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Radeon HD 4830 1GB vs Radeon HD 5450

Intro

The Radeon HD 4830 1GB has clock speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 memory. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 5450, which makes use of a 40 nm design. AMD has set the core frequency at 650 MHz. The DDR3 RAM is set to run at a frequency of 800 MHz on this particular model. It features 80(16x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 76 Watts (400%)

Memory Bandwidth

In theory, the Radeon HD 4830 1GB should perform a lot faster than the Radeon HD 5450 overall. (explain)

Radeon HD 4830 1GB 57600 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 44800 (350%)

Texel Rate

The Radeon HD 4830 1GB should be a lot (about 254%) better at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 4830 1GB 18400 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 13200 (254%)

Pixel Rate

The Radeon HD 4830 1GB is a lot (more or less 254%) better at full screen anti-aliasing than the Radeon HD 5450, and able to handle higher resolutions more effectively. (explain)

Radeon HD 4830 1GB 9200 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 6600 (254%)

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 1GB

Amazon.com

Check prices at:

Radeon HD 5450

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 1GB Radeon HD 5450
Manufacturer AMD AMD
Year Oct 21, 2008 February 4, 2010
Code Name RV770 LE Cedar PRO
Memory 1024 MB 512 MB
Core Speed 575 MHz 650 MHz
Memory Speed 1800 MHz 1600 MHz
Power (Max TDP) 95 watts 19 watts
Bandwidth 57600 MB/sec 12800 MB/sec
Texel Rate 18400 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 640(128x5) 80(16x5)
Texture Mapping Units 32 8
Render Output Units 16 4
Bus Type GDDR4 DDR3
Bus Width 256-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 956 million 292 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 (counted in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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Radeon HD 4830 1GB

Amazon.com

Check prices at:

Radeon HD 5450

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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