NVIDIA · GeForce GT

NVIDIA GeForce GT 640M

The NVIDIA GeForce GT 640M is a graphics card released on March 22, 2012, built on the Kepler architecture. It has 2 GB of video memory on a 128-bit bus, a boost clock of 625 MHz and a 32 W board power rating. It scores 885 in the PassMark G3D benchmark. It supports DirectX 12, OpenGL 4.5 and Vulkan 1.2.

KeplerGK107 (N13P-GS)

6/10 key specs recorded · 23 facts

Depth: 31 recorded fields, 5 PassMark workloads

Specification data last verified October 1, 2026 against PassMark Videocard Benchmark and Wikipedia GPU list tables (wikigrid-2026-09). Coverage: 6 of 10 tracked specifications recorded.

PassMark Videocard Benchmark PassMark Videocard Benchmark Wikipedia GPU list tables (wikigrid-2026-09)

Shading units

n/a

Memory

2 GB

128-bit

Boost clock

n/a

625 MHz base

Board power

32 W

Performance

The NVIDIA GeForce GT 640M scores 885 in the PassMark G3D benchmark, higher than 51.8% of the 2,658 GPUs benchmarked (PassMark rank #1,462), measured across 1,075 submitted results. Its PassMark G2D score is 205.

PassMark G3D Mark

885

Rank #1,462
Faster than 51.8% of 2,658 GPUs
1,075 samples

0relative to the fastest GPU on record (41,928)

PassMark workload tests

DirectX 9 18 fps

reference: fastest recorded 526 fps · faster than 34.4% of 1,675 GPUs

DirectX 10 3 fps

reference: fastest recorded 231 fps · faster than 26.9% of 1,602 GPUs

DirectX 11 7 fps

reference: fastest recorded 362 fps · faster than 23.3% of 1,430 GPUs

DirectX 12 3 fps

reference: fastest recorded 213 fps · faster than 5.6% of 1,274 GPUs

GPU Compute 421 ops/s

reference: fastest recorded 26,591 ops/s · faster than 22.3% of 1,447 GPUs

Averages of PassMark PerformanceTest submissions; frames/sec are PassMark test-scene rates, not game FPS. Tests PassMark does not report for this card are omitted. PassMark listing

In the PassMark workload tests the NVIDIA GeForce GT 640M averages DirectX 9 18 fps, DirectX 10 3 fps, DirectX 11 7 fps, DirectX 12 3 fps and GPU Compute 421 ops/s, across 1,075 submitted results. Frames per second are PassMark test-scene rates, not game frame rates.

As stated by PassMark

Category Mobile

Bus interface PCIe 3.0 x16

Max memory 2 GB

Core clock 625 MHz

DirectX 11

OpenGL 4.5

Max TDP 32 W

First benchmarked 2012-10-13

Samples 1,075

PassMark listing (collected 2026-10-01)

PassMark's own listing for the NVIDIA GeForce GT 640M states the PCIe 3.0 x16 interface, up to 2 GB of memory, a core clock of 625 MHz, DirectX 11 and OpenGL 4.5, first benchmarked on 2012-10-13. These are PassMark's figures, shown separately from the specification tables above.

Not to be confused with

This page covers the NVIDIA GeForce GT 640M specifically. It is a different product from NVIDIA GeForce GT 640M LE, which have their own specifications. Check the exact model name before comparing figures.

Graphics processor

Architecture Kepler

Codename GK107 (N13P-GS)

Chip Not recorded

Process node Not recorded

Transistors Not recorded

Die size Not recorded

The NVIDIA GeForce GT 640M is based on the Kepler architecture and uses the GK107 (N13P-GS) graphics processor.

Clock speeds

Base clock 625 MHz

Boost clock Not recorded

Game clock Not recorded

Memory clock Not recorded

Effective memory clock Not recorded

The NVIDIA GeForce GT 640M runs at a base clock of 625 MHz.

Memory

Size 2 GB

Type Not recorded

Bus width 128-bit

Bandwidth Not recorded

The NVIDIA GeForce GT 640M is equipped with 2 GB of memory and uses a 128-bit memory bus.

Board and power

The NVIDIA GeForce GT 640M has a board power rating of 32 W and it connects over PCIe 3.0 x16.

Board power (TDP) 32 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 PCIe 3.0 x16

Market

Launched March 22, 2012

Launch price Not recorded

Status Not recorded

Form factor Not recorded

Segment Desktop

Series GeForce GT

The NVIDIA GeForce GT 640M was released on March 22, 2012.

Benchmarks

PassMark G3D 885

PassMark G2D 205

Rank #1,462

Samples 1,075

Graphics and compute APIs

The NVIDIA GeForce GT 640M supports DirectX 12, OpenGL 4.5 and Vulkan 1.2.

DirectX 12

OpenGL 4.5

Vulkan 1.2

Feex has no recorded CUDA compute capability for the NVIDIA GeForce GT 640M. Feex has no recorded OpenCL version for the NVIDIA GeForce GT 640M.

Naming and aliases

The NVIDIA GeForce GT 640M is also known by other names: PassMark also lists it as NVIDIA GeForce GT 640M (Mobile).

Other names (PassMark) NVIDIA GeForce GT 640M (Mobile)

Frequently asked questions

How much VRAM does the NVIDIA GeForce GT 640M have?

The NVIDIA GeForce GT 640M has 2 GB of video memory on a 128-bit bus.

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

The NVIDIA GeForce GT 640M has a board power rating of 32 W.

How fast is the NVIDIA GeForce GT 640M?

The NVIDIA GeForce GT 640M scores 885 in the PassMark G3D benchmark, higher than 51.8% of the 2,658 GPUs benchmarked. Its PassMark rank is #1,462. In the PassMark DirectX 12 test it averages 3 fps.

What bus interface does the NVIDIA GeForce GT 640M use?

The NVIDIA GeForce GT 640M connects over PCIe 3.0 x16.

When was the NVIDIA GeForce GT 640M released?

The NVIDIA GeForce GT 640M was released on March 22, 2012.

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

Architecture: Kepler (was Not recorded). Rule: Architecture from chip codename. chip GK107 -> Kepler. Sources: Wikipedia: List of Nvidia graphics processing units (revision 1377107724).

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