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GeForce GTX 980M vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 980M uses a 28 nm design. nVidia has clocked the core frequency at 1038 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular model. It features 1536 SPUs as well as 96 TAUs and 64 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 X2 1GB, which comes with a GPU core clock speed of 625 MHz, and 1024 MB of GDDR3 RAM running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 150 Watts (150%)

Memory Bandwidth

In theory, the GeForce GTX 980M is 1% quicker than the Radeon HD 4850 X2 1GB overall, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 980M will be quite a bit (about 99%) faster with regards to texture filtering than the Radeon HD 4850 X2 1GB. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 49648 (99%)

Pixel Rate

The GeForce GTX 980M is quite a bit (approximately 232%) faster with regards to AA than the Radeon HD 4850 X2 1GB, and able to handle higher resolutions better. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon HD 4850 X2 1GB 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

Check prices at:

Radeon HD 4850 X2 1GB

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 1GB
Manufacturer nVidia AMD
Year October 7 2014 Nov 7, 2008
Code Name GM204 R700
Memory 4096 MB 1024 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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 980M

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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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