GeForce GTX 750 vs Radeon HD 4870 1GB

Intro

Compare those specifications to the Radeon HD 4870 1GB, which comes with core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 4870 1GB		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 1GB should theoretically be quite a bit superior to the GeForce GTX 750 overall. (explain)

Radeon HD 4870 1GB		115200 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 35200 (44%)

Texel Rate

The GeForce GTX 750 should be just a bit (approximately 9%) more effective at AF than the Radeon HD 4870 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 2640 (9%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 750 is a better choice, and very much so. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 4320 (36%)

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 information (measured in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.