GeForce GT 640M Mac Edition vs ATI Radeon HD 3850

Place in the ranking	1104	1097
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.04	no data
Power efficiency	0.93	2.23
Architecture	TeraScale (2005−2013)	Kepler (2012−2018)
GPU code name	RV670	GK107
Market segment	Desktop	Laptop
Release date	19 November 2007 (17 years ago)	3 February 2013 (11 years ago)
Launch price (MSRP)	$179	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	320	384
Core clock speed	668 MHz	745 MHz
Number of transistors	666 million	1,270 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	75 Watt	32 Watt
Texture fill rate	10.69	23.84
Floating-point processing power	0.4275 TFLOPS	0.5722 TFLOPS
ROPs	16	8
TMUs	16	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	208 mm	no data
Width	1-slot	no data
Supplementary power connectors	1x 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	GDDR3	GDDR5
Maximum RAM amount	1 GB	512 MB
Memory bus width	256 Bit	64 Bit
Memory clock speed	830 MHz	1250 MHz
Memory bandwidth	53.12 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

2x DVI, 1x S-Video

No outputs

API compatibility

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

DirectX	10.1 (10_1)	12 (11_0)
Shader Model	4.1	5.1
OpenGL	3.3	4.6
OpenCL	N/A	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	1.02	1.04
Recency	19 November 2007	3 February 2013
Maximum RAM amount	1 GB	512 MB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	75 Watt	32 Watt

ATI HD 3850 has a 100% higher maximum VRAM amount.

GT 640M Mac Edition, on the other hand, has a 2% higher aggregate performance score, an age advantage of 5 years, a 96.4% more advanced lithography process, and 134.4% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Radeon HD 3850 and GeForce GT 640M Mac Edition.

Be aware that Radeon HD 3850 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.