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GeForce GTX 470 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 470 comes with a GPU core speed of 607 MHz, and the 1280 MB of GDDR5 memory is set to run at 837 MHz through a 320-bit bus. It also is comprised of 448 SPUs, 56 TAUs, and 40 ROPs.

Compare all of that to the Radeon HD 4890 2GB, which makes use of a 55 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 975 MHz on this model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 2GB 190 Watts
GeForce GTX 470 215 Watts
Difference: 25 Watts (13%)

Memory Bandwidth

Performance-wise, the GeForce GTX 470 should theoretically be a little bit better than the Radeon HD 4890 2GB overall. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 4890 2GB 124800 MB/sec
Difference: 9120 (7%)

Texel Rate

The Radeon HD 4890 2GB should be a bit (approximately 18%) better at AF than the GeForce GTX 470. (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 6008 (18%)

Pixel Rate

The GeForce GTX 470 should be much (more or less 52%) faster with regards to FSAA than the Radeon HD 4890 2GB, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 8280 (52%)

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 470

Amazon.com

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Radeon HD 4890 2GB

Amazon.com

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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 470 Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year March 2010 Apr 2, 2009
Code Name GF100 RV790 XT
Memory 1280 MB 2048 MB
Core Speed 607 MHz 1000 MHz
Memory Speed 3348 MHz 3900 MHz
Power (Max TDP) 215 watts 190 watts
Bandwidth 133920 MB/sec 124800 MB/sec
Texel Rate 33992 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 448 800(160x5)
Texture Mapping Units 56 40
Render Output Units 40 16
Bus Type GDDR5 GDDR5
Bus Width 320-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 3000 million 959 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 470

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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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