AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 6870
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7870 GHz Edition 's Advantages
Released 1 years and 5 months late
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)
160 additional rendering cores
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 175W)
Score
Benchmark
FP32 (float)
Radeon HD 7870 GHz Edition
+26%
2.56 TFLOPS
Radeon HD 6870
2.016 TFLOPS
Graphics Card
Mar 2012
Release Date
Oct 2010
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
1200 MHz
Memory Clock
1050 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
153.6GB/s
Bandwidth
134.4GB/s
Render Config
20
Compute Units
14
-
-
-
1280
Shading Units
1120
80
TMUs
56
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
32.00 GPixel/s
Pixel Rate
28.80 GPixel/s
80.00 GTexel/s
Texture Rate
50.40 GTexel/s
-
-
-
2.560 TFLOPS
FP32 (float)
2.016 TFLOPS
160.0 GFLOPS
FP64 (double)
-
Board Design
175W
TDP
151W
450 W
Suggested PSU
450 W
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1
2x 6-pin
Power Connectors
2x 6-pin
Graphics Processor
Pitcairn
GPU Name
Barts
Pitcairn XT
(215-0828047)
GPU Variant
Barts XT
(215-0798000)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
2.8 billion
Transistors
1.7 billion
212 mm²
Die Size
255 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
