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GeForce GTX 880M vs Radeon HD 4790

Intro

The GeForce GTX 880M features a GPU core clock speed of 954 MHz, and the 4096 MB of GDDR5 memory is set to run at 1000 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon HD 4790, which makes use of a 55 nm design. AMD has set the core frequency at 600 MHz. The GDDR5 memory is set to run at a frequency of 800 MHz on this model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M will be 25% quicker than the Radeon HD 4790 overall, due to its greater data rate. (explain)

GeForce GTX 880M 128000 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 25600 (25%)

Texel Rate

The GeForce GTX 880M is quite a bit (more or less 536%) faster with regards to anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 102912 (536%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 880M is the winner, by a large margin. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 20928 (218%)

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 GTX 880M

Amazon.com

Check prices at:

Radeon HD 4790

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 GTX 880M Radeon HD 4790
Manufacturer nVidia AMD
Year March 12 2014 2009
Code Name GK104 RV790
Memory 4096 MB 512 MB
Core Speed 954 MHz 600 MHz
Memory Speed 4000 MHz 3200 MHz
Power (Max TDP) 130 watts (Unknown) watts
Bandwidth 128000 MB/sec 102400 MB/sec
Texel Rate 122112 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 1536 640(128x5)
Texture Mapping Units 128 32
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 959 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 largest amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 880M

Amazon.com

Check prices at:

Radeon HD 4790

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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