ATI Radeon HD 3830 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

ATI Radeon HD 3830

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 256MB VRAM Radeon HD 3830 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3830 's Advantages

176 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 4 years late

More VRAM (1536GB vs 256GB)

Larger VRAM bandwidth (38.40GB/s vs 26.50GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 3830 +3%

0.428 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon HD 3830

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Apr 2008

Release Date

Apr 2012

Radeon R600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

828 MHz

Memory Clock

800 MHz

Memory

256MB

Memory Size

1536MB

GDDR3

Memory Type

DDR3

128bit

Memory Bus

192bit

26.50GB/s

Bandwidth

38.40GB/s

Render Config

4

Compute Units

-

SM Count

3

320

Shading Units

144

16

TMUs

24

16

ROPs

24

-

L1 Cache

64 KB (per SM)

128 KB

L2 Cache

384 KB

-

Theoretical Performance

10.69 GPixel/s

Pixel Rate

4.320 GPixel/s

10.69 GTexel/s

Texture Rate

17.28 GTexel/s

-

427.5 GFLOPS

FP32 (float)

414.7 GFLOPS

85.50 GFLOPS

FP64 (double)

34.56 GFLOPS

Board Design

75W

TDP

75W

250 W

Suggested PSU

250 W

No outputs

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin

Power Connectors

None

Graphics Processor

RV670

GPU Name

GF116

RV670 PRO (215-0708003)

GPU Variant

GF116-150-A1

TeraScale

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

1.17 billion

192 mm²

Die Size

238 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

2.1

4.1

Shader Model

5.1

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