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GeForce 820M vs Radeon HD 5450

Intro

The GeForce 820M comes with a GPU core clock speed of 719 MHz, and the 2048 MB of DDR3 RAM runs at 1000 MHz through a 64-bit bus. It also features 96 SPUs, 16 Texture Address Units, and 4 ROPs.

Compare all that to the Radeon HD 5450, which makes use of a 40 nm design. AMD has clocked the core speed at 650 MHz. The DDR3 RAM runs at a frequency of 800 MHz on this model. It features 80(16x5) SPUs as well as 8 TAUs and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon HD 5450 19 Watts
Difference: 4 Watts (27%)

Memory Bandwidth

Performance-wise, the GeForce 820M should theoretically be a lot superior to the Radeon HD 5450 in general. (explain)

GeForce 820M 16000 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 3200 (25%)

Texel Rate

The GeForce 820M should be a lot (approximately 121%) better at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce 820M 11504 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 6304 (121%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 820M is a better choice, though only just barely. (explain)

GeForce 820M 2876 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 276 (11%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 820M

Amazon.com

Check prices at:

Radeon HD 5450

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 820M Radeon HD 5450
Manufacturer nVidia AMD
Year February 2014 February 4, 2010
Code Name GF117 Cedar PRO
Memory 2048 MB 512 MB
Core Speed 719 MHz 650 MHz
Memory Speed 2000 MHz 1600 MHz
Power (Max TDP) 15 watts 19 watts
Bandwidth 16000 MB/sec 12800 MB/sec
Texel Rate 11504 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 96 80(16x5)
Texture Mapping Units 16 8
Render Output Units 4 4
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 292 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

Radeon HD 5450

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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