GeForce GT 645M vs Iris Graphics 6100

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Aggregate performance score

We've compared Iris Graphics 6100 and GeForce GT 645M, covering specs and all relevant benchmarks.

Iris Graphics 6100
2015
15 Watt
2.34

GT 645M outperforms Iris Graphics 6100 by a minimal 3% based on our aggregate benchmark results.

Primary details

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

Place in the ranking849842
Place by popularitynot in top-100not in top-100
Power efficiency10.695.18
ArchitectureGeneration 8.0 (2014−2015)Kepler (2012−2018)
GPU code nameBroadwell GT3GK107
Market segmentLaptopLaptop
Release date5 January 2015 (9 years ago)1 October 2012 (12 years 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 cores384384
Core clock speed300 MHzUp to 710 MHz
Boost clock speed1000 MHzno data
Number of transistors189 million1,270 million
Manufacturing process technology14 nm28 nm
Power consumption (TDP)15 Watt32 Watt
Texture fill rate48.0022.69
Floating-point processing power0.768 TFLOPS0.5445 TFLOPS
ROPs616
TMUs4832

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).

Laptop sizeno datamedium sized
Bus supportno dataPCI Express 2.0, PCI Express 3.0
InterfaceRing BusPCIe 3.0 x16
Supplementary power connectorsNoneno 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 typeSystem SharedDDR3\GDDR5
Maximum RAM amountSystem Shared2 GB
Memory bus widthSystem Shared128bit
Memory clock speedSystem Shared900 MHz
Memory bandwidthno dataUp to 64.0 GB/s
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 ConnectorsPortable Device DependentNo outputs
HDMI-+
HDCP-+
Maximum VGA resolutionno dataUp to 2048x1536

Supported technologies

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

3D Blu-Ray-+
Optimus-+
Quick Sync+no data

API compatibility

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

DirectX12 (11_1)12 API
Shader Model5.15.1
OpenGL4.44.5
OpenCL3.01.1
Vulkan+1.1.126
CUDA-+

Synthetic benchmark performance

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


Combined synthetic benchmark score

This is our combined benchmark 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.

Iris Graphics 6100 2.34
GT 645M 2.42
+3.4%

Passmark

This is the most ubiquitous GPU benchmark. 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.

Iris Graphics 6100 900
GT 645M 932
+3.6%

3DMark 11 Performance GPU

3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.

Iris Graphics 6100 1695
GT 645M 1845
+8.9%

3DMark Vantage Performance

3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.

Iris Graphics 6100 6531
GT 645M 7357
+12.6%

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

Iris Graphics 6100 874
GT 645M 1152
+31.8%

3DMark Cloud Gate GPU

Cloud Gate is an outdated DirectX 11 feature level 10 benchmark that was used for home PCs and basic notebooks. It displays a few scenes of some weird space teleportation device launching spaceships into unknown, using fixed resolution of 1280x720. Just like Ice Storm benchmark, it has been discontinued in January 2020 and replaced by 3DMark Night Raid.

Iris Graphics 6100 7798
GT 645M 8655
+11%

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:

900p27−30
−11.1%
30
+11.1%
Full HD14
−64.3%
23
+64.3%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077 4−5
−25%
5−6
+25%

Full HD
Medium Preset

Assassin's Creed Odyssey 7−8
−14.3%
8−9
+14.3%
Battlefield 5 1−2
−200%
3−4
+200%
Call of Duty: Modern Warfare 5−6
−20%
6−7
+20%
Cyberpunk 2077 4−5
−25%
5−6
+25%
Far Cry 5 3−4
−33.3%
4−5
+33.3%
Far Cry New Dawn 5−6
−20%
6−7
+20%
Forza Horizon 4 8−9
−37.5%
10−12
+37.5%
Hitman 3 7−8
+0%
7−8
+0%
Horizon Zero Dawn 18−20
−11.1%
20−22
+11.1%
Red Dead Redemption 2 4−5
−25%
5−6
+25%
Shadow of the Tomb Raider 10−11
−10%
10−12
+10%
Watch Dogs: Legion 35−40
−2.8%
35−40
+2.8%

