GeForce GTX 750 Ti vs Radeon HD 4850 512MB

Intro

Compare all that to the Radeon HD 4850 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 RAM works at a frequency of 993 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTX 750 Ti should perform quite a bit faster than the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 22848 (36%)

Texel Rate

The GeForce GTX 750 Ti should be a lot (about 63%) more effective at texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 15800 (63%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 750 Ti is the winner, and very much so. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4850 512MB		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 maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.