GeForce GT 640 Rev. 2 vs GTX 275

Place in the ranking	714	720
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.33	0.19
Power efficiency	1.14	5.04
Architecture	Tesla 2.0 (2007−2013)	Kepler 2.0 (2013−2015)
GPU code name	GT200B	GK208
Market segment	Desktop	Desktop
Release date	15 January 2009 (15 years ago)	29 May 2013 (11 years ago)
Launch price (MSRP)	$249	$89

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GTX 275 has 74% better value for money than GT 640 Rev. 2.

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	240	384
Core clock speed	633 MHz	1046 MHz
Number of transistors	1,400 million	915 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	219 Watt	49 Watt
Maximum GPU temperature	105 °C	no data
Texture fill rate	50.64	33.47
Floating-point processing power	0.6739 TFLOPS	0.8033 TFLOPS
ROPs	28	8
TMUs	80	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).

Bus support	PCI-E 2.0	no data
Interface	PCIe 2.0 x16	PCIe 2.0 x8
Length	267 mm	145 mm
Height	4.376" (111 mm) (11.1 cm)	no data
Width	2-slot	1-slot
Supplementary power connectors	2x 6-pin	None
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	896 MB	1 GB
Memory bus width	448 Bit	64 Bit
Memory clock speed	1134 MHz	1252 MHz
Memory bandwidth	127.0 GB/s	40.06 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	1x DVI, 1x HDMI, 1x VGA
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	+	3.5

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	3.59	3.55
Recency	15 January 2009	29 May 2013
Maximum RAM amount	896 MB	1 GB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	219 Watt	49 Watt

GTX 275 has a 1.1% higher aggregate performance score.

GT 640 Rev. 2, on the other hand, has an age advantage of 4 years, a 14.3% higher maximum VRAM amount, a 96.4% more advanced lithography process, and 346.9% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between GeForce GTX 275 and GeForce GT 640 Rev. 2.

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