ATI Radeon HD 4870 X2 vs AMD Radeon HD 6790

VS

ATI Radeon HD 4870 X2

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 1024MB VRAM Radeon HD 6790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6790 's Advantages

Released 2 years and 8 months late

Larger VRAM bandwidth (134.4GB/s vs 115.2GB/s)

Lower TDP (150W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon HD 6790 +12%

1.344 TFLOPS

Radeon HD 4870 X2

VS

Radeon HD 6790

Graphics Card

Aug 2008

Release Date

Apr 2011

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

900 MHz

Memory Clock

1050 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

134.4GB/s

Render Config

10

Compute Units

10

-

800

Shading Units

800

40

TMUs

40

16

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

13.44 GPixel/s

30.00 GTexel/s

Texture Rate

33.60 GTexel/s

-

1200 GFLOPS

FP32 (float)

1344 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

286W

TDP

150W

600 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

R700

GPU Name

Barts

R700 XT (215-0669045)

GPU Variant

Barts LE (215-0798002)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

1.7 billion

256 mm²

Die Size

255 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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