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GeForce GT 440 1.5GB vs Radeon HD 4870 X2

Intro

The GeForce GT 440 1.5GB has clock speeds of 594 MHz on the GPU, and 900 MHz on the 1536 MB of GDDR3 RAM. It features 144 SPUs as well as 24 TAUs and 24 Rasterization Operator Units.

Compare that to the Radeon HD 4870 X2, which comes with a clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB 56 Watts
Radeon HD 4870 X2 350 Watts
Difference: 294 Watts (525%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should in theory be much superior to the GeForce GT 440 1.5GB in general. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GT 440 1.5GB 43200 MB/sec
Difference: 187200 (433%)

Texel Rate

The Radeon HD 4870 X2 is quite a bit (approximately 321%) more effective at AF than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GT 440 1.5GB 14256 Mtexels/sec
Difference: 45744 (321%)

Pixel Rate

The Radeon HD 4870 X2 will be quite a bit (about 68%) more effective at anti-aliasing than the GeForce GT 440 1.5GB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
GeForce GT 440 1.5GB 14256 Mpixels/sec
Difference: 9744 (68%)

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 GT 440 1.5GB

Amazon.com

Check prices at:

Radeon HD 4870 X2

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 GT 440 1.5GB Radeon HD 4870 X2
Manufacturer nVidia AMD
Year October 2010 Aug 12, 2008
Code Name GF106 R700
Memory 1536 MB 1024 MB (x2)
Core Speed 594 MHz 750 MHz (x2)
Memory Speed 1800 MHz 3600 MHz (x2)
Power (Max TDP) 56 watts 350 watts
Bandwidth 43200 MB/sec 230400 MB/sec
Texel Rate 14256 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 14256 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 144 800(160x5) (x2)
Texture Mapping Units 24 40 (x2)
Render Output Units 24 16 (x2)
Bus Type GDDR3 GDDR5
Bus Width 192-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1170 million 956 million
Bus PCIe x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 applied in one second. This number is calculated by multiplying the total number of texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could 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 card's 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 fill 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 GT 440 1.5GB

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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