Radeon HD 7970 X2 vs Radeon HD 6870 1600SP Edition
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 1024MB VRAM Radeon HD 6870 1600SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 7970 X2 's Advantages
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)
448 additional rendering cores
Radeon HD 6870 1600SP Edition 's Advantages
Lower TDP (175W vs 500W)
Score
Benchmark
FP32 (float)
Radeon HD 7970 X2
+39%
3789
Radeon HD 6870 1600SP Edition
2720
Graphics Card
Aug 2012
Release Date
Jan 2013
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1375 MHz
Memory Clock
1050 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
256bit
264.0GB/s
Bandwidth
134.4GB/s
Render Config
32
Compute Units
20
2048
Shading Units
1600
128
TMUs
80
32
ROPs
32
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
512 KB
Theoretical Performance
29.60 GPixel/s
Pixel Rate
27.20 GPixel/s
118.4 GTexel/s
Texture Rate
68.00 GTexel/s
3.789 TFLOPS
FP32 (float)
2.720 TFLOPS
947.2 GFLOPS
FP64 (double)
544.0 GFLOPS
Board Design
500W
TDP
175W
900 W
Suggested PSU
450 W
2x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1
3x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
New Zealand
GPU Name
Cypress
-
GPU Variant
Cypress XT
(215-0735033)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
2.154 billion
352 mm²
Die Size
334 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
