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GeForce GTX 980M vs Radeon HD 4890 2GB

Intro

The GeForce GTX 980M features a GPU core clock speed of 1038 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, 96 TAUs, and 64 Raster Operation Units.

Compare all that to the Radeon HD 4890 2GB, which features a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 975 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 90 Watts (90%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M should be 3% faster than the Radeon HD 4890 2GB in general, because of its higher bandwidth. (explain)

GeForce GTX 980M 128000 MB/sec
Radeon HD 4890 2GB 124800 MB/sec
Difference: 3200 (3%)

Texel Rate

The GeForce GTX 980M will be quite a bit (approximately 149%) better at AF than the Radeon HD 4890 2GB. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 59648 (149%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 980M is the winner, by a large margin. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 50432 (315%)

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 980M

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 980M Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year October 7 2014 Apr 2, 2009
Code Name GM204 RV790 XT
Memory 4096 MB 2048 MB
Core Speed 1038 MHz 1000 MHz
Memory Speed 4000 MHz 3900 MHz
Power (Max TDP) 100 watts 190 watts
Bandwidth 128000 MB/sec 124800 MB/sec
Texel Rate 99648 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 66432 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1536 800(160x5)
Texture Mapping Units 96 40
Render Output Units 64 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 moved past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 980M

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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