AMD Radeon HD 6870 X2 vs NVIDIA GeForce GTX 555 OEM

VS

AMD Radeon HD 6870 X2

NVIDIA GeForce GTX 555 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 1024MB VRAM GeForce GTX 555 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 91.87GB/s)

832 additional rendering cores

NVIDIA GeForce GTX 555 OEM 's Advantages

Lower TDP (150W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +137%

2.016 TFLOPS

GeForce GTX 555 OEM

0.848 TFLOPS

Radeon HD 6870 X2

VS

GeForce GTX 555 OEM

Graphics Card

Jul 2011

Release Date

May 2011

Northern Islands

Generation

GeForce 500

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

957 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

192bit

134.4GB/s

Bandwidth

91.87GB/s

Render Config

14

Compute Units

-

SM Count

6

1120

Shading Units

288

56

TMUs

48

32

ROPs

24

-

8 KB (per CU)

L1 Cache

64 KB (per SM)

512 KB

L2 Cache

384 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

8.832 GPixel/s

50.40 GTexel/s

Texture Rate

35.33 GTexel/s

-

2.016 TFLOPS

FP32 (float)

847.9 GFLOPS

-

FP64 (double)

70.66 GFLOPS

Board Design

300W

TDP

150W

700 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

-

Power Connectors

2x 6-pin

Graphics Processor

Barts

GPU Name

GF114

Barts XT (215-0798000)

GPU Variant

GF114-200-KB-A1

TeraScale 2

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

1.95 billion

255 mm²

Die Size

332 mm²

Graphics Features

11.2 (11_0)

DirectX

12 (11_0)

4.4

OpenGL

4.6

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

5.0

Shader Model

5.1

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