Radeon HD 4350 vs Radeon HD 5450

Intro

Compare all of that to the Radeon HD 5450, which comes with GPU core speed of 650 MHz, and 512 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 4350		22 Watts
	Difference: 3 Watts (16%)

Memory Bandwidth

Performance-wise, the Radeon HD 5450 should theoretically be much better than the Radeon HD 4350 overall. (explain)

Radeon HD 5450		12800 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 4800 (60%)

Texel Rate

The Radeon HD 5450 will be a small bit (about 13%) faster with regards to texture filtering than the Radeon HD 4350. (explain)

Radeon HD 5450		5200 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 600 (13%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5450 is the winner, though only just barely. (explain)

Radeon HD 5450		2600 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 300 (13%)

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

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.