AMD Radeon HD 6790 vs AMD Radeon R9 285X

VS

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 3GB VRAM Radeon R9 285X 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 285X 's Advantages

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)

1248 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6790

1.344 TFLOPS

Radeon R9 285X +205%

4.104 TFLOPS

Radeon HD 6790

VS

Radeon R9 285X

Graphics Card

Apr 2011

Release Date

Unknown

Northern Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

1375 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

134.4GB/s

Bandwidth

264.0GB/s

Render Config

-

SM Count

-

10

Compute Units

32

800

Shading Units

2048

40

TMUs

128

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

Theoretical Performance

13.44 GPixel/s

Pixel Rate

32.06 GPixel/s

33.60 GTexel/s

Texture Rate

128.3 GTexel/s

-

FP16 (half)

-

1344 GFLOPS

FP32 (float)

4.104 TFLOPS

-

FP64 (double)

-

Graphics Processor

Barts

GPU Name

Tonga

Barts LE (215-0798002)

GPU Variant

Tonga XT (215-0851313)

TeraScale 2

Architecture

GCN 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

5 billion

255 mm²

Die Size

366 mm²

Board Design

150W

TDP

200W

450 W

Suggested PSU

550 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

11.2 (11_0)

DirectX

12 (12_0)

4.4

OpenGL

4.6

1.2

OpenCL

2.0

N/A

Vulkan

1.2

-

CUDA

-

5.0

Shader Model

6.3

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