GeForce 820A vs GT 745A

Place in the ranking	744	992
Place by popularity	not in top-100	not in top-100
Power efficiency	6.76	6.67
Architecture	Kepler (2012−2018)	Fermi 2.0 (2010−2014)
GPU code name	GK107	GF117
Market segment	Laptop	Laptop
Release date	26 August 2013 (11 years ago)	17 March 2014 (10 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 cores	384	96
Core clock speed	837 MHz	775 MHz
Boost clock speed	915 MHz	no data
Number of transistors	1,270 million	585 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	33 Watt	15 Watt
Texture fill rate	29.28	12.40
Floating-point processing power	0.7027 TFLOPS	0.2976 TFLOPS
ROPs	16	8
TMUs	32	16

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 2.0 x16

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	DDR3	DDR3
Maximum RAM amount	2 GB	1 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	900 MHz	900 MHz
Memory bandwidth	28.8 GB/s	14.4 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

No outputs

API compatibility

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

DirectX	12 (11_0)	12 (11_0)
Shader Model	5.1	5.1
OpenGL	4.6	4.6
OpenCL	1.2	1.1
Vulkan	1.1.126	N/A
CUDA	3.0	2.1

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.

GT 745A 3.21
+123%

GeForce 820A 1.44

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.

GT 745A 1240
+123%

GeForce 820A 555