ATI Radeon HD 2900 XTX vs NVIDIA GeForce GT 640 Rev. 2

VS

ATI Radeon HD 2900 XTX

NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages

Larger VRAM bandwidth (106.0GB/s vs 40.06GB/s)

NVIDIA GeForce GT 640 Rev. 2 's Advantages

More VRAM (1024GB vs 512GB)

64 additional rendering cores

Lower TDP (49W vs 240W)

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

GeForce GT 640 Rev. 2 +68%

0.803 TFLOPS

Radeon HD 2900 XTX

VS

GeForce GT 640 Rev. 2

Graphics Card

Unknown

Release Date

May 2013

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

-

828 MHz

Memory Clock

1252 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

512bit

Memory Bus

64bit

106.0GB/s

Bandwidth

40.06GB/s

Render Config

4

Compute Units

-

320

Shading Units

384

16

TMUs

32

16

ROPs

8

-

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

11.89 GPixel/s

Pixel Rate

8.368 GPixel/s

11.89 GTexel/s

Texture Rate

33.47 GTexel/s

-

475.5 GFLOPS

FP32 (float)

803.3 GFLOPS

-

FP64 (double)

33.47 GFLOPS

Board Design

240W

TDP

49W

550 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

2x 6-pin

Power Connectors

None

Graphics Processor

R600

GPU Name

GK208

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

GK208-400-A1

TeraScale

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

80 nm

Process Size

28 nm

0.72 billion

Transistors

1.02 billion

420 mm²

Die Size

87 mm²

Graphics Features

10.0 (10_0)

DirectX

12 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.5

4.0

Shader Model

5.1

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