GeForce GTX 750 Ti vs Radeon HD 4890 1GB

Intro

Compare all that to the Radeon HD 4890 1GB, which features a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4890 1GB		190 Watts
	Difference: 130 Watts (217%)

Memory Bandwidth

The Radeon HD 4890 1GB, in theory, should be quite a bit faster than the GeForce GTX 750 Ti in general. (explain)

Radeon HD 4890 1GB		124800 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 38400 (44%)

Texel Rate

The GeForce GTX 750 Ti should be a small bit (approximately 2%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 800 (2%)

Pixel Rate

The GeForce GTX 750 Ti should be just a bit (more or less 2%) more effective at AA than the Radeon HD 4890 1GB, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 320 (2%)

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 largest amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video 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 number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.