AMD Radeon HD 6850 vs AMD Radeon HD 7870 XT

VS

AMD Radeon HD 6850 AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6850 and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 's Advantages

Lower TDP (127W vs 185W)

AMD Radeon HD 7870 XT 's Advantages

Released 2 years and 1 months late

Boost Clock975MHz

More VRAM (2GB vs 1GB)

Larger VRAM bandwidth (192.0GB/s vs 128.0GB/s)

576 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6850

1.488 TFLOPS

Radeon HD 7870 XT +101%

2.995 TFLOPS

Radeon HD 6850

VS

Radeon HD 7870 XT

Graphics Card

Oct 2010

Release Date

Nov 2012

Northern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

925 MHz

-

Boost Clock

975 MHz

1000 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

128.0GB/s

Bandwidth

192.0GB/s

Render Config

-

SM Count

-

12

Compute Units

24

960

Shading Units

1536

48

TMUs

96

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

Theoretical Performance

24.80 GPixel/s

Pixel Rate

31.20 GPixel/s

37.20 GTexel/s

Texture Rate

93.60 GTexel/s

-

FP16 (half)

-

1488 GFLOPS

FP32 (float)

2.995 TFLOPS

-

FP64 (double)

748.8 GFLOPS

Graphics Processor

Barts

GPU Name

Tahiti

Barts PRO (215-0798006)

GPU Variant

Tahiti LE (215-0821122)

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

Board Design

127W

TDP

185W

300 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

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

-

CUDA

-

5.0

Shader Model

5.1

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