GeForce GT 320 vs Radeon HD 4750

Intro

Compare that to the Radeon HD 4750, which features a core clock speed of 730 MHz and a GDDR5 memory speed of 800 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4750		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

Theoretically, the Radeon HD 4750 should be much faster than the GeForce GT 320 in general. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 25920 (103%)

Texel Rate

The Radeon HD 4750 is much (about 80%) faster with regards to AF than the GeForce GT 320. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 10400 (80%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4750 is the winner, by a large margin. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 7360 (170%)

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 data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.