NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon R9 390

VS

NVIDIA GeForce GT 640 OEM Rebrand

AMD Radeon R9 390

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 275W)

AMD Radeon R9 390 's Advantages

Released 3 years and 2 months late

More VRAM (8GB vs 1536GB)

Larger VRAM bandwidth (384.0GB/s vs 38.40GB/s)

2416 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon R9 390 +1133%

5.12 TFLOPS

GeForce GT 640 OEM Rebrand

VS

Radeon R9 390

Graphics Card

Apr 2012

Release Date

Jun 2015

GeForce 600

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1500 MHz

Memory

1536MB

Memory Size

8GB

DDR3

Memory Type

GDDR5

192bit

Memory Bus

512bit

38.40GB/s

Bandwidth

384.0GB/s

Render Config

-

Compute Units

40

3

SM Count

-

144

Shading Units

2560

24

TMUs

160

24

ROPs

64

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

1024 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

64.00 GPixel/s

17.28 GTexel/s

Texture Rate

160.0 GTexel/s

-

414.7 GFLOPS

FP32 (float)

5.120 TFLOPS

34.56 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

75W

TDP

275W

250 W

Suggested PSU

600 W

2x DVI 1x mini-HDMI 1.3a

Outputs

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

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GF116

GPU Name

Grenada

GF116-150-A1

GPU Variant

Grenada PRO (215-0880030)

Fermi 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.17 billion

Transistors

6.2 billion

238 mm²

Die Size

438 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.1

OpenCL

2.0

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

6.3

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