ATI Radeon HD 2900 XTX vs AMD Radeon HD 7850

VS

ATI Radeon HD 2900 XTX

AMD Radeon HD 7850

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 2GB VRAM Radeon HD 7850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7850 's Advantages

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (153.6GB/s vs 106.0GB/s)

704 additional rendering cores

Lower TDP (130W vs 240W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon HD 7850 +269%

1.761 TFLOPS

Radeon HD 2900 XTX

VS

Radeon HD 7850

Graphics Card

Unknown

Release Date

Mar 2012

Radeon R600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

828 MHz

Memory Clock

1200 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

256bit

106.0GB/s

Bandwidth

153.6GB/s

Render Config

4

Compute Units

16

-

320

Shading Units

1024

16

TMUs

64

16

ROPs

32

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

27.52 GPixel/s

11.89 GTexel/s

Texture Rate

55.04 GTexel/s

-

475.5 GFLOPS

FP32 (float)

1.761 TFLOPS

-

FP64 (double)

110.1 GFLOPS

Board Design

240W

TDP

130W

550 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

R600

GPU Name

Pitcairn

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Pitcairn PRO (215-0828062)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

80 nm

Process Size

28 nm

0.72 billion

Transistors

2.8 billion

420 mm²

Die Size

212 mm²

Graphics Features

10.0 (10_0)

DirectX

12 (11_1)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

1.2

N/A

Vulkan

1.2

-

4.0

Shader Model

5.1

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