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Radeon HD 4350 vs Radeon HD 5830

Intro

The Radeon HD 4350 comes with clock speeds of 575 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 80(16x5) SPUs along with 8 TAUs and 4 ROPs.

Compare those specs to the Radeon HD 5830, which features clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1120(224x5) SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350		22 Watts
Radeon HD 5830		175 Watts
	Difference: 153 Watts (695%)

Memory Bandwidth

The Radeon HD 5830 should in theory be much faster than the Radeon HD 4350 in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 120000 (1500%)

Texel Rate

The Radeon HD 5830 will be quite a bit (approximately 874%) faster with regards to anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 40200 (874%)

Pixel Rate

The Radeon HD 5830 is much (more or less 457%) faster with regards to AA than the Radeon HD 4350, and will be capable of handling higher screen resolutions better. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 10500 (457%)

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 4350

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Radeon HD 5830

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Specifications

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Model	Radeon HD 4350	Radeon HD 5830
Manufacturer	AMD	AMD
Year	Sep 30, 2008	February 25, 2010
Code Name	RV710	Cypress LE
Memory	512 MB	1024 MB
Core Speed	575 MHz	800 MHz
Memory Speed	1000 MHz	4000 MHz
Power (Max TDP)	22 watts	175 watts
Bandwidth	8000 MB/sec	128000 MB/sec
Texel Rate	4600 Mtexels/sec	44800 Mtexels/sec
Pixel Rate	2300 Mpixels/sec	12800 Mpixels/sec
Unified Shaders	80(16x5)	1120(224x5)
Texture Mapping Units	8	56
Render Output Units	4	16
Bus Type	DDR2	GDDR5
Bus Width	64-bit	256-bit
Fab Process	55 nm	40 nm
Transistors	242 million	2154 million
Bus	PCIe 2.0 x16, PCI	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 max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory 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 card's memory bandwidth, the better 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 are applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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