ATI Radeon HD 4650 vs ATI Radeon HD 3870 X2

VS

ATI Radeon HD 4650 ATI Radeon HD 3870 X2

We compared two Desktop platform GPUs: 256MB VRAM Radeon HD 4650 and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4650 's Advantages

Released 8 months late

Lower TDP (48W vs 165W)

ATI Radeon HD 3870 X2 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (57.66GB/s vs 22.40GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 4650

0.384 TFLOPS

Radeon HD 3870 X2 +37%

0.528 TFLOPS

Radeon HD 4650

VS

Radeon HD 3870 X2

Graphics Card

Sep 2008

Release Date

Jan 2008

Radeon R700

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

700 MHz

Memory Clock

901 MHz

Memory

256MB

Memory Size

512MB

GDDR3

Memory Type

GDDR3

128bit

Memory Bus

256bit

22.40GB/s

Bandwidth

57.66GB/s

Render Config

-

SM Count

-

4

Compute Units

4

320

Shading Units

320

32

TMUs

16

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

-

128 KB

L2 Cache

256 KB

Theoretical Performance

4.800 GPixel/s

Pixel Rate

13.20 GPixel/s

19.20 GTexel/s

Texture Rate

13.20 GTexel/s

-

FP16 (half)

-

384.0 GFLOPS

FP32 (float)

528.0 GFLOPS

-

FP64 (double)

105.6 GFLOPS

Graphics Processor

RV730

GPU Name

R680

RV730 PRO (215-0719056)

GPU Variant

R680 XT (215-0708017)

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

Board Design

48W

TDP

165W

200 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

-

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3 (full) 4.0 (partial)

1.1

OpenCL

N/A

Vulkan

N/A

-

CUDA

-

4.1

Shader Model

4.1

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