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GeForce GTX 880M vs Radeon HD 4890 2GB

Intro

The GeForce GTX 880M features a GPU core clock speed of 954 MHz, and the 4096 MB of GDDR5 RAM is set to run at 1000 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 4890 2GB, which uses a 55 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM is set to run at a speed of 975 MHz on this model. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 60 Watts (46%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M should be just a bit faster than the Radeon HD 4890 2GB in general. (explain)

GeForce GTX 880M 128000 MB/sec
Radeon HD 4890 2GB 124800 MB/sec
Difference: 3200 (3%)

Texel Rate

The GeForce GTX 880M will be a lot (approximately 205%) more effective at texture filtering than the Radeon HD 4890 2GB. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 82112 (205%)

Pixel Rate

The GeForce GTX 880M will be quite a bit (approximately 91%) more effective at anti-aliasing than the Radeon HD 4890 2GB, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 14528 (91%)

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 4890 2GB

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 4890 2GB
Manufacturer nVidia AMD
Year March 12 2014 Apr 2, 2009
Code Name GK104 RV790 XT
Memory 4096 MB 2048 MB
Core Speed 954 MHz 1000 MHz
Memory Speed 4000 MHz 3900 MHz
Power (Max TDP) 130 watts 190 watts
Bandwidth 128000 MB/sec 124800 MB/sec
Texel Rate 122112 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1536 800(160x5)
Texture Mapping Units 128 40
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 maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's 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 output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 880M

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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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