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Radeon HD 4870 512MB vs Radeon HD 5830

Intro

The Radeon HD 4870 512MB comes with a GPU core clock speed of 750 MHz, and the 512 MB of GDDR5 RAM is set to run at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon HD 5830, which makes use of a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this model. It features 1120(224x5) SPUs as well as 56 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 512MB 150 Watts
Radeon HD 5830 175 Watts
Difference: 25 Watts (17%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be 11% quicker than the Radeon HD 4870 512MB overall, due to its greater data rate. (explain)

Radeon HD 5830 128000 MB/sec
Radeon HD 4870 512MB 115200 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon HD 5830 should be quite a bit (about 49%) better at anisotropic filtering than the Radeon HD 4870 512MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 14800 (49%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5830 is the winner, but only just. (explain)

Radeon HD 5830 12800 Mpixels/sec
Radeon HD 4870 512MB 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 512MB

Amazon.com

Check prices at:

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 4870 512MB Radeon HD 5830
Manufacturer AMD AMD
Year Jun 25, 2008 February 25, 2010
Code Name RV770 XT Cypress LE
Memory 512 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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 4870 512MB

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.

Comments

2 Responses to “Radeon HD 4870 512MB vs Radeon HD 5830”
wim says:

geforce 315

Compare hd4870 | Askamigos says:

[...] Radeon HD 4870 512MB vs Radeon HD 5830 – Performance …Jun 8, 2011 … Compare all that to the Radeon HD 5830, which features GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz … [...]

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