GeForce GTX 550 Ti vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which uses a 40 nm design. AMD has clocked the core frequency at 730 MHz. The GDDR5 RAM is set to run at a frequency of 800 MHz on this specific model. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 41 Watts (55%)

Memory Bandwidth

In theory, the GeForce GTX 550 Ti will be 92% quicker than the Radeon HD 4750 overall, due to its higher bandwidth. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 47296 (92%)

Texel Rate

The GeForce GTX 550 Ti will be a lot (about 23%) faster with regards to texture filtering than the Radeon HD 4750. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 5440 (23%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 550 Ti is a better choice, and very much so. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 9920 (85%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.