Radeon HD 6490M Mac Edition vs GeForce 8400 GS PCI

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	Tesla 2.0 (2007−2013)	TeraScale 2 (2009−2015)
GPU code name	GT218	Seymour
Market segment	Desktop	Laptop
Release date	17 April 2007 (18 years ago)	2 May 2011 (14 years ago)

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	16	160
Core clock speed	520 MHz	750 MHz
Number of transistors	260 million	370 million
Manufacturing process technology	40 nm	40 nm
Power consumption (TDP)	40 Watt	no data
Texture fill rate	4.160	6.000
Floating-point processing power	0.03936 TFLOPS	0.24 TFLOPS
ROPs	4	4
TMUs	8	8
L1 Cache	no data	16 KB
L2 Cache	32 KB	128 KB

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	PCI	PCIe 2.0 x16
Length	170 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	GDDR5
Maximum RAM amount	512 MB	256 MB
Memory bus width	64 Bit	64 Bit
Memory clock speed	500 MHz	794 MHz
Memory bandwidth	8 GB/s	25.41 GB/s

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors	1x DVI, 1x HDMI, 1x VGA	No outputs
HDMI	+	-

API and SDK support

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

DirectX	11.1 (10_1)	11.2 (11_0)
Shader Model	4.1	5.0
OpenGL	3.3	4.4
OpenCL	1.1	1.2
Vulkan	N/A	N/A
CUDA	1.2	-

Pros & cons summary

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Recency	17 April 2007	2 May 2011
Maximum RAM amount	512 MB	256 MB