AMD Radeon HD 8990 OEM vs AMD Radeon R9 270X

VS

AMD Radeon HD 8990 OEM

AMD Radeon R9 270X

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8990 OEM and 2GB VRAM Radeon R9 270X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8990 OEM 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 179.2GB/s)

768 additional rendering cores

AMD Radeon R9 270X 's Advantages

Released 6 months late

Boost Clock has increased by 5% (1050MHz vs 1000MHz)

Lower TDP (180W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 8990 OEM +52%

4.096 TFLOPS

Radeon R9 270X

2.688 TFLOPS

Radeon HD 8990 OEM

VS

Radeon R9 270X

Graphics Card

Apr 2013

Release Date

Oct 2013

Sea Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

1000 MHz

Boost Clock

1050 MHz

1500 MHz

Memory Clock

1400 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

179.2GB/s

Render Config

32

Compute Units

20

-

2048

Shading Units

1280

128

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

33.60 GPixel/s

128.0 GTexel/s

Texture Rate

84.00 GTexel/s

-

4.096 TFLOPS

FP32 (float)

2.688 TFLOPS

1024 GFLOPS

FP64 (double)

168.0 GFLOPS

Board Design

375W

TDP

180W

750 W

Suggested PSU

450 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Malta

GPU Name

Curacao

Malta XT (215-0849026)

GPU Variant

Curacao XT (215-0848004)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.8 billion

365 mm²

Die Size

212 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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