GeForce GTX 465 vs Radeon HD 4550 512MB

Intro

Compare those specs to the Radeon HD 4550 512MB, which makes use of a 55 nm design. AMD has clocked the core frequency at 600 MHz. The GDDR3 RAM runs at a frequency of 800 MHz on this specific model. It features 80(16x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
GeForce GTX 465		200 Watts
	Difference: 175 Watts (700%)

Memory Bandwidth

The GeForce GTX 465 should theoretically perform much faster than the Radeon HD 4550 512MB in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 89792 (702%)

Texel Rate

The GeForce GTX 465 will be quite a bit (approximately 456%) more effective at anisotropic filtering than the Radeon HD 4550 512MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 21908 (456%)

Pixel Rate

The GeForce GTX 465 should be a lot (approximately 709%) better at full screen anti-aliasing than the Radeon HD 4550 512MB, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 17024 (709%)

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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that can be processed in one second. This is worked out 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 video 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 can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.