AMD Radeon HD 7870 XT vs AMD Radeon HD 8670 OEM

VS

AMD Radeon HD 7870 XT

AMD Radeon HD 8670 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 2GB VRAM Radeon HD 8670 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Larger VRAM bandwidth (192.0GB/s vs 73.60GB/s)

1152 additional rendering cores

AMD Radeon HD 8670 OEM 's Advantages

Boost Clock has increased by 8% (1050MHz vs 975MHz)

Lower TDP (75W vs 185W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +271%

2.995 TFLOPS

Radeon HD 8670 OEM

0.806 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 8670 OEM

Graphics Card

Nov 2012

Release Date

Jan 2013

Southern Islands

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

925 MHz

Base Clock

1000 MHz

975 MHz

Boost Clock

1050 MHz

1500 MHz

Memory Clock

1150 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

192.0GB/s

Bandwidth

73.60GB/s

Render Config

24

Compute Units

6

-

1536

Shading Units

384

96

TMUs

24

32

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

31.20 GPixel/s

Pixel Rate

8.400 GPixel/s

93.60 GTexel/s

Texture Rate

25.20 GTexel/s

-

2.995 TFLOPS

FP32 (float)

806.4 GFLOPS

748.8 GFLOPS

FP64 (double)

50.40 GFLOPS

Board Design

185W

TDP

75W

450 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

2x 6-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Oland

Tahiti LE (215-0821122)

GPU Variant

Oland XT (215-0837000)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

0.95 billion

352 mm²

Die Size

77 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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