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GeForce GTX 980M vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 980M comes with a clock frequency of 1038 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is comprised of 1536 SPUs, 96 TAUs, and 64 ROPs.

Compare those specifications to the Radeon HD 4850 X2 512MB, which comes with a core clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 150 Watts (150%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980M should theoretically be just a bit superior to the Radeon HD 4850 X2 512MB overall. (explain)

GeForce GTX 980M 128000 MB/sec
Radeon HD 4850 X2 512MB 127104 MB/sec
Difference: 896 (1%)

Texel Rate

The GeForce GTX 980M will be quite a bit (approximately 99%) better at texture filtering than the Radeon HD 4850 X2 512MB. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Difference: 49648 (99%)

Pixel Rate

The GeForce GTX 980M is much (more or less 232%) better at FSAA than the Radeon HD 4850 X2 512MB, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Difference: 46432 (232%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 980M

Amazon.com

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Radeon HD 4850 X2 512MB

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 4850 X2 512MB
Manufacturer nVidia AMD
Year October 7 2014 Nov 7, 2008
Code Name GM204 R700
Memory 4096 MB 512 MB (x2)
Core Speed 1038 MHz 625 MHz (x2)
Memory Speed 4000 MHz 1986 MHz (x2)
Power (Max TDP) 100 watts 250 watts
Bandwidth 128000 MB/sec 127104 MB/sec
Texel Rate 99648 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 66432 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 1536 800(160x5) (x2)
Texture Mapping Units 96 40 (x2)
Render Output Units 64 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of 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 calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the max fill rate.

Display Prices

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GeForce GTX 980M

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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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