AMD Radeon HD 7870 XT vs ATI Radeon HD 3850 X3

VS

AMD Radeon HD 7870 XT

ATI Radeon HD 3850 X3

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 512MB VRAM Radeon HD 3850 X3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Boost Clock975MHz

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (192.0GB/s vs 54.40GB/s)

1216 additional rendering cores

ATI Radeon HD 3850 X3 's Advantages

Lower TDP (145W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +599%

2.995 TFLOPS

Radeon HD 3850 X3

0.428 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 3850 X3

Graphics Card

Nov 2012

Release Date

Unknown

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

192.0GB/s

Bandwidth

54.40GB/s

Render Config

24

Compute Units

4

-

1536

Shading Units

320

96

TMUs

16

32

ROPs

16

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

256 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

10.70 GPixel/s

93.60 GTexel/s

Texture Rate

10.70 GTexel/s

-

2.995 TFLOPS

FP32 (float)

428.2 GFLOPS

748.8 GFLOPS

FP64 (double)

-

Board Design

185W

TDP

145W

450 W

Suggested PSU

300 W

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

Outputs

4x DVI

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Tahiti

GPU Name

RV670

Tahiti LE (215-0821122)

GPU Variant

RV670 PRO (215-0708003)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.666 billion

352 mm²

Die Size

192 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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