Home GPU Comparison ATI Mobility Radeon HD 4650 vs ATI Mobility Radeon HD 3870

ATI Mobility Radeon HD 4650 vs ATI Mobility Radeon HD 3870

ATI Mobility Radeon HD 4650
VS
ATI Mobility Radeon HD 3870
ATI Mobility Radeon HD 4650
ATI Mobility Radeon HD 3870
We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 4650 and 512MB VRAM Mobility Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 4650 's Advantages
Released 7 months late
Lower TDP (35W vs 55W)
ATI Mobility Radeon HD 3870 's Advantages
Larger VRAM bandwidth (54.40GB/s vs 19.20GB/s)

Score

Benchmark

FP32 (float)
Mobility Radeon HD 4650
0.32 TFLOPS
Mobility Radeon HD 3870 +31%
0.422 TFLOPS
VS

Graphics Card

Jan 2009
Release Date
Jun 2008
M9x
Generation
M8x
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
600 MHz
Memory Clock
850 MHz

Memory

512MB
Memory Size
512MB
DDR2
Memory Type
GDDR3
128bit
Memory Bus
256bit
19.20GB/s
Bandwidth
54.40GB/s

Render Config

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

Theoretical Performance

4.000 GPixel/s
Pixel Rate
10.56 GPixel/s
16.00 GTexel/s
Texture Rate
10.56 GTexel/s
-
-
-
320.0 GFLOPS
FP32 (float)
422.4 GFLOPS
-
FP64 (double)
84.48 GFLOPS

Board Design

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

Graphics Processor

M96
GPU Name
M88
-
-
-
TeraScale
Architecture
TeraScale
TSMC
Foundry
TSMC
55 nm
Process Size
55 nm
0.514 billion
Transistors
0.666 billion
146 mm²
Die Size
192 mm²

Graphics Features

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

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