GeForce GT 640M Mac Edition vs Radeon HD 6950

Place in the ranking	559	1094
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.04	no data
Power efficiency	2.36	2.27
Architecture	TeraScale 3 (2010−2013)	Kepler (2012−2018)
GPU code name	Cayman	GK107
Market segment	Desktop	Laptop
Design	reference	no data
Release date	14 December 2010 (13 years ago)	3 February 2013 (11 years ago)
Launch price (MSRP)	$299	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	1408	384
Core clock speed	no data	745 MHz
Boost clock speed	800 MHz	no data
Number of transistors	2,640 million	1,270 million
Manufacturing process technology	40 nm	28 nm
Power consumption (TDP)	500 Watt	32 Watt
Texture fill rate	70.40	23.84
Floating-point processing power	2.253 TFLOPS	0.5722 TFLOPS
ROPs	32	8
TMUs	88	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	PCIe 2.0 x16	no data
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	267 mm	no data
Width	2-slot	no data
Supplementary power connectors	2x 6-pin	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	GDDR5	GDDR5
Maximum RAM amount	2 GB	512 MB
Memory bus width	256 Bit	64 Bit
Memory clock speed	1250 MHz	1250 MHz
Memory bandwidth	no data	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	2x DVI, 1x HDMI, 2x mini-DisplayPort	No outputs
Eyefinity	+	-
HDMI	+	-

Supported technologies

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

CrossFire

API compatibility

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

DirectX	DirectX® 11	12 (11_0)
Shader Model	5.0	5.1
OpenGL	4.4	4.6
OpenCL	1.2	1.2
Vulkan	-	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	6.76	1.04
Recency	14 December 2010	3 February 2013
Maximum RAM amount	2 GB	512 MB
Chip lithography	40 nm	28 nm
Power consumption (TDP)	500 Watt	32 Watt

HD 6950 has a 550% higher aggregate performance score, and a 300% higher maximum VRAM amount.

GT 640M Mac Edition, on the other hand, has an age advantage of 2 years, a 42.9% more advanced lithography process, and 1462.5% lower power consumption.

The Radeon HD 6950 is our recommended choice as it beats the GeForce GT 640M Mac Edition in performance tests.

Be aware that Radeon HD 6950 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.