Radeon 780M vs R9 285X

Primary details

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

Place in the ranking	not rated	297
Place by popularity	not in top-100	47
Power efficiency	no data	84.58
Architecture	GCN 3.0 (2014−2019)	RDNA 3.0 (2022−2024)
GPU code name	Tonga	Phoenix
Market segment	Desktop	Desktop
Release date	no data (2024 years ago)	6 December 2023 (less than a year 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	2048	768
Core clock speed	1002 MHz	800 MHz
Boost clock speed	no data	2700 MHz
Number of transistors	5,000 million	25,390 million
Manufacturing process technology	28 nm	4 nm
Power consumption (TDP)	200 Watt	15 Watt
Texture fill rate	128.3	129.6
Floating-point processing power	4.104 TFLOPS	8.294 TFLOPS
ROPs	32	32
TMUs	128	48
Ray Tracing Cores	no data	12

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 3.0 x16	PCIe 4.0 x8
Length	267 mm	no data
Width	2-slot	IGP
Supplementary power connectors	1x 6-pin + 1x 8-pin	None

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	3 GB	System Shared
Memory bus width	384 Bit	System Shared
Memory clock speed	1375 MHz	System Shared
Memory bandwidth	264.0 GB/s	no data
Shared memory	-	+

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 HDMI 1.4a, 1x DisplayPort 1.2	Portable Device Dependent
HDMI	+	-

API compatibility

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

DirectX	12 (12_0)	12 Ultimate (12_2)
Shader Model	6.5	6.7
OpenGL	4.6	4.6
OpenCL	2.1	2.1
Vulkan	1.2.170	1.3

Pros & cons summary

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Chip lithography	28 nm	4 nm
Power consumption (TDP)	200 Watt	15 Watt

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