHz (4.5Gbps) 1GB GDDR5 RAM
  • 128-bit Memory Bus
  • 72.0GB/s memory bandwidth
  • 40 Texture Units
  • 16 ROPS
  • DVI-DL + HDMI 1.4a (Fast HDMI supported) & 2 mini-DisplayPort 1.2 outputs
  • DirectX 11.1 / OpenCL 1.2 / OpenGL 4.2 / C++ AMP
  • <3W idle (ZeroCore Power) / 80W typ. board power (PowerTune limit 100W)
  • Single 6-pin PCIe power connector
  • $159USD SEP

AMD Radeon HD 7750 Specifications:

  • 28nm Cape Verde Pro GPU using GCN
  • 512 Stream Processors / 9 CU
  • 1.5Bn transistors / 123mm2
  • 800MHz Engine Clock
  • 1125MHz (4.5Gbps) 1GB GDDR5 RAM
  • 128-bit Memory Bus
  • 72.0GB/s memory bandwidth
  • 32 Texture Units
  • 16 ROPS
  • DVI-DL + HDMI 1.4a (Fast HDMI supported) & 1 DisplayPort 1.2 outputs
  • DirectX 11.1 / OpenCL 1.2 / OpenGL 4.2 / C++ AMP
  • <3W idle (ZeroCore Power) / 55W typ. board power (PowerTune limit 75W)
  • $109USD SEP

Three things jump out from this spec table: one is the low power requirement, two is the low board TDP, and three is the clock speeds. AMD is proud of shipping the AMD Radeon HD 7770 GHZ Edition with 1GHz engine clock, so much so that they are branding the card (and future products that ship with 1GHz or higher clocks) as GHZ Edition.

Southern Islands products: Q1 2012