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Radeon HD 4830 1GB vs Radeon HD 5450

Intro

The Radeon HD 4830 1GB comes with a GPU core clock speed of 575 MHz, and the 1024 MB of GDDR4 memory runs at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 5450, which comes with a clock speed of 650 MHz and a DDR3 memory speed of 800 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It is comprised of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation 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 be a lot faster than the Radeon HD 5450 in general. (explain)

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

Texel Rate

The Radeon HD 4830 1GB is quite a bit (more or less 254%) better at AF 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 should be much (approximately 254%) better at full screen anti-aliasing than the Radeon HD 5450, and should be capable of handling higher screen resolutions while still performing well. (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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

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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