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GeForce GTX 470 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 470 has a clock speed of 607 MHz and a GDDR5 memory frequency of 837 MHz. It also uses a 320-bit bus, and makes use of a 40 nm design. It is made up of 448 SPUs, 56 Texture Address Units, and 40 Raster Operation Units.

Compare all of that to the Radeon HD 4890 1GB, which makes use of a 55 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run 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 1GB 190 Watts
GeForce GTX 470 215 Watts
Difference: 25 Watts (13%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 470 should theoretically be a small bit better than the Radeon HD 4890 1GB in general. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 9120 (7%)

Texel Rate

The Radeon HD 4890 1GB should be a small bit (approximately 18%) more effective at anisotropic filtering than the GeForce GTX 470. (explain)

Radeon HD 4890 1GB 40000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 6008 (18%)

Pixel Rate

The GeForce GTX 470 should be quite a bit (more or less 52%) more effective at full screen anti-aliasing than the Radeon HD 4890 1GB, and should be capable of handling higher screen resolutions better. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 4890 1GB 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

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.

Specifications

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Model GeForce GTX 470 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year March 2010 Apr 2, 2009
Code Name GF100 RV790 XT
Memory 1280 MB 1024 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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of 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 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 get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 470

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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