Home GPU Comparison AMD Radeon HD 7970 GHz Edition vs AMD Radeon HD 6990

AMD Radeon HD 7970 GHz Edition vs AMD Radeon HD 6990

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 GHz Edition and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 GHz Edition 's Advantages
Released 1 years and 3 months late
Boost Clock1050MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 160.0GB/s)
512 additional rendering cores
Lower TDP (300W vs 375W)

Score

Benchmark

FP32 (float)
Radeon HD 7970 GHz Edition +68%
4.301 TFLOPS
Radeon HD 6990
2.55 TFLOPS
VS

Graphics Card

Jun 2012
Release Date
Mar 2011
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

1000 MHz
Base Clock
-
1050 MHz
Boost Clock
-
1500 MHz
Memory Clock
1250 MHz

Memory

3GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
256bit
288.0GB/s
Bandwidth
160.0GB/s

Render Config

32
Compute Units
24
-
-
-
2048
Shading Units
1536
128
TMUs
96
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

33.60 GPixel/s
Pixel Rate
26.56 GPixel/s
134.4 GTexel/s
Texture Rate
79.68 GTexel/s
-
-
-
4.301 TFLOPS
FP32 (float)
2.550 TFLOPS
1075 GFLOPS
FP64 (double)
637.4 GFLOPS

Board Design

300W
TDP
375W
700 W
Suggested PSU
750 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 4x mini-DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
2x 8-pin

Graphics Processor

Tahiti
GPU Name
Antilles
Tahiti XT2 (215-0821065)
GPU Variant
Antilles XT (215-0807027)
GCN 1.0
Architecture
TeraScale 3
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
2.64 billion
352 mm²
Die Size
389 mm²

Graphics Features

12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
5.1
Shader Model
5.0

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