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Radeon HD 4890 2GB vs Radeon HD 5830

Intro

The Radeon HD 4890 2GB makes use of a 55 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory runs at a frequency of 975 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 5830, which has a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 TAUs, and 16 Raster Operation Units.

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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

As far as performance goes, the Radeon HD 5830 should in theory be a bit better than the Radeon HD 4890 2GB in general. (explain)

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

Texel Rate

The Radeon HD 5830 should be a bit (approximately 12%) faster with regards to 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 will be much (approximately 25%) better at full screen anti-aliasing than the Radeon HD 5830, and capable of handling higher screen resolutions without losing too much performance. (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

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.

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

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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