Radeon HD 7870 GHz Edition vs Radeon HD 6870 1600SP Edition
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition 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 7870 GHz Edition 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)
Radeon HD 6870 1600SP Edition 's Advantages
Released 10 months late
320 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 7870 GHz Edition
2560
Radeon HD 6870 1600SP Edition
+6%
2720
Graphics Card
Mar 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
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
20
1280
Shading Units
1600
80
TMUs
80
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
27.20 GPixel/s
80.00 GTexel/s
Texture Rate
68.00 GTexel/s
2.560 TFLOPS
FP32 (float)
2.720 TFLOPS
160.0 GFLOPS
FP64 (double)
544.0 GFLOPS
Board Design
175W
TDP
175W
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
Cypress
Pitcairn XT
(215-0828047)
GPU Variant
Cypress XT
(215-0735033)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
2.8 billion
Transistors
2.154 billion
212 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
