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GeForce GTX 460 (OEM) vs Radeon HD 4890 2GB

Intro

The GeForce GTX 460 (OEM) comes with a clock frequency of 650 MHz and a GDDR5 memory speed of 850 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 336 SPUs, 56 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon HD 4890 2GB, which has a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 (OEM) 150 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 40 Watts (27%)

Memory Bandwidth

The Radeon HD 4890 2GB should theoretically perform a little bit faster than the GeForce GTX 460 (OEM) overall. (explain)

Radeon HD 4890 2GB 124800 MB/sec
GeForce GTX 460 (OEM) 108800 MB/sec
Difference: 16000 (15%)

Texel Rate

The Radeon HD 4890 2GB is a small bit (approximately 10%) more effective at anisotropic filtering than the GeForce GTX 460 (OEM). (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
GeForce GTX 460 (OEM) 36400 Mtexels/sec
Difference: 3600 (10%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 460 (OEM) is a better choice, by far. (explain)

GeForce GTX 460 (OEM) 20800 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 4800 (30%)

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 460 (OEM)

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.

Specifications

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Model GeForce GTX 460 (OEM) Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year October 2010 Apr 2, 2009
Code Name GF104 RV790 XT
Memory 1024 MB 2048 MB
Core Speed 650 MHz 1000 MHz
Memory Speed 3400 MHz 3900 MHz
Power (Max TDP) 150 watts 190 watts
Bandwidth 108800 MB/sec 124800 MB/sec
Texel Rate 36400 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 20800 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 336 800(160x5)
Texture Mapping Units 56 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1950 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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 460 (OEM)

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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