ATI Mobility Radeon HD 4850 Mac Edition vs GeForce Go 7900 GS

Primary details

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

Place in the ranking	1321	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	1.62	no data
Architecture	Curie (2003−2013)	TeraScale (2005−2013)
GPU code name	G71	M98
Market segment	Laptop	Laptop
Release date	18 April 2006 (19 years ago)	28 August 2009 (16 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	27	800
Core clock speed	375 MHz	503 MHz
Boost clock speed	375 MHz	no data
Number of transistors	278 million	956 million
Manufacturing process technology	90 nm	55 nm
Power consumption (TDP)	20 Watt	no data
Texture fill rate	7.500	20.12
Floating-point processing power	no data	0.8048 TFLOPS
ROPs	16	16
TMUs	20	40
L1 Cache	no data	160 KB
L2 Cache	no data	256 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).

Laptop size	large	no data
Interface	MXM-II	PCIe 2.0 x16

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	GDDR3
Maximum RAM amount	512 MB	512 MB
Memory bus width	256 Bit	256 Bit
Memory clock speed	500 MHz	850 MHz
Memory bandwidth	32 GB/s	54.4 GB/s
Shared memory	-	-

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

No outputs

No outputs

API and SDK support

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

DirectX	9.0c (9_3)	10.1 (10_1)
Shader Model	3.0	4.1
OpenGL	2.1	3.3
OpenCL	N/A	1.1
Vulkan	N/A	N/A

Pros & cons summary

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Recency	18 April 2006	28 August 2009
Chip lithography	90 nm	55 nm