Home GPU Comparison ATI Mobility Radeon HD 3870 vs ATI Mobility Radeon HD 4670

ATI Mobility Radeon HD 3870 vs ATI Mobility Radeon HD 4670

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 512MB VRAM Mobility Radeon HD 4670 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages
Larger VRAM bandwidth (54.40GB/s vs 25.60GB/s)
ATI Mobility Radeon HD 4670 's Advantages
Released 7 months late
Lower TDP (35W vs 55W)

Score

Benchmark

FP32 (float)
Mobility Radeon HD 3870
0.422 TFLOPS
Mobility Radeon HD 4670 +2%
0.432 TFLOPS
VS

Graphics Card

Jun 2008
Release Date
Jan 2009
M8x
Generation
M9x
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
MXM-A (3.0)

Clock Speeds

-
-
-
-
-
-
850 MHz
Memory Clock
800 MHz

Memory

512MB
Memory Size
512MB
GDDR3
Memory Type
GDDR3
256bit
Memory Bus
128bit
54.40GB/s
Bandwidth
25.60GB/s

Render Config

4
Compute Units
4
-
-
-
320
Shading Units
320
16
TMUs
32
16
ROPs
8
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
128 KB
-
-
-

Theoretical Performance

10.56 GPixel/s
Pixel Rate
5.400 GPixel/s
10.56 GTexel/s
Texture Rate
21.60 GTexel/s
-
-
-
422.4 GFLOPS
FP32 (float)
432.0 GFLOPS
84.48 GFLOPS
FP64 (double)
-

Board Design

55W
TDP
35W
-
-
-
No outputs
Outputs
No outputs
-
-
-

Graphics Processor

M88
GPU Name
M96
-
GPU Variant
M96 XT (216-0729051)
TeraScale
Architecture
TeraScale
TSMC
Foundry
TSMC
55 nm
Process Size
55 nm
0.666 billion
Transistors
0.514 billion
192 mm²
Die Size
146 mm²

Graphics Features

10.1 (10_1)
DirectX
10.1 (10_1)
3.3
OpenGL
3.3
N/A
OpenCL
1.1
N/A
Vulkan
N/A
-
-
-
4.1
Shader Model
4.1

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