GeForce 840A vs Iris Plus Graphics 645

In this comparison between GeForce 840A and Iris Plus Graphics 645 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 840A will be the best choice, for others Iris Plus Graphics 645 will be their preference. Study the comparison tables below and make your choice.

GeForce 840A

Iris Plus Graphics 645 Check Price

Iris Plus Graphics 645 is a Laptop Graphics Card

Note: Iris Plus Graphics 645 is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Iris Plus Graphics 645 here:

Iris Plus Graphics 645 Laptops

Main Specs

	GeForce 840A	Iris Plus Graphics 645
Power consumption (TDP)	33 Watt	15 Watt
Interface	PCIe 3.0 x8	PCIe 3.0 x1
Memory type	DDR3	DDR3/DDR4
Maximum RAM amount	2 GB
Display Connectors	No outputs	No outputs
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GeForce 840A has 120% more power consumption, than Iris Plus Graphics 645.
GeForce 840A is connected by PCIe 3.0 x8, and Iris Plus Graphics 645 uses PCIe 3.0 x1 interface.
GeForce 840A is used in Desktops, and Iris Plus Graphics 645 - in Laptops.
GeForce 840A is build with Maxwell architecture, and Iris Plus Graphics 645 - with Gen. 9.5 Coffee Lake.
Core clock speed of GeForce 840A is 729 MHz higher, than Iris Plus Graphics 645.
GeForce 840A is manufactured by 28 nm process technology, and Iris Plus Graphics 645 - by 14 nm process technology.

Game benchmarks


high / 1080p	3−4	4−5
ultra / 1080p	2−3	2−3
QHD / 1440p	0−1	0−1
low / 720p	14−16	12−14
medium / 1080p	5−6	5−6
GeForce 840A and Iris Plus Graphics 645 have the same average FPS in Assassin's Creed Odyssey.
ultra / 1080p	7−8	7−8
QHD / 1440p	0−1	0−1
low / 720p	18−20	16−18
medium / 1080p	8−9	8−9
GeForce 840A and Iris Plus Graphics 645 have the same average FPS in Battlefield 5.
low / 768p	45−50	45−50
high / 1080p	30−35	45−50
QHD / 1440p	0−1	0−1
The average gaming FPS of Iris Plus Graphics 645 in Call of Duty: Warzone is 17% more, than GeForce 840A.
low / 768p	120−130	100−110
medium / 768p	90−95	80−85
ultra / 1080p	40−45	35−40
QHD / 1440p	24−27	24−27
4K / 2160p	18−20	−
high / 768p	65−70	60−65
The average gaming FPS of GeForce 840A in Counter-Strike: Global Offensive is 12% more, than Iris Plus Graphics 645.
low / 768p	80−85	55−60
ultra / 1080p	14−16	12−14
medium / 1080p	40−45	45−50
The average gaming FPS of GeForce 840A in Cyberpunk 2077 is 17% more, than Iris Plus Graphics 645.
low / 768p	75−80	65−70
medium / 768p	50−55	45−50
ultra / 1080p	27−30	21−24
The average gaming FPS of GeForce 840A in Dota 2 is 15% more, than Iris Plus Graphics 645.
high / 1080p	5−6	5−6
ultra / 1080p	−	5−6
4K / 2160p	2−3	3−4
low / 720p	14−16	12−14
medium / 1080p	6−7	5−6
The average gaming FPS of GeForce 840A in Far Cry 5 is 16% more, than Iris Plus Graphics 645.
high / 1080p	12−14	12−14
ultra / 1080p	7−8	8−9
low / 720p	50−55	45−50
medium / 1080p	14−16	12−14
The average gaming FPS of GeForce 840A in Fortnite is 10% more, than Iris Plus Graphics 645.
high / 1080p	7−8	8−9
QHD / 1440p	0−1	0−1
low / 720p	20−22	16−18
medium / 1080p	9−10	9−10
The average gaming FPS of GeForce 840A in Forza Horizon 4 is 9% more, than Iris Plus Graphics 645.
low / 768p	45−50	40−45
medium / 768p	−	35−40
high / 1080p	8−9	7−8
ultra / 1080p	5−6	5−6
QHD / 1440p	0−1	0−1
medium / 720p	40−45	−
The average gaming FPS of GeForce 840A in Grand Theft Auto V is 11% more, than Iris Plus Graphics 645.
high / 1080p	3−4	3−4
ultra / 1080p	1−2	2−3
4K / 2160p	0−1	0−1
low / 720p	8−9	7−8
medium / 1080p	4−5	4−5
GeForce 840A and Iris Plus Graphics 645 have the same average FPS in Metro Exodus.
low / 768p	85−90	85−90
high / 1080p	85−90	80−85
ultra / 1080p	80−85	70−75
medium / 1080p	85−90	−
The average gaming FPS of GeForce 840A in Minecraft is 6% more, than Iris Plus Graphics 645.
high / 1080p	−	16−18
ultra / 1080p	12−14	14−16
low / 720p	27−30	24−27
medium / 1080p	14−16	16−18
The average gaming FPS of Iris Plus Graphics 645 in PLAYERUNKNOWN'S BATTLEGROUNDS is 5% more, than GeForce 840A.
ultra / 1080p	7−8	7−8
QHD / 1440p	0−1	0−1
low / 720p	8−9	7−8
The average gaming FPS of GeForce 840A in Red Dead Redemption 2 is 14% more, than Iris Plus Graphics 645.
low / 768p	16−18	16−18
medium / 768p	12−14	12−14
high / 1080p	6−7	6−7
ultra / 1080p	5−6	5−6
GeForce 840A and Iris Plus Graphics 645 have the same average FPS in The Witcher 3: Wild Hunt.
low / 768p	70−75	80−85
medium / 768p	35−40	35−40
ultra / 1080p	16−18	14−16
high / 768p	30−35	30−33
The average gaming FPS of Iris Plus Graphics 645 in World of Tanks is 5% more, than GeForce 840A.

Full Specs

	GeForce 840A	Iris Plus Graphics 645
Architecture	Maxwell	Gen. 9.5 Coffee Lake
Code name	GM108	Kaby Lake GT3e
Type	Desktop	Laptop
Release date	17 March 2014	10 July 2019
Pipelines	384	48
Core clock speed	1029 MHz	300 MHz
Boost Clock	1124 MHz	1150 MHz
Manufacturing process technology	28 nm	14 nm
Texture fill rate	17.98	50.40
Floating-point performance	863.2 gflops
Memory bus width	64 Bit
Memory clock speed	2002 MHz
Memory bandwidth	16.02 GB/s
Shared memory		+
DirectX	12 (11_0)	12 (12_1)
Shader Model	5.1	6.4
OpenGL	4.6	4.6
OpenCL	1.2	2.1
Vulkan	1.1.126	1.1.103
CUDA	5.0
Quick Sync		+
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GeForce 840A vs Iris Plus Graphics 645

Iris Plus Graphics 645 is a Laptop Graphics Card

Main Specs

Game benchmarks

Full Specs

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