GeForce GT 320 vs GeForce GTX 280

Intro

Compare all of that to the GeForce GTX 280, which makes use of a 65 nm design. nVidia has clocked the core frequency at 602 MHz. The GDDR3 memory is set to run at a frequency of 1107 MHz on this specific card. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 280		236 Watts
	Difference: 193 Watts (449%)

Memory Bandwidth

In theory, the GeForce GTX 280 will be 461% faster than the GeForce GT 320 overall, due to its higher data rate. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 116416 (461%)

Texel Rate

The GeForce GTX 280 will be quite a bit (more or less 272%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 280		48160 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 35200 (272%)

Pixel Rate

The GeForce GTX 280 should be much (approximately 346%) more effective at full screen anti-aliasing than the GeForce GT 320, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 280		19264 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 14944 (346%)

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 transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.