ATI Mobility Radeon HD 4670 Mac Edition vs ATI Mobility HD 3850

Primary details

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

Place in the ranking	1237	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	1.50	no data
Architecture	TeraScale (2005−2013)	TeraScale (2005−2013)
GPU code name	M88	M96
Market segment	Laptop	Laptop
Release date	4 June 2008 (17 years ago)	16 September 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	320	320
Core clock speed	580 MHz	680 MHz
Number of transistors	666 million	514 million
Manufacturing process technology	55 nm	55 nm
Power consumption (TDP)	35 Watt	35 Watt
Texture fill rate	9.280	21.76
Floating-point processing power	0.3712 TFLOPS	0.4352 TFLOPS
ROPs	16	8
TMUs	16	32
L1 Cache	no data	64 KB
L2 Cache	256 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).

Laptop size	large	no data
Interface	PCIe 2.0 x16	MXM-A (3.0)

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	256 MB
Memory bus width	256 Bit	128 Bit
Memory clock speed	750 MHz	790 MHz
Memory bandwidth	48 GB/s	25.28 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	10.1 (10_1)	10.1 (10_1)
Shader Model	4.1	4.1
OpenGL	3.3	3.3
OpenCL	N/A	1.1
Vulkan	N/A	N/A

Pros & cons summary

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Recency	4 June 2008	16 September 2009
Maximum RAM amount	512 MB	256 MB