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Radeon HD 4870 1GB vs Radeon HD 5830

Intro

The Radeon HD 4870 1GB comes with core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 5830, which features a core clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit memory bus, and uses a 40 nm design. It features 1120(224x5) SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB 150 Watts
Radeon HD 5830 175 Watts
Difference: 25 Watts (17%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be a small bit faster than the Radeon HD 4870 1GB in general. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4870 1GB 115200 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon HD 5830 is a lot (about 49%) better at texture filtering than the Radeon HD 4870 1GB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 14800 (49%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5830 is a better choice, though not by far. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 800 (7%)

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 4870 1GB

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 4870 1GB Radeon HD 5830
Manufacturer AMD AMD
Year Jun 25, 2008 February 25, 2010
Code Name RV770 XT Cypress LE
Memory 1024 MB 1024 MB
Core Speed 750 MHz 800 MHz
Memory Speed 3600 MHz 4000 MHz
Power (Max TDP) 150 watts 175 watts
Bandwidth 115200 MB/sec 128000 MB/sec
Texel Rate 30000 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 12000 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 956 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 largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 1GB

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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