NVIDIA started GeForce GT 640 Rev. 2 sales 29 May 2013 at a recommended price of $89 . This is a Kepler 2.0 architecture desktop card based on 28 nm manufacturing process and primarily aimed at office use. 1 GB of GDDR5 memory clocked at 5.01 GHz are supplied, and together with 64 Bit memory interface this creates a bandwidth of 40.06 GB/s.

Compatibility-wise, this is single-slot card attached via PCIe 2.0 x8 interface. Its manufacturer default version has a length of 145 mm. No additional power connector is required, and power consumption is at 49 Watt.

Primary details

Some basic facts about GeForce GT 640 Rev. 2: architecture, market segment, release date etc.

Place in performance ranking	683
Place by popularity	not in top-100
Cost-effectiveness evaluation	0.18
Architecture	Kepler 2.0 (2013−2015)
GPU code name	GK208
Market segment	Desktop
Release date	29 May 2013 (10 years ago)
Launch price (MSRP)	$89
Current price	$230 (2.6x MSRP)	of 168889 (A100 PCIe 80 GB)

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

Detailed specifications

GeForce GT 640 Rev. 2's specs such as number of shaders, GPU base clock, manufacturing process, texturing and calculation speed. These parameters indirectly speak of GeForce GT 640 Rev. 2's performance, but for precise assessment you have to consider its benchmark and gaming test results.

Pipelines / CUDA cores	384	of 20480 (Data Center GPU Max NEXT)
Core clock speed	1046 MHz	of 2610 (Radeon RX 6500 XT)
Number of transistors	915 million	of 14400 (GeForce GTX 1080 SLI Mobile)
Manufacturing process technology	28 nm	of 4 (H100 PCIe)
Power consumption (TDP)	49 Watt	of 2400 (Data Center GPU Max Subsystem)
Texture fill rate	33.47	of 969.9 (H100 SXM5 96 GB)
Floating-point performance	803.3 gflops	of 16384 (Radeon Pro Duo)

Form factor & compatibility

This section provides details about the physical dimensions of GeForce GT 640 Rev. 2 and its compatibility with other computer components. This information is useful when selecting a computer configuration or upgrading an existing one. For desktop graphics cards, it includes details about the interface and bus (for motherboard compatibility) and additional power connectors (for power supply compatibility).

Interface	PCIe 2.0 x8
Length	145 mm
Width	1-slot
Supplementary power connectors	None

VRAM capacity and type

Parameters of memory installed on GeForce GT 640 Rev. 2: its type, size, bus, clock and resulting bandwidth. Note that GPUs integrated into processors have no dedicated memory and use a shared part of system RAM instead.

Memory type	GDDR5
Maximum RAM amount	1 GB	of 192 (Radeon Instinct MI300X)
Memory bus width	64 Bit	of 8192 (Radeon Instinct MI250X)
Memory clock speed	5008 MHz	of 23000 (GeForce RTX 4080 SUPER)
Memory bandwidth	40.06 GB/s	of 3276 (Aldebaran)

Connectivity and outputs

Types and number of video connectors present on GeForce GT 640 Rev. 2. As a rule, this section is relevant only for desktop reference graphics cards, since for notebook ones the availability of certain video outputs depends on the laptop model, while non-reference desktop models can (though not necessarily will) bear a different set of video ports.

Display Connectors	1x DVI, 1x HDMI, 1x VGA
HDMI	+

API compatibility

APIs supported by GeForce GT 640 Rev. 2, sometimes including their particular versions.

DirectX	12 (11_0)
Shader Model	5.1
OpenGL	4.6
OpenCL	1.2
Vulkan	1.1.126
CUDA	3.5

Benchmark performance

Synthetic benchmark performance of GeForce GT 640 Rev. 2. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GT 640 Rev. 2 3.52

We have no data on GeForce GT 640 Rev. 2 benchmark results.

Gaming performance

Let's see how good GeForce GT 640 Rev. 2 is for gaming. Particular gaming benchmark results are measured in frames per second. Comparisons with game system requirements are included, but remember that sometimes official requirements may reflect reality inaccurately.

Closest competitors

GeForce GT 640 Rev. 2's performance relative to its closest rivals among desktop graphics cards.

GeForce GTX 275 103.69

Radeon HD 4870 100.28

Radeon 540 100

GeForce GT 640 Rev. 2 100

FireStream 9270 98.3

GeForce GTS 450 97.16

Radeon HD 4870 X2 96.02

AMD equivalent

According to our data, the closest AMD alternative to GeForce GT 640 Rev. 2 is Radeon 540, which is nearly equal in speed and lower by 1 position in our ranking.