NVIDIA GeForce GT 640 vs AMD Radeon RX 7700

VS

NVIDIA GeForce GT 640

AMD Radeon RX 7700

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 12GB VRAM Radeon RX 7700 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 200W)

AMD Radeon RX 7700 's Advantages

Boost Clock2600MHz

More VRAM (12GB vs 2GB)

Larger VRAM bandwidth (432.0GB/s vs 28.51GB/s)

2688 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon RX 7700 +4510%

31.95 TFLOPS

GeForce GT 640

VS

Radeon RX 7700

Graphics Card

Jun 2012

Release Date

Unknown

GeForce 600

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1900 MHz

-

Boost Clock

2600 MHz

891 MHz

Memory Clock

2250 MHz

Memory

2GB

Memory Size

12GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

192bit

28.51GB/s

Bandwidth

432.0GB/s

Render Config

-

Compute Units

48

-

384

Shading Units

3072

32

TMUs

192

16

ROPs

96

-

RT Cores

48

16 KB (per SMX)

L1 Cache

128 KB per Array

256 KB

L2 Cache

2 MB

-

L3 Cache

64 MB

Theoretical Performance

7.216 GPixel/s

Pixel Rate

249.6 GPixel/s

28.86 GTexel/s

Texture Rate

499.2 GTexel/s

-

FP16 (half)

63.90 TFLOPS

692.7 GFLOPS

FP32 (float)

31.95 TFLOPS

28.86 GFLOPS

FP64 (double)

998.4 GFLOPS

Board Design

65W

TDP

200W

250 W

Suggested PSU

550 W

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

Outputs

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

None

Power Connectors

1x 8-pin

Graphics Processor

GK107

GPU Name

Navi 32

GK107-300-A2

GPU Variant

Navi 32

Kepler

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

1.27 billion

Transistors

28.1 billion

118 mm²

Die Size

346 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

2.2

1.1

Vulkan

1.3

3.0

CUDA

-

5.1

Shader Model

6.7

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