GeForce GT 650M vs GT 640

Place in performance ranking	730	719
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.20	0.19
Architecture	Kepler (2012−2018)	Kepler (2012−2018)
GPU code name	GK107	N13E-GE
Market segment	Desktop	Laptop
Release date	5 June 2012 (11 years ago)	22 March 2012 (12 years ago)
Launch price (MSRP)	$99	no data
Current price	$157 (1.6x MSRP)	$679

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GT 640 has 5% better value for money than GT 650M.

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	384	384
CUDA cores	no data	384
Core clock speed	902 MHz	Up to 900 MHz
Boost clock speed	no data	900 MHz
Number of transistors	1,270 million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	65 Watt	45 Watt
Texture fill rate	28.86	Up to 27.2 billion/sec
Floating-point performance	692.7 gflops	652.8 gflops

Form factor & compatibility

Information on GeForce GT 640 and GeForce GT 650M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Laptop size	no data	medium sized
Bus support	no data	PCI Express 2.0, PCI Express 3.0
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	145 mm	no data
Width	1-slot	no data
Supplementary power connectors	None	no data

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	DDR3	DDR3\GDDR5
Maximum RAM amount	2 GB	2 GB
Memory bus width	128 Bit	128bit
Memory clock speed	1782 MHz	1800 - 4000 MHz
Memory bandwidth	28.51 GB/s	Up to 80.0 GB/s
Shared memory	no data	-

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	1x DVI, 1x HDMI, 1x DisplayPort	No outputs
HDMI	+	+
HDCP	no data	+
Maximum VGA resolution	no data	Up to 2048x1536

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	no data	+
Optimus	no data	+

API compatibility

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 API
Shader Model	5.1	5.1
OpenGL	4.6	4.5
OpenCL	1.2	1.1
Vulkan	1.1.126	1.1.126
CUDA	3.0	+

Synthetic benchmark performance

Non-gaming benchmark performance comparison. 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 3.04

GT 650M 3.11
+2.3%

GT 650M outperforms GT 640 by 2% based on our aggregated benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

Benchmark coverage: 25%

GT 640 1176

GT 650M 1205
+2.5%

GT 650M outperforms GT 640 by 2% in Passmark.

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

Benchmark coverage: 14%

GT 640 1560
+9.9%

GT 650M 1420

GT 640 outperforms GT 650M by 10% in 3DMark Fire Strike Graphics.

GeekBench 5 OpenCL

Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.

Benchmark coverage: 9%

GT 640 3757

GT 650M 3834
+2%

GT 650M outperforms GT 640 by 2% in GeekBench 5 OpenCL.

GeekBench 5 Vulkan

Benchmark coverage: 5%

GT 640 3841
+18.3%

GT 650M 3247

GT 640 outperforms GT 650M by 18% in GeekBench 5 Vulkan.

GeekBench 5 CUDA

Benchmark coverage: 4%

GT 640 2853
+7.6%

GT 650M 2651

GT 640 outperforms GT 650M by 8% in GeekBench 5 CUDA.

Octane Render OctaneBench

This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.

Benchmark coverage: 4%

GT 640 10

GT 650M 11
+10%

GT 650M outperforms GT 640 by 10% in Octane Render OctaneBench.