GeForce GTX 650 vs Radeon HD 4550 256MB

Intro

Compare all of that to the Radeon HD 4550 256MB, which makes use of a 55 nm design. AMD has set the core frequency at 600 MHz. The DDR3 memory runs at a frequency of 800 MHz on this specific card. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB		25 Watts
GeForce GTX 650		64 Watts
	Difference: 39 Watts (156%)

Memory Bandwidth

The GeForce GTX 650, in theory, should be much faster than the Radeon HD 4550 256MB in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 67200 (525%)

Texel Rate

The GeForce GTX 650 will be quite a bit (approximately 605%) better at texture filtering than the Radeon HD 4550 256MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 29056 (605%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 650 is a better choice, by far. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 14528 (605%)

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 maximum amount of data (measured in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.