GeForce GT 320 vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory runs at a speed of 1100 MHz on this specific card. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4670 1GB		70 Watts
	Difference: 27 Watts (63%)

Memory Bandwidth

In theory, the Radeon HD 4670 1GB will be 39% quicker than the GeForce GT 320 overall, due to its higher bandwidth. (explain)

Radeon HD 4670 1GB		35200 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 9920 (39%)

Texel Rate

The Radeon HD 4670 1GB will be a lot (approximately 85%) better at AF than the GeForce GT 320. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 11040 (85%)

Pixel Rate

The Radeon HD 4670 1GB is a lot (more or less 39%) more effective at full screen anti-aliasing than the GeForce GT 320, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 1680 (39%)

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 MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated 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 video 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 amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.