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Radeon HD 4890 2GB vs Radeon HD 5830

Intro

The Radeon HD 4890 2GB features a clock frequency 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 Raster Operation Units.

Compare all of that to the Radeon HD 5830, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this particular model. It features 1120(224x5) SPUs as well as 56 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830 175 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 15 Watts (9%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 is 3% quicker than the Radeon HD 4890 2GB overall, due to its higher data rate. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4890 2GB 124800 MB/sec
Difference: 3200 (3%)

Texel Rate

The Radeon HD 5830 is a small bit (approximately 12%) more effective at AF than the Radeon HD 4890 2GB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 4800 (12%)

Pixel Rate

The Radeon HD 4890 2GB is quite a bit (about 25%) better at FSAA than the Radeon HD 5830, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 4890 2GB 16000 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 3200 (25%)

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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Radeon HD 4890 2GB

Amazon.com

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Radeon HD 5830

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 Radeon HD 4890 2GB Radeon HD 5830
Manufacturer AMD AMD
Year Apr 2, 2009 February 25, 2010
Code Name RV790 XT Cypress LE
Memory 2048 MB 1024 MB
Core Speed 1000 MHz 800 MHz
Memory Speed 3900 MHz 4000 MHz
Power (Max TDP) 190 watts 175 watts
Bandwidth 124800 MB/sec 128000 MB/sec
Texel Rate 40000 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800(160x5) 1120(224x5)
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 959 million 2154 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 4890 2GB

Amazon.com

Check prices at:

Radeon HD 5830

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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