Mobility Radeon HD 3870 vs Radeon HD 6970M
We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 1024MB VRAM Radeon HD 6970M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Mobility Radeon HD 3870 's Advantages
Lower TDP (55W vs 75W)
Radeon HD 6970M 's Advantages
Released 2 years and 7 months late
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (115.2GB/s vs 54.40GB/s)
640 additional rendering cores
Score
Benchmark
FP32 (float)
Mobility Radeon HD 3870
422
Radeon HD 6970M
+209%
1306
Graphics Card
Jun 2008
Release Date
Jan 2011
M8x
Generation
Vancouver
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
MXM-B (3.0)
Clock Speeds
850 MHz
Memory Clock
900 MHz
Memory
512MB
Memory Size
1024MB
GDDR3
Memory Type
GDDR5
256bit
Memory Bus
256bit
54.40GB/s
Bandwidth
115.2GB/s
Render Config
4
Compute Units
12
320
Shading Units
960
16
TMUs
48
16
ROPs
32
-
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
512 KB
Theoretical Performance
10.56 GPixel/s
Pixel Rate
21.76 GPixel/s
10.56 GTexel/s
Texture Rate
32.64 GTexel/s
422.4 GFLOPS
FP32 (float)
1306 GFLOPS
84.48 GFLOPS
FP64 (double)
-
Board Design
55W
TDP
75W
No outputs
Outputs
No outputs
-
Power Connectors
None
Graphics Processor
M88
GPU Name
Blackcomb
-
GPU Variant
Blackcomb XT
(216-0811000)
TeraScale
Architecture
TeraScale 2
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.666 billion
Transistors
1.7 billion
192 mm²
Die Size
212 mm²
Graphics Features
10.1 (10_1)
DirectX
11.2 (11_0)
3.3
OpenGL
4.4
N/A
OpenCL
1.2
N/A
Vulkan
N/A
4.1
Shader Model
5.0
