GeForce GTX 480 vs Radeon HD 4750

Intro

Compare all that to the Radeon HD 4750, which comes with a core clock frequency of 730 MHz and a GDDR5 memory speed of 800 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 480		250 Watts
	Difference: 175 Watts (233%)

Memory Bandwidth

The GeForce GTX 480 should theoretically be much faster than the Radeon HD 4750 overall. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 126208 (247%)

Texel Rate

The GeForce GTX 480 should be a lot (more or less 80%) better at AF than the Radeon HD 4750. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 18640 (80%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 480 is superior to the Radeon HD 4750, by a large margin. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 21920 (188%)

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 largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.