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Radeon HD 4830 512MB vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 4830 512MB comes with a core clock frequency of 575 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this card. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 64 Watts (206%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4830 512MB should in theory be quite a bit better than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 4830 512MB 57600 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 44800 (350%)

Texel Rate

The Radeon HD 4830 512MB will be a lot (more or less 268%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 4830 512MB 18400 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 13400 (268%)

Pixel Rate

The Radeon HD 4830 512MB should be much (more or less 268%) faster with regards to full screen anti-aliasing than the Radeon HD 6450 (OEM), and also able to handle higher resolutions better. (explain)

Radeon HD 4830 512MB 9200 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 6700 (268%)

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 4830 512MB

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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 4830 512MB Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year Oct 21, 2008 February 2011
Code Name RV770 LE Caicos
Memory 512 MB 512 MB
Core Speed 575 MHz 625 MHz
Memory Speed 1800 MHz 1600 MHz
Power (Max TDP) 95 watts 31 watts
Bandwidth 57600 MB/sec 12800 MB/sec
Texel Rate 18400 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 640(128x5) 160
Texture Mapping Units 32 8
Render Output Units 16 4
Bus Type GDDR3 GDDR3
Bus Width 256-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 956 million 370 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses 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 amount of texture map elements (texels) that are applied in one 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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