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GeForce 840M vs Radeon HD 4550 256MB

Intro

The GeForce 840M has a core clock frequency of 1029 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 4550 256MB, which has a clock frequency of 600 MHz and a DDR3 memory speed of 800 MHz. It also features a 64-bit memory bus, and uses a 55 nm design. It is comprised of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB 25 Watts
GeForce 840M 30 Watts
Difference: 5 Watts (20%)

Memory Bandwidth

In theory, the GeForce 840M will be 25% faster than the Radeon HD 4550 256MB overall, because of its higher data rate. (explain)

GeForce 840M 16000 MB/sec
Radeon HD 4550 256MB 12800 MB/sec
Difference: 3200 (25%)

Texel Rate

The GeForce 840M is a lot (about 415%) more effective at texture filtering than the Radeon HD 4550 256MB. (explain)

GeForce 840M 24696 Mtexels/sec
Radeon HD 4550 256MB 4800 Mtexels/sec
Difference: 19896 (415%)

Pixel Rate

The GeForce 840M will be quite a bit (more or less 243%) faster with regards to AA than the Radeon HD 4550 256MB, and should be able to handle higher resolutions better. (explain)

GeForce 840M 8232 Mpixels/sec
Radeon HD 4550 256MB 2400 Mpixels/sec
Difference: 5832 (243%)

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 840M

Amazon.com

Check prices at:

Radeon HD 4550 256MB

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 840M Radeon HD 4550 256MB
Manufacturer nVidia AMD
Year March 12 2014 Sep 30, 2008
Code Name GM108 RV710
Memory 2048 MB 256 MB
Core Speed 1029 MHz 600 MHz
Memory Speed 2000 MHz 1600 MHz
Power (Max TDP) 30 watts 25 watts
Bandwidth 16000 MB/sec 12800 MB/sec
Texel Rate 24696 Mtexels/sec 4800 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 2400 Mpixels/sec
Unified Shaders 384 80(16x5)
Texture Mapping Units 24 8
Render Output Units 8 4
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 242 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 840M

Amazon.com

Check prices at:

Radeon HD 4550 256MB

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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