GeForce GT 640 vs GT 755M SLI

Place in performance ranking	465	733
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.13	0.20
Architecture	Kepler (2012−2018)	Kepler (2012−2018)
GPU code name	N14P-?	GK107
Market segment	Laptop	Desktop
Release date	1 November 2013 (10 years ago)	5 June 2012 (12 years ago)
Launch price (MSRP)	no data	$99
Current price	$545	$157 (1.6x MSRP)

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GT 755M SLI has 965% better value for money than GT 640.

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	768	384
Core clock speed	980 MHz	902 MHz
Number of transistors	2x 1300 Million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	2x ~50 Watt	65 Watt
Texture fill rate	no data	28.86
Floating-point performance	no data	692.7 gflops

Form factor & compatibility

Information on GeForce GT 755M SLI and GeForce GT 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	large	no data
Interface	no data	PCIe 3.0 x16
Length	no data	145 mm
Width	no data	1-slot
Supplementary power connectors	no data	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	DDR3
Maximum RAM amount	2x 2 GB	2 GB
Memory bus width	2x 128 Bit	128 Bit
Memory clock speed	5400 MHz	1782 MHz
Memory bandwidth	no data	28.51 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	no data	1x DVI, 1x HDMI, 1x DisplayPort
HDMI	no data	+

API compatibility

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

DirectX	11	12 (11_0)
Shader Model	no data	5.1
OpenGL	no data	4.6
OpenCL	no data	1.2
Vulkan	no data	1.1.126
CUDA	+	3.0

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.

GT 755M SLI 8.65
+185%

GT 640 3.04

GT 755M SLI outperforms GT 640 by 185% based on our aggregate benchmark results.

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.

Benchmark coverage: 14%

GT 755M SLI 4106
+163%

GT 640 1560

GT 755M SLI outperforms GT 640 by 163% in 3DMark Fire Strike Graphics.

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

35
+192%

12−14

−192%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

14−16

+250%

4−5
−250%

Full HD
Medium Preset

Assassin's Creed Odyssey	18−20 +200%	6−7 −200%
Assassin's Creed Valhalla	12−14 +200%	4−5 −200%
Battlefield 5	24−27 +189%	9−10 −189%
Call of Duty: Modern Warfare	18−20 +200%	6−7 −200%
Cyberpunk 2077	14−16 +250%	4−5 −250%
Far Cry 5	20−22 +186%	7−8 −186%
Far Cry New Dawn	24−27 +200%	8−9 −200%
Forza Horizon 4	40−45 +200%	14−16 −200%
Hitman 3	16−18 +220%	5−6 −220%
Horizon Zero Dawn	35−40 +217%	12−14 −217%
Metro Exodus	24−27 +213%	8−9 −213%
Red Dead Redemption 2	24−27 +200%	8−9 −200%
Shadow of the Tomb Raider	27−30 +200%	9−10 −200%
Watch Dogs: Legion	30−35 +220%	10−11 −220%

Full HD
High Preset

Assassin's Creed Odyssey	18−20 +200%	6−7 −200%
Assassin's Creed Valhalla	12−14 +200%	4−5 −200%
Battlefield 5	24−27 +189%	9−10 −189%
Call of Duty: Modern Warfare	18−20 +200%	6−7 −200%
Cyberpunk 2077	14−16 +250%	4−5 −250%
Far Cry 5	20−22 +186%	7−8 −186%
Far Cry New Dawn	24−27 +200%	8−9 −200%
Forza Horizon 4	40−45 +200%	14−16 −200%
Hitman 3	16−18 +220%	5−6 −220%
Horizon Zero Dawn	35−40 +217%	12−14 −217%
Metro Exodus	24−27 +213%	8−9 −213%
Red Dead Redemption 2	24−27 +200%	8−9 −200%
Shadow of the Tomb Raider	27−30 +200%	9−10 −200%
The Witcher 3: Wild Hunt	18−20 +200%	6−7 −200%
Watch Dogs: Legion	30−35 +220%	10−11 −220%

Full HD
Ultra Preset

Assassin's Creed Odyssey	18−20 +200%	6−7 −200%
Assassin's Creed Valhalla	12−14 +200%	4−5 −200%
Call of Duty: Modern Warfare	18−20 +200%	6−7 −200%
Cyberpunk 2077	14−16 +250%	4−5 −250%
Far Cry 5	20−22 +186%	7−8 −186%
Forza Horizon 4	40−45 +200%	14−16 −200%
Horizon Zero Dawn	35−40 +217%	12−14 −217%
Shadow of the Tomb Raider	27−30 +200%	9−10 −200%
The Witcher 3: Wild Hunt	18−20 +200%	6−7 −200%
Watch Dogs: Legion	30−35 +220%	10−11 −220%

Full HD
Epic Preset

Red Dead Redemption 2

24−27

+200%

8−9
−200%

1440p
High Preset

Battlefield 5	16−18 +240%	5−6 −240%
Far Cry New Dawn	14−16 +250%	4−5 −250%

1440p
Ultra Preset

Assassin's Creed Odyssey	8−9 +300%	2−3 −300%
Assassin's Creed Valhalla	4−5 +300%	1−2 −300%
Call of Duty: Modern Warfare	10−12 +267%	3−4 −267%
Cyberpunk 2077	4−5 +300%	1−2 −300%
Far Cry 5	14−16 +250%	4−5 −250%
Forza Horizon 4	16−18 +220%	5−6 −220%
Hitman 3	12−14 +200%	4−5 −200%
Horizon Zero Dawn	18−20 +200%	6−7 −200%
Metro Exodus	10−12 +267%	3−4 −267%
Shadow of the Tomb Raider	9−10 +200%	3−4 −200%
The Witcher 3: Wild Hunt	8−9 +300%	2−3 −300%
Watch Dogs: Legion	4−5 +300%	1−2 −300%

1440p
Epic Preset

Red Dead Redemption 2

14−16

+250%

4−5
−250%

4K
High Preset

Battlefield 5	8−9 +300%	2−3 −300%
Far Cry New Dawn	6−7 +200%	2−3 −200%
Hitman 3	5−6 +400%	1−2 −400%
Horizon Zero Dawn	9−10 +200%	3−4 −200%
Shadow of the Tomb Raider	4−5 +300%	1−2 −300%
The Witcher 3: Wild Hunt	6−7 +200%	2−3 −200%

4K
Ultra Preset

Assassin's Creed Odyssey	5−6 +400%	1−2 −400%
Assassin's Creed Valhalla	4−5 +300%	1−2 −300%
Call of Duty: Modern Warfare	4−5 +300%	1−2 −300%
Cyberpunk 2077	1−2	0−1
Far Cry 5	5−6 +400%	1−2 −400%
Forza Horizon 4	10−11 +233%	3−4 −233%
Horizon Zero Dawn	9−10 +200%	3−4 −200%
Metro Exodus	9−10 +200%	3−4 −200%
Watch Dogs: Legion	3−4 +200%	1−2 −200%