GeForce GT 640M Mac Edition vs GTS 250

Place in the ranking	970	1094
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.06	no data
Power efficiency	0.72	2.27
Architecture	Tesla (2006−2010)	Kepler (2012−2018)
GPU code name	G92B	GK107
Market segment	Desktop	Laptop
Release date	4 March 2009 (15 years ago)	3 February 2013 (11 years ago)
Launch price (MSRP)	$199	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	128	384
Core clock speed	738 MHz	745 MHz
Number of transistors	754 million	1,270 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	150 Watt	32 Watt
Maximum GPU temperature	105 °C	no data
Texture fill rate	44.93	23.84
Floating-point processing power	0.3871 TFLOPS	0.5722 TFLOPS
ROPs	16	8
TMUs	64	32

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	229 mm	no data
Height	4.376" (111 mm) (11.1 cm)	no data
Width	2-slot	no data
Supplementary power connectors	1x 6-pin	no data
SLI options	+	-

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	GDDR3	GDDR5
Maximum RAM amount	1 GB	512 MB
Memory bus width	256 Bit	64 Bit
Memory clock speed	1100 MHz	1250 MHz
Memory bandwidth	70.4 GB/s	40 GB/s

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	Two Dual Link DVI	No outputs
Multi monitor support	+	no data
HDMI	+	-
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	S/PDIF	no data

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	11.1 (10_0)	12 (11_0)
Shader Model	4.0	5.1
OpenGL	3.0	4.6
OpenCL	1.1	1.2
Vulkan	N/A	1.1.126
CUDA	+	3.0

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	1.54	1.04
Recency	4 March 2009	3 February 2013
Maximum RAM amount	1 GB	512 MB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	150 Watt	32 Watt

GTS 250 has a 48.1% higher aggregate performance score, and a 100% higher maximum VRAM amount.

GT 640M Mac Edition, on the other hand, has an age advantage of 3 years, a 96.4% more advanced lithography process, and 368.8% lower power consumption.

The GeForce GTS 250 is our recommended choice as it beats the GeForce GT 640M Mac Edition in performance tests.

Be aware that GeForce GTS 250 is a desktop card while GeForce GT 640M Mac Edition is a notebook one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.