Geforce GTX 780 vs Radeon HD 4550 256MB

Intro

Compare all that to the Radeon HD 4550 256MB, which features a core clock speed of 600 MHz and a DDR3 memory frequency of 800 MHz. It also makes use of a 64-bit memory bus, and uses a 55 nm design. It is made up of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB		25 Watts
Geforce GTX 780		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

The Geforce GTX 780 should theoretically perform a lot faster than the Radeon HD 4550 256MB in general. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 275584 (2153%)

Texel Rate

The Geforce GTX 780 is a lot (approximately 3352%) faster with regards to anisotropic filtering than the Radeon HD 4550 256MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 160896 (3352%)

Pixel Rate

The Geforce GTX 780 is a lot (more or less 1626%) faster with regards to full screen anti-aliasing than the Radeon HD 4550 256MB, and should be capable of handling higher resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 39024 (1626%)

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 (counted in megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high 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 number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.