Home GPU Comparison AMD Radeon HD 6870M vs ATI Mobility Radeon HD 3850

AMD Radeon HD 6870M vs ATI Mobility Radeon HD 3850

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6870M and 512MB VRAM Mobility Radeon HD 3850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870M 's Advantages
Released 2 years and 7 months late
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (64.00GB/s vs 48.00GB/s)
480 additional rendering cores
ATI Mobility Radeon HD 3850 's Advantages
Lower TDP (35W vs 50W)

Score

Benchmark

FP32 (float)
Radeon HD 6870M +191%
1.08 TFLOPS
Mobility Radeon HD 3850
0.371 TFLOPS
VS

Graphics Card

Jan 2011
Release Date
Jun 2008
Vancouver
Generation
M8x
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
1000 MHz
Memory Clock
750 MHz

Memory

1024MB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
128bit
Memory Bus
256bit
64.00GB/s
Bandwidth
48.00GB/s

Render Config

10
Compute Units
4
-
-
-
800
Shading Units
320
40
TMUs
16
16
ROPs
16
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
-
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

10.80 GPixel/s
Pixel Rate
9.280 GPixel/s
27.00 GTexel/s
Texture Rate
9.280 GTexel/s
-
-
-
1080 GFLOPS
FP32 (float)
371.2 GFLOPS
-
FP64 (double)
74.24 GFLOPS

Board Design

50W
TDP
35W
-
-
-
No outputs
Outputs
No outputs
-
-
-

Graphics Processor

Granville
GPU Name
M88
Granville XT (216-0769024)
GPU Variant
-
TeraScale 2
Architecture
TeraScale
TSMC
Foundry
TSMC
40 nm
Process Size
55 nm
1.04 billion
Transistors
0.666 billion
166 mm²
Die Size
192 mm²

Graphics Features

11.2 (11_0)
DirectX
10.1 (10_1)
4.4
OpenGL
3.3
1.2
OpenCL
N/A
N/A
Vulkan
N/A
-
-
-
5.0
Shader Model
4.1

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