Radeon Vega 6 Mobile vs HD 4855

Primary details

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

Place in performance ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	TeraScale (2005−2013)	GCN 5.1 (2018−2021)
GPU code name	RV770	Cezanne
Market segment	Desktop	Laptop
Release date	3 January 2010 (14 years ago)	13 April 2021 (3 years ago)
Current price	no data	$696

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	640	384
Core clock speed	575 MHz	300 MHz
Boost clock speed	no data	1600 MHz
Number of transistors	956 million	9,800 million
Manufacturing process technology	55 nm	7 nm
Power consumption (TDP)	110 Watt	45 Watt
Texture fill rate	18.40	38.40
Floating-point performance	736.0 gflops	no data

Form factor & compatibility

Information on Radeon HD 4855 and Radeon Vega 6 Mobile compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Interface	PCIe 2.0 x16	IGP
Length	220 mm	no data
Width	2-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	GDDR5	System Shared
Maximum RAM amount	512 MB	System Shared
Memory bus width	256 Bit	System Shared
Memory clock speed	3600 MHz	System Shared
Memory bandwidth	115.2 GB/s	no data

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	1x DVI, 1x HDMI, 1x VGA	No outputs
HDMI	+	no data

API compatibility

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

DirectX	10.1 (10_1)	12 (12_1)
Shader Model	4.1	6.4
OpenGL	3.3	4.6
OpenCL	1.1	2.1
Vulkan	N/A	1.2

Pros & cons summary

---

Recency	3 January 2010	13 April 2021
Chip lithography	55 nm	7 nm
Power consumption (TDP)	110 Watt	45 Watt

---

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.

---