Radeon RX 640 vs Quadro K420

Place in performance ranking	864	592
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.08	12.59
Architecture	Kepler (2012−2018)	Polaris (2016−2019)
GPU code name	GK107	Polaris 12
Market segment	Workstation	Laptop
Release date	22 July 2014 (9 years ago)	12 August 2019 (4 years ago)
Launch price (MSRP)	$96.67	no data
Current price	$402 (4.2x MSRP)	$193

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

RX 640 has 15638% better value for money than Quadro K420.

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	192	640
Core clock speed	876 MHz	1218 MHz
Boost clock speed	no data	1218 MHz
Number of transistors	1,270 million	2,200 million
Manufacturing process technology	28 nm	14 nm
Power consumption (TDP)	41 Watt	50 Watt
Texture fill rate	14.02	38.98
Floating-point performance	336.4 gflops	no data

Form factor & compatibility

Information on Quadro K420 and Radeon RX 640 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.

Laptop size	no data	large
Interface	PCIe 2.0 x16	PCIe 3.0 x8
Length	160 mm	no data
Width	1" (2.5 cm)	no data
Supplementary power connectors	None	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	128 Bit	GDDR5
Maximum RAM amount	1 GB/2 GB	4 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	1782 MHz	6000 MHz
Memory bandwidth	Up to 29 GB/s	112.0 GB/s
Shared memory	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	DVI-I DP	1x DVI, 1x HDMI, 1x DisplayPort
Number of simultaneous displays	4	no data
HDMI	no data	+

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

FreeSync	no data	+
3D Vision Pro	+	no data
Mosaic	+	no data
nView Desktop Management	+	no data

API compatibility

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

DirectX	12	12 (12_0)
Shader Model	5	6.4
OpenGL	4.5	4.6
OpenCL	1.2	2.0
Vulkan	+	1.2.131
CUDA	3.0	no data

Synthetic benchmark performance

Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Quadro K420 1.93

RX 640 5.08
+163%

Radeon RX 640 outperforms Quadro K420 by 163% based on our aggregate benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

Benchmark coverage: 25%

Quadro K420 745

RX 640 1961
+163%

Radeon RX 640 outperforms Quadro K420 by 163% in Passmark.

Gaming performance

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

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

10−12

−180%

28
+180%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

8−9
−163%

21−24

+163%

Full HD
Medium Preset

Assassin's Creed Odyssey	20 −150%	50−55 +150%
Assassin's Creed Valhalla	4−5 −150%	10−11 +150%
Battlefield 5	12−14 −131%	30−33 +131%
Call of Duty: Modern Warfare	10−12 −145%	27−30 +145%
Cyberpunk 2077	8−9 −163%	21−24 +163%
Far Cry 5	10−12 −145%	27−30 +145%
Far Cry New Dawn	14−16 −150%	35−40 +150%
Forza Horizon 4	24−27 −150%	60−65 +150%
Hitman 3	10−11 −140%	24−27 +140%
Horizon Zero Dawn	24−27 −150%	65−70 +150%
Metro Exodus	27 −159%	70−75 +159%
Red Dead Redemption 2	26 −150%	65−70 +150%
Shadow of the Tomb Raider	16−18 −135%	40−45 +135%
Watch Dogs: Legion	21−24 −150%	55−60 +150%

Full HD
High Preset

Assassin's Creed Odyssey	10−11 −140%	24−27 +140%
Assassin's Creed Valhalla	4−5 −150%	10−11 +150%
Battlefield 5	12−14 −131%	30−33 +131%
Call of Duty: Modern Warfare	10−12 −145%	27−30 +145%
Cyberpunk 2077	8−9 −163%	21−24 +163%
Far Cry 5	10−12 −145%	27−30 +145%
Far Cry New Dawn	14−16 −150%	35−40 +150%
Forza Horizon 4	24−27 −150%	60−65 +150%
Hitman 3	10−11 −140%	24−27 +140%
Horizon Zero Dawn	24−27 −150%	65−70 +150%
Metro Exodus	10−11 −140%	24−27 +140%
Red Dead Redemption 2	14−16 −150%	35−40 +150%
Shadow of the Tomb Raider	16−18 −135%	40−45 +135%
The Witcher 3: Wild Hunt	20 −150%	50−55 +150%
Watch Dogs: Legion	21−24 −150%	55−60 +150%

Full HD
Ultra Preset

Assassin's Creed Odyssey	10−11 −140%	24−27 +140%
Assassin's Creed Valhalla	4−5 −150%	10−11 +150%
Call of Duty: Modern Warfare	10−12 −145%	27−30 +145%
Cyberpunk 2077	8−9 −163%	21−24 +163%
Far Cry 5	10−12 −145%	27−30 +145%
Forza Horizon 4	24−27 −150%	60−65 +150%
Horizon Zero Dawn	24−27 −150%	65−70 +150%
Shadow of the Tomb Raider	16−18 −135%	40−45 +135%
The Witcher 3: Wild Hunt	11 −145%	27−30 +145%
Watch Dogs: Legion	21−24 −150%	55−60 +150%

Full HD
Epic Preset

Red Dead Redemption 2

14−16

−150%

35−40
+150%

1440p
High Preset

Battlefield 5	9−10 −133%	21−24 +133%
Far Cry New Dawn	7−8 −157%	18−20 +157%

1440p
Ultra Preset

Assassin's Creed Odyssey	5−6 −140%	12−14 +140%
Call of Duty: Modern Warfare	7−8 −157%	18−20 +157%
Cyberpunk 2077	2−3 −150%	5−6 +150%
Far Cry 5	8−9 −163%	21−24 +163%
Forza Horizon 4	8−9 −163%	21−24 +163%
Hitman 3	9−10 −133%	21−24 +133%
Horizon Zero Dawn	10−12 −145%	27−30 +145%
Metro Exodus	3−4 −133%	7−8 +133%
The Witcher 3: Wild Hunt	4−5 −150%	10−11 +150%
Watch Dogs: Legion	2−3 −150%	5−6 +150%

1440p
Epic Preset

Red Dead Redemption 2

9−10
−133%

21−24

+133%

4K
High Preset

Battlefield 5	4−5 −150%	10−11 +150%
Far Cry New Dawn	3−4 −133%	7−8 +133%
Hitman 3	1−2 −100%	2−3 +100%
Horizon Zero Dawn	5−6 −140%	12−14 +140%
Shadow of the Tomb Raider	1−2 −100%	2−3 +100%
The Witcher 3: Wild Hunt	1−2 −100%	2−3 +100%

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 −133%	7−8 +133%
Assassin's Creed Valhalla	2−3 −150%	5−6 +150%
Call of Duty: Modern Warfare	2−3 −150%	5−6 +150%
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3 −150%	5−6 +150%
Forza Horizon 4	4−5 −150%	10−11 +150%
Horizon Zero Dawn	5−6 −140%	12−14 +140%
Metro Exodus	6−7 −133%	14−16 +133%
Watch Dogs: Legion	1−2 −100%	2−3 +100%

4K
Epic Preset

Red Dead Redemption 2

6−7
−133%

14−16

+133%

This is how Quadro K420 and RX 640 compete in popular games:

RX 640 is 180% faster in 1080p

Pros & cons summary

Performance score	1.93	5.08
Recency	22 July 2014	12 August 2019
Maximum RAM amount	1 GB/2 GB	4 GB
Chip lithography	28 nm	14 nm
Power consumption (TDP)	41 Watt	50 Watt