NVIDIA GeForce GT 640 vs AMD Radeon RX 6900 XTX

VS

NVIDIA GeForce GT 640

AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 16GB VRAM Radeon RX 6900 XTX 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 330W)

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (576.0GB/s vs 28.51GB/s)

4736 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon RX 6900 XTX +3497%

24.93 TFLOPS

GeForce GT 640

VS

Radeon RX 6900 XTX

Graphics Card

Jun 2012

Release Date

Unknown

GeForce 600

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

2075 MHz

-

Boost Clock

2435 MHz

891 MHz

Memory Clock

2250 MHz

Memory

2GB

Memory Size

16GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

576.0GB/s

Render Config

-

Compute Units

80

-

384

Shading Units

5120

32

TMUs

320

16

ROPs

128

-

RT Cores

80

16 KB (per SMX)

L1 Cache

128 KB per Array

256 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

7.216 GPixel/s

Pixel Rate

311.7 GPixel/s

28.86 GTexel/s

Texture Rate

779.2 GTexel/s

-

FP16 (half)

49.87 TFLOPS

692.7 GFLOPS

FP32 (float)

24.93 TFLOPS

28.86 GFLOPS

FP64 (double)

1.558 TFLOPS

Board Design

65W

TDP

330W

250 W

Suggested PSU

700 W

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

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

None

Power Connectors

2x 8-pin

Graphics Processor

GK107

GPU Name

Navi 21

GK107-300-A2

GPU Variant

Navi 21 XTXH (215-121000247)

Kepler

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

1.27 billion

Transistors

26.8 billion

118 mm²

Die Size

520 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.1

Vulkan

1.3

3.0

CUDA

-

5.1

Shader Model

6.5

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