AMD Radeon HD 8990 OEM vs ATI Radeon HD 4850 X2

VS

AMD Radeon HD 8990 OEM

ATI Radeon HD 4850 X2

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8990 OEM and 512MB VRAM Radeon HD 4850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8990 OEM 's Advantages

Released 4 years and 5 months late

Boost Clock1000MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (288.0GB/s vs 63.68GB/s)

1248 additional rendering cores

ATI Radeon HD 4850 X2 's Advantages

Lower TDP (250W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 8990 OEM +309%

4.096 TFLOPS

Radeon HD 4850 X2

1 TFLOPS

Radeon HD 8990 OEM

VS

Radeon HD 4850 X2

Graphics Card

Apr 2013

Release Date

Nov 2008

Sea Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

995 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

63.68GB/s

Render Config

32

Compute Units

10

-

2048

Shading Units

800

128

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

10.00 GPixel/s

128.0 GTexel/s

Texture Rate

25.00 GTexel/s

-

4.096 TFLOPS

FP32 (float)

1000 GFLOPS

1024 GFLOPS

FP64 (double)

200.0 GFLOPS

Board Design

375W

TDP

250W

750 W

Suggested PSU

600 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

4x DVI 1x S-Video

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Malta

GPU Name

R700

Malta XT (215-0849026)

GPU Variant

R700 PRO (215-0669065)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.956 billion

365 mm²

Die Size

256 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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