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GeForce GTX 880M vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 880M features a core clock frequency of 954 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon HD 4850 X2 1GB, which has a clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 120 Watts (92%)

Memory Bandwidth

Performance-wise, the GeForce GTX 880M should theoretically be a small bit superior to the Radeon HD 4850 X2 1GB overall. (explain)

GeForce GTX 880M 128000 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 896 (1%)

Texel Rate

The GeForce GTX 880M should be quite a bit (more or less 144%) faster with regards to anisotropic filtering than the Radeon HD 4850 X2 1GB. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 72112 (144%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 880M is superior to the Radeon HD 4850 X2 1GB, by a large margin. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Difference: 10528 (53%)

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 880M

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 880M Radeon HD 4850 X2 1GB
Manufacturer nVidia AMD
Year March 12 2014 Nov 7, 2008
Code Name GK104 R700
Memory 4096 MB 1024 MB (x2)
Core Speed 954 MHz 625 MHz (x2)
Memory Speed 4000 MHz 1986 MHz (x2)
Power (Max TDP) 130 watts 250 watts
Bandwidth 128000 MB/sec 127104 MB/sec
Texel Rate 122112 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 1536 800(160x5) (x2)
Texture Mapping Units 128 40 (x2)
Render Output Units 32 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 (counted in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 880M

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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