ATI Radeon HD 4670 X2 vs NVIDIA GeForce GT 640

VS

ATI Radeon HD 4670 X2

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4670 X2 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 3 years and 9 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (28.51GB/s vs 22.40GB/s)

64 additional rendering cores

Lower TDP (65W vs 118W)

Score

Benchmark

FP32 (float)

Radeon HD 4670 X2

0.48 TFLOPS

GeForce GT 640 +44%

0.693 TFLOPS

Radeon HD 4670 X2

VS

GeForce GT 640

Graphics Card

Sep 2008

Release Date

Jun 2012

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

700 MHz

Memory Clock

891 MHz

Memory

512MB

Memory Size

2GB

GDDR3

Memory Type

DDR3

128bit

Memory Bus

128bit

22.40GB/s

Bandwidth

28.51GB/s

Render Config

4

Compute Units

-

320

Shading Units

384

32

TMUs

32

8

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

6.000 GPixel/s

Pixel Rate

7.216 GPixel/s

24.00 GTexel/s

Texture Rate

28.86 GTexel/s

-

480.0 GFLOPS

FP32 (float)

692.7 GFLOPS

-

FP64 (double)

28.86 GFLOPS

Board Design

118W

TDP

65W

300 W

Suggested PSU

250 W

4x DVI

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin

Power Connectors

None

Graphics Processor

RV730

GPU Name

GK107

RV730 XT (215-0719047)

GPU Variant

GK107-300-A2

TeraScale

Architecture

Kepler

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.514 billion

Transistors

1.27 billion

146 mm²

Die Size

118 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.0

4.1

Shader Model

5.1

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