Radeon RX 6400 vs GeForce GTX 780 Rev. 2

Place in the ranking	427	276
Place by popularity	not in top-100	100
Cost-effectiveness evaluation	1.25	53.33
Power efficiency	2.98	25.69
Architecture	Kepler (2012−2018)	RDNA 2.0 (2020−2024)
GPU code name	GK110B	Navi 24
Market segment	Desktop	Desktop
Release date	10 September 2013 (11 years ago)	19 January 2022 (2 years ago)
Launch price (MSRP)	$649	$159

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

RX 6400 has 4166% better value for money than GTX 780 Rev. 2.

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	2304	768
Core clock speed	863 MHz	1923 MHz
Boost clock speed	902 MHz	2321 MHz
Number of transistors	7,080 million	5,400 million
Manufacturing process technology	28 nm	6 nm
Power consumption (TDP)	250 Watt	53 Watt
Texture fill rate	173.2	111.4
Floating-point processing power	4.156 TFLOPS	3.565 TFLOPS
ROPs	48	32
TMUs	192	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 x4
Length	267 mm	no data
Width	2-slot	1-slot
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	GDDR6
Maximum RAM amount	3 GB	4 GB
Memory bus width	384 Bit	64 Bit
Memory clock speed	1502 MHz	2000 MHz
Memory bandwidth	288.4 GB/s	128.0 GB/s

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, 1x DisplayPort	1x HDMI 2.1, 1x DisplayPort 1.4a
HDMI	+	+

API compatibility

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

DirectX	12 (11_1)	12 Ultimate (12_2)
Shader Model	5.1	6.7
OpenGL	4.6	4.6
OpenCL	1.2	2.2
Vulkan	1.1.126	1.3
CUDA	3.5	-

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	10.78	19.70
Recency	10 September 2013	19 January 2022
Maximum RAM amount	3 GB	4 GB
Chip lithography	28 nm	6 nm
Power consumption (TDP)	250 Watt	53 Watt

RX 6400 has a 82.7% higher aggregate performance score, an age advantage of 8 years, a 33.3% higher maximum VRAM amount, a 366.7% more advanced lithography process, and 371.7% lower power consumption.

The Radeon RX 6400 is our recommended choice as it beats the GeForce GTX 780 Rev. 2 in performance tests.

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