Feex·GPU
NVIDIA · GeForce GT 600 Series

NVIDIA GeForce GT 640 Rev. 2

The NVIDIA GeForce GT 640 Rev. 2 is a graphics card, built on the Kepler architecture using a 28 nm process. It has 384 shading units, 1 GB of GDDR5 memory on a 64-bit bus, 40.1 GB/s of memory bandwidth, a boost clock of 1.05 GHz and a 49 W board power rating.

KeplerGK208-400-A128 nm
7/10 key specs recorded · 12 facts

Depth: 12 recorded fields

Specification data last verified October 1, 2026 against Wikipedia and Wikipedia GPU list tables (wikigrid-2026-09). Coverage: 7 of 10 tracked specifications recorded.

WikipediaWikipedia GPU list tables (wikigrid-2026-09)
Shading units
384cores
Memory
1 GB
GDDR5 · 64-bit
Boost clock
n/a
1.05 GHz base
Board power
49 W

Graphics processor

Architecture Kepler
Codename GK208-400-A1
Chip Not recorded
Process node 28 nm
Transistors Not recorded
Die size Not recorded

The NVIDIA GeForce GT 640 Rev. 2 is based on the Kepler architecture, uses the GK208-400-A1 graphics processor and is manufactured on a 28 nm process.

Shader configuration

Shading units 384
Compute units Not recorded
Streaming multiprocessors Not recorded
Execution units Not recorded
Texture units (TMUs) 32
Render output units (ROPs) Not recorded
Ray tracing cores Not recorded
Tensor / AI cores Not recorded
XMX engines Not recorded
Infinity cache Not recorded

The NVIDIA GeForce GT 640 Rev. 2 has 384 shading units and 32 texture mapping units.

The NVIDIA GeForce GT 640 Rev. 2 does not use XMX engines; those are specific to Intel Arc graphics. Infinity Cache is an AMD architectural feature and does not apply to the NVIDIA GeForce GT 640 Rev. 2. Feex has no recorded ray tracing core count for the NVIDIA GeForce GT 640 Rev. 2.

Clock speeds

Base clock 1.05 GHz
Boost clock Not recorded
Game clock Not recorded
Memory clock Not recorded
Effective memory clock Not recorded

The NVIDIA GeForce GT 640 Rev. 2 runs at a base clock of 1.05 GHz.

Memory

Size 1 GB
Type GDDR5
Bus width 64-bit
Bandwidth 40.1 GB/s

The NVIDIA GeForce GT 640 Rev. 2 is equipped with 1 GB of GDDR5 memory, uses a 64-bit memory bus and delivers 40.1 GB/s of memory bandwidth.

Board and power

The NVIDIA GeForce GT 640 Rev. 2 has a board power rating of 49 W.

Board power (TDP) 49 W
Total board power Not recorded
Suggested PSU Not recorded
Power connectors Not recorded
Slot width Not recorded
Length Not recorded
Width Not recorded
Height Not recorded
Cooler Not recorded
Max temperature Not recorded
Bus interface Not recorded

Market

Launched Not recorded
Launch price Not recorded
Status Not recorded
Form factor Not recorded
Segment desktop
Series GeForce GT 600 Series

Frequently asked questions

How much VRAM does the NVIDIA GeForce GT 640 Rev. 2 have?

The NVIDIA GeForce GT 640 Rev. 2 has 1 GB of GDDR5 memory on a 64-bit bus. Its memory bandwidth is 40.1 GB/s.

How much power does the NVIDIA GeForce GT 640 Rev. 2 use and what power supply does it need?

The NVIDIA GeForce GT 640 Rev. 2 has a board power rating of 49 W.

Corrections to this record

After an audit, 1 empty field was filled from sources. Each change is listed with its old value, new value, rule and sources.

1 filled value

The audit log is public: all changes for this GPU, the corrections overview and the method.