AMD Radeon HD 7970 GHz Edition Video Card Review
Product: AMD Radeon HD 7970 GHz Edition
Company: AMD
Author: James Prior
Editor: Charles Oliver
Date: June 21st, 2012
Specifications
AMD Radeon HD 7970 GHz Edition Specifications:
- 28nm Tahiti XT2 GPU using GCN
- 2048 Stream Processors / 32 Compute Units
- 4.3Bn transistors
- 1GHz Engine Clock / 1.05GHz Boost
- 1500MHz (6Gbps) 3GB GDDR5 RAM
- 384-bit Memory Bus
- 288GB/s memory bandwidth
- 128 Texture Units
- 32 ROPS
- 4.3TFLOPS SP / 1.08 TFLOPS DP
- DVI-DL + HDMI 1.4a (Fast HDMI supported) & 2 DisplayPort 1.2 outputs
- DirectX 11.1 / OpenCL 1.2 / OpenGL 4.2 / C++ AMP
- <3W idle (ZeroCore Power) / 250W typ. board power (PowerTune limit 300W)
- $499USD SEP
Our test platform is an detailed below:
Test Platform
| Component | Specification |
| Mainboard | ASUS P8P67 WS Revolution |
| Processor | Core i7-2600K [4.5GHz] |
| Graphics Card | AMD Radeon HD 7970 GHz Edition |
| AMD Radeon HD 7970 | |
| 2x4GB Crucial DDR3-1333 @ DDR3-1600 9-9-9-25 2T | |
| Audio | Realtek ALC892 |
| PSU | Corsair HX850 |
| Case | CoolerMaster HAF X w/Adt'l 200mm Top Exhaust |
| Storage Drives | Corsair F120 + Seagate 7200.12 1TB |
| Heatsink/Fan | Noctua NH-D14 |
| Display | 3x Dell P2210H |
| Operating System | Windows 7 64-bit Ultimate SP1 |
| Driver | Catalyst 12.7b |
Product Specification Comparison
| HD 7970 | HD 7970 GHz Edition | |
| SEP (USD) | $479 | $499 |
| Engine Clock | 925MHz | 1GHz / 1.05GHz Boost |
| Cores | 2048 | 2048 |
| Architecture | Tahiti GCN | Tahiti GCN |
| Memory Capacity | 3GB | 3GB |
| Memory Speed | 1375MHz / 5.5Gbps QDR | 1500MHz / 6Gbps QDR |
| Bus Width | 384-bit | 384-bit |
| Power [Idle/Avg Game/Limit] | <3W / 250W /300W | <3W / 250W /300W |
One of the first things we wanted to find out was 'can you CrossFireX a GHz Edition and a normal 7970?', so both went into the chassis and we installed the drivers. AMD is well known for their greater flexibility in multi-GPU supported configurations, but the combination of boost and non-boost might be stretching things. Rather to our surprise, we got the 'Enable CrossfireX' pop up, but then an error message - insufficient Crossfire connectors installed! So we upped from one to two, and voila! CrossFireX between GHz Edition and non-GHz Edition Radeon HD 7970s. Sweet.
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