AMD Radeon HD 7870 XT vs AMD Radeon HD 6990

VS

AMD Radeon HD 7870 XT AMD Radeon HD 6990

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 XT and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 XT 's Advantages

Released 1 years and 8 months late

Boost Clock975MHz

Larger VRAM bandwidth (192.0GB/s vs 160.0GB/s)

Lower TDP (185W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 XT +17%

2.995 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon HD 7870 XT

VS

Radeon HD 6990

Graphics Card

Nov 2012

Release Date

Mar 2011

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

925 MHz

Base Clock

-

975 MHz

Boost Clock

-

1500 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

192.0GB/s

Bandwidth

160.0GB/s

Render Config

-

SM Count

-

24

Compute Units

24

1536

Shading Units

1536

96

TMUs

96

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

Theoretical Performance

31.20 GPixel/s

Pixel Rate

26.56 GPixel/s

93.60 GTexel/s

Texture Rate

79.68 GTexel/s

-

FP16 (half)

-

2.995 TFLOPS

FP32 (float)

2.550 TFLOPS

748.8 GFLOPS

FP64 (double)

637.4 GFLOPS

Graphics Processor

Tahiti

GPU Name

Antilles

Tahiti LE (215-0821122)

GPU Variant

Antilles XT (215-0807027)

GCN 1.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

2.64 billion

352 mm²

Die Size

389 mm²

Board Design

185W

TDP

375W

450 W

Suggested PSU

750 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

2x 8-pin

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

CUDA

-

5.1

Shader Model

5.0

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