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GeForce GTX 880M vs Radeon HD 4890 1GB

Intro

The GeForce GTX 880M comes with clock speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 4890 1GB, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 60 Watts (46%)

Memory Bandwidth

In theory, the GeForce GTX 880M should perform a bit faster than the Radeon HD 4890 1GB overall. (explain)

GeForce GTX 880M 128000 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 3200 (3%)

Texel Rate

The GeForce GTX 880M should be much (more or less 205%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 82112 (205%)

Pixel Rate

The GeForce GTX 880M is a lot (about 91%) more effective at full screen anti-aliasing than the Radeon HD 4890 1GB, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 4890 1GB 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

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Radeon HD 4890 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 4890 1GB
Manufacturer nVidia AMD
Year March 12 2014 Apr 2, 2009
Code Name GK104 RV790 XT
Memory 4096 MB 1024 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: Bandwidth is the largest amount of data (measured in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes 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 maximum fill rate.

Display Prices

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GeForce GTX 880M

Amazon.com

Check prices at:

Radeon HD 4890 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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