Full HD
High Preset

Assassin's Creed Odyssey 7−8
−14.3%
8−9
+14.3%
Battlefield 5 1−2
−200%
3−4
+200%
Call of Duty: Modern Warfare 5−6
−20%
6−7
+20%
Cyberpunk 2077 4−5
−25%
5−6
+25%
Far Cry 5 3−4
−33.3%
4−5
+33.3%
Far Cry New Dawn 5−6
−20%
6−7
+20%
Forza Horizon 4 8−9
−37.5%
10−12
+37.5%
Hitman 3 7−8
+0%
7−8
+0%
Horizon Zero Dawn 18−20
−11.1%
20−22
+11.1%
Red Dead Redemption 2 4−5
−25%
5−6
+25%
Shadow of the Tomb Raider 10−11
−10%
10−12
+10%
The Witcher 3: Wild Hunt 14
+7.7%
12−14
−7.7%
Watch Dogs: Legion 35−40
−2.8%
35−40
+2.8%

Full HD
Ultra Preset

Assassin's Creed Odyssey 7−8
−14.3%
8−9
+14.3%
Call of Duty: Modern Warfare 5−6
−20%
6−7
+20%
Cyberpunk 2077 4−5
−25%
5−6
+25%
Far Cry 5 3−4
−33.3%
4−5
+33.3%
Forza Horizon 4 8−9
−37.5%
10−12
+37.5%
Hitman 3 7−8
+0%
7−8
+0%
Horizon Zero Dawn 18−20
−11.1%
20−22
+11.1%
Shadow of the Tomb Raider 10−11
−10%
10−12
+10%
The Witcher 3: Wild Hunt 12−14
−8.3%
12−14
+8.3%
Watch Dogs: Legion 35−40
−2.8%
35−40
+2.8%

Full HD
Epic Preset

Red Dead Redemption 2 4−5
−25%
5−6
+25%

1440p
High Preset

Battlefield 5 3−4
−33.3%
4−5
+33.3%
Far Cry New Dawn 3−4
−33.3%
4−5
+33.3%

1440p
Ultra Preset

Assassin's Creed Odyssey 2−3
+0%
2−3
+0%
Call of Duty: Modern Warfare 1−2
+0%
1−2
+0%
Cyberpunk 2077 1−2
+0%
1−2
+0%
Far Cry 5 2−3
−50%
3−4
+50%
Hitman 3 7−8
+0%
7−8
+0%
Horizon Zero Dawn 6−7
+0%
6−7
+0%
The Witcher 3: Wild Hunt 1−2
−100%
2−3
+100%
Watch Dogs: Legion 10−12
−27.3%
14−16
+27.3%

1440p
Epic Preset

Red Dead Redemption 2 5−6
+0%
5−6
+0%

4K
High Preset

Far Cry New Dawn 1−2
+0%
1−2
+0%

4K
Ultra Preset

Assassin's Creed Odyssey 2−3
+0%
2−3
+0%
Assassin's Creed Valhalla 1−2
+0%
1−2
+0%
Call of Duty: Modern Warfare 1−2
+0%
1−2
+0%
Far Cry 5 1−2
+0%
1−2
+0%
Watch Dogs: Legion 0−1 0−1

4K
Epic Preset

Red Dead Redemption 2 3−4
+0%
3−4
+0%

Full HD
Medium Preset

Metro Exodus 1−2
+0%
1−2
+0%

Full HD
High Preset

Metro Exodus 1−2
+0%
1−2
+0%

4K
High Preset

Battlefield 5 0−1 0−1

This is how Iris Graphics 6100 and GT 645M compete in popular games:

  • GT 645M is 11% faster in 900p
  • GT 645M is 64% faster in 1080p

Here's the range of performance differences observed across popular games:

  • in The Witcher 3: Wild Hunt, with 1080p resolution and the High Preset, the Iris Graphics 6100 is 8% faster.
  • in Battlefield 5, with 1080p resolution and the Medium Preset, the GT 645M is 200% faster.

All in all, in popular games:

  • Iris Graphics 6100 is ahead in 1 test (2%)
  • GT 645M is ahead in 38 tests (68%)
  • there's a draw in 17 tests (30%)

Pros & cons summary


Performance score 2.34 2.42
Recency 5 January 2015 1 October 2012
Chip lithography 14 nm 28 nm
Power consumption (TDP) 15 Watt 32 Watt

Iris Graphics 6100 has an age advantage of 2 years, a 100% more advanced lithography process, and 113.3% lower power consumption.

GT 645M, on the other hand, has a 3.4% higher aggregate performance score.

Given the minimal performance differences, no clear winner can be declared between Iris Graphics 6100 and GeForce GT 645M.


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

Vote for your favorite

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Intel Iris Graphics 6100
Iris Graphics 6100
NVIDIA GeForce GT 645M
GeForce GT 645M

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.2 133 votes

Rate Iris Graphics 6100 on a scale of 1 to 5:

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3.5 97 votes

Rate GeForce GT 645M on a scale of 1 to 5:

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Questions & comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.