AMD Radeon HD 6790 vs AMD Radeon R9 280

VS

AMD Radeon HD 6790

AMD Radeon R9 280

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 3GB VRAM Radeon R9 280 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 200W)

AMD Radeon R9 280 's Advantages

Released 2 years and 11 months late

Boost Clock933MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)

992 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6790

1.344 TFLOPS

Radeon R9 280 +148%

3.344 TFLOPS

Radeon HD 6790

VS

Radeon R9 280

Graphics Card

Apr 2011

Release Date

Mar 2014

Northern Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

827 MHz

-

Boost Clock

933 MHz

1050 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

134.4GB/s

Bandwidth

240.0GB/s

Render Config

10

Compute Units

28

-

800

Shading Units

1792

40

TMUs

112

16

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

29.86 GPixel/s

33.60 GTexel/s

Texture Rate

104.5 GTexel/s

-

1344 GFLOPS

FP32 (float)

3.344 TFLOPS

-

FP64 (double)

836.0 GFLOPS

Board Design

150W

TDP

200W

450 W

Suggested PSU

550 W

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

Outputs

1x DVI 2x HDMI 1.4a 1x DisplayPort 1.2

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Barts

GPU Name

Tahiti

Barts LE (215-0798002)

GPU Variant

Tahiti PRO3 (215-0821330)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

4.313 billion

255 mm²

Die Size

352 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

5.0

Shader Model

5.1

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