AMD Radeon HD 6390 vs AMD Radeon HD 7850

VS

AMD Radeon HD 6390

AMD Radeon HD 7850

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 and 2GB VRAM Radeon HD 7850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6390 's Advantages

Lower TDP (39W vs 130W)

AMD Radeon HD 7850 's Advantages

Released 8 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (153.6GB/s vs 16.00GB/s)

704 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6390

0.352 TFLOPS

Radeon HD 7850 +400%

1.761 TFLOPS

Radeon HD 6390

VS

Radeon HD 7850

Graphics Card

Jul 2011

Release Date

Mar 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1200 MHz

Memory

1024MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

153.6GB/s

Render Config

4

Compute Units

16

-

320

Shading Units

1024

16

TMUs

64

8

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

27.52 GPixel/s

8.800 GTexel/s

Texture Rate

55.04 GTexel/s

-

352.0 GFLOPS

FP32 (float)

1.761 TFLOPS

-

FP64 (double)

110.1 GFLOPS

Board Design

39W

TDP

130W

200 W

Suggested PSU

300 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Processor

Redwood

GPU Name

Pitcairn

Redwood LE

GPU Variant

Pitcairn PRO (215-0828062)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.627 billion

Transistors

2.8 billion

104 mm²

Die Size

212 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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