GeForce GTX 950 vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which has a clock speed of 730 MHz and a GDDR5 memory speed of 800 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 950		90 Watts
	Difference: 15 Watts (20%)

Memory Bandwidth

The GeForce GTX 950, in theory, should be much faster than the Radeon HD 4750 overall. (explain)

GeForce GTX 950		105728 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 54528 (107%)

Texel Rate

The GeForce GTX 950 is a lot (more or less 110%) faster with regards to AF than the Radeon HD 4750. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 25792 (110%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 950 is superior to the Radeon HD 4750, and very much so. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 21088 (181%)

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 data (measured in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.