ATI Radeon HD 4850 vs AMD Radeon HD 6490

VS

ATI Radeon HD 4850

AMD Radeon HD 6490

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4850 and 1024MB VRAM Radeon HD 6490 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4850 's Advantages

Larger VRAM bandwidth (63.55GB/s vs 16.00GB/s)

480 additional rendering cores

AMD Radeon HD 6490 's Advantages

Released 3 years and 1 months late

More VRAM (1024GB vs 512GB)

Lower TDP (39W vs 110W)

Score

Benchmark

FP32 (float)

Radeon HD 4850 +184%

1 TFLOPS

Radeon HD 6490

0.352 TFLOPS

Radeon HD 4850

VS

Radeon HD 6490

Graphics Card

Jun 2008

Release Date

Jul 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

993 MHz

Memory Clock

500 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

DDR2

256bit

Memory Bus

128bit

63.55GB/s

Bandwidth

16.00GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

8

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

10.00 GPixel/s

Pixel Rate

4.400 GPixel/s

25.00 GTexel/s

Texture Rate

8.800 GTexel/s

-

1000 GFLOPS

FP32 (float)

352.0 GFLOPS

200.0 GFLOPS

FP64 (double)

-

Board Design

110W

TDP

39W

300 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Processor

RV770

GPU Name

Redwood

RV770 PRO (215-0669065)

GPU Variant

Redwood LE

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

0.627 billion

256 mm²

Die Size

104 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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