AMD Radeon HD 6990 vs AMD Radeon R7 265X OEM

VS

AMD Radeon HD 6990

AMD Radeon R7 265X OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 2GB VRAM Radeon R7 265X OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6990 's Advantages

256 additional rendering cores

AMD Radeon R7 265X OEM 's Advantages

Released 3 years and 5 months late

Boost Clock925MHz

Larger VRAM bandwidth (179.2GB/s vs 160.0GB/s)

Lower TDP (150W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990 +7%

2.55 TFLOPS

Radeon R7 265X OEM

2.368 TFLOPS

Radeon HD 6990

VS

Radeon R7 265X OEM

Graphics Card

Mar 2011

Release Date

Aug 2014

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

925 MHz

1250 MHz

Memory Clock

1400 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

179.2GB/s

Render Config

24

Compute Units

20

-

1536

Shading Units

1280

96

TMUs

80

32

ROPs

32

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

29.60 GPixel/s

79.68 GTexel/s

Texture Rate

74.00 GTexel/s

-

2.550 TFLOPS

FP32 (float)

2.368 TFLOPS

637.4 GFLOPS

FP64 (double)

148.0 GFLOPS

Board Design

375W

TDP

150W

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

1x 6-pin

Graphics Processor

Antilles

GPU Name

Curacao

Antilles XT (215-0807027)

GPU Variant

Curacao PRO (215-0848000)

TeraScale 3

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.64 billion

Transistors

2.8 billion

389 mm²

Die Size

212 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

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