AMD Radeon HD 6870 1600SP Edition vs ATI Radeon HD 3850 AGP

VS

AMD Radeon HD 6870 1600SP Edition ATI Radeon HD 3850 AGP

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 1600SP Edition and 512MB VRAM Radeon HD 3850 AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 1600SP Edition 's Advantages

Released 5 years late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 52.99GB/s)

1280 additional rendering cores

ATI Radeon HD 3850 AGP 's Advantages

Lower TDP (75W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 1600SP Edition +535%

2.72 TFLOPS

Radeon HD 3850 AGP

0.428 TFLOPS

Radeon HD 6870 1600SP Edition

VS

Radeon HD 3850 AGP

Graphics Card

Jan 2013

Release Date

Jan 2008

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

AGP 8x

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

828 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

52.99GB/s

Render Config

-

SM Count

-

20

Compute Units

4

1600

Shading Units

320

80

TMUs

16

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

Theoretical Performance

27.20 GPixel/s

Pixel Rate

10.69 GPixel/s

68.00 GTexel/s

Texture Rate

10.69 GTexel/s

-

FP16 (half)

-

2.720 TFLOPS

FP32 (float)

427.5 GFLOPS

544.0 GFLOPS

FP64 (double)

85.50 GFLOPS

Graphics Processor

Cypress

GPU Name

RV670

Cypress XT (215-0735033)

GPU Variant

RV670 PRO (215-0708003)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

2.154 billion

Transistors

0.666 billion

334 mm²

Die Size

192 mm²

Board Design

175W

TDP

75W

450 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 8-pin

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

4.1

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