GeForce GT 430 1GB vs Radeon HD 4770

Intro

Compare those specifications to the Radeon HD 4770, which uses a 40 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM is set to run at a frequency of 800 MHz on this particular card. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 1GB		60 Watts
Radeon HD 4770		80 Watts
	Difference: 20 Watts (33%)

Memory Bandwidth

In theory, the Radeon HD 4770 will be 78% faster than the GeForce GT 430 1GB overall, because of its greater data rate. (explain)

Radeon HD 4770		51200 MB/sec
GeForce GT 430 1GB		28800 MB/sec
	Difference: 22400 (78%)

Texel Rate

The Radeon HD 4770 should be much (more or less 114%) more effective at anisotropic filtering than the GeForce GT 430 1GB. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 12800 (114%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4770 is the winner, by a large margin. (explain)

Radeon HD 4770		12000 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 9200 (329%)

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 information (in units of MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.