AMD Radeon HD 6870 X2 vs AMD Radeon R9 255 OEM

VS

AMD Radeon HD 6870 X2

AMD Radeon R9 255 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 2GB VRAM Radeon R9 255 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 73.60GB/s)

608 additional rendering cores

AMD Radeon R9 255 OEM 's Advantages

Released 2 years and 5 months late

Boost Clock930MHz

More VRAM (2GB vs 1024GB)

Lower TDP (65W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +111%

2.016 TFLOPS

Radeon R9 255 OEM

0.952 TFLOPS

Radeon HD 6870 X2

VS

Radeon R9 255 OEM

Graphics Card

Jul 2011

Release Date

Dec 2013

Northern Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

900 MHz

-

Boost Clock

930 MHz

1050 MHz

Memory Clock

1150 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

73.60GB/s

Render Config

14

Compute Units

8

-

1120

Shading Units

512

56

TMUs

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

14.88 GPixel/s

50.40 GTexel/s

Texture Rate

29.76 GTexel/s

-

2.016 TFLOPS

FP32 (float)

952.3 GFLOPS

-

FP64 (double)

59.52 GFLOPS

Board Design

300W

TDP

65W

700 W

Suggested PSU

250 W

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

Outputs

No outputs

-

Power Connectors

1x 6-pin

Graphics Processor

Barts

GPU Name

Cape Verde

Barts XT (215-0798000)

GPU Variant

Cape Verde PRX

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.7 billion

Transistors

1.5 billion

255 mm²

Die Size

123 mm²

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

-

5.0

Shader Model

5.1

Related GPU Comparisons

1

AMD Radeon HD 6870 X2 vs NVIDIA GeForce GTX 980 Ti

2

AMD Radeon HD 6870 X2 vs AMD Radeon RX 470D

3

AMD Radeon HD 6870 X2 vs NVIDIA GeForce RTX 2070

4

AMD Radeon HD 6870 X2 vs NVIDIA GeForce 6800

5

AMD Radeon HD 6870 X2 vs AMD Radeon R7 350

6

AMD Radeon HD 6870 X2 vs AMD Radeon Pro WX 8200

7

AMD Radeon HD 6870 X2 vs AMD Radeon HD 7750

8

AMD Radeon HD 6870 X2 vs NVIDIA GeForce GTX 275 PhysX Edition

9

AMD Radeon HD 6870 X2 vs NVIDIA GeForce 8400 GS PCI Rev. 2

10

AMD Radeon HD 6870 X2 vs ATI Radeon HD 2600 XT Mac Edition

Related News

1

NVIDIA Allegedly Equips RTX 5080 with 30Gbps Memory Speed, Other Models to Feature 28Gbps

2

Intel Reports High Return Rates for Devices Featuring Snapdragon X Series; Qualcomm Counters with 'Industry Standard' Claim

3

Intel Confirms Panther Lake Adopts 18A Process, ES0 Samples Already Sent to Customers

4

Complete Lineup of Core Ultra 200HX/H/U and Core 200H/U Revealed: 31 Models to Dazzle the Eyes

5

Amechi Unveils V1 Mini PC: Only 0.33L Volume with 150W Power Consumption

6

iPhone 17 Series Set for Major Design Overhaul: Camera Module Transformed into Sleek Strip

7

The Thinnest iPhone Ever! iPhone 17 Air Reportedly Enters Foxconn's NPI Stage

8

Apple Allegedly Cancels M4 Extreme, Originally Planned for Mac Pro with 64-Core CPU and 160-Core GPU

9

Cyberpunk 2077 Update 2.2: Intel Arrow Lake Gaming Performance Soars by 33%!

10

Intel Finally Achieves Frame Generation! 'F1 24' Becomes the First XeSS 2 Game