GeForce GTX 750 Ti vs Radeon HD 4850 1GB

Intro

Compare all of that to the Radeon HD 4850 1GB, which comes with a clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

The GeForce GTX 750 Ti should in theory perform quite a bit faster than the Radeon HD 4850 1GB overall. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 22848 (36%)

Texel Rate

The GeForce GTX 750 Ti will be a lot (more or less 63%) better at AF than the Radeon HD 4850 1GB. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 15800 (63%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 750 Ti is the winner, by a large margin. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 6320 (63%)

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 across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, 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 the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few 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.