GeForce 9500 GT 1GB GDDR3 vs GeForce GT 320

Intro

Compare those specifications to the GeForce GT 320, which features a GPU core clock speed of 540 MHz, and 1024 MB of GDDR3 memory set to run at 790 MHz through a 128-bit bus. It also is comprised of 72 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce 9500 GT 1GB GDDR3		50 Watts
	Difference: 7 Watts (16%)

Memory Bandwidth

The GeForce 9500 GT 1GB GDDR3 should theoretically be just a bit faster than the GeForce GT 320 in general. (explain)

GeForce 9500 GT 1GB GDDR3		25600 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 320 (1%)

Texel Rate

The GeForce GT 320 is a lot (more or less 47%) more effective at texture filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

GeForce GT 320		12960 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 4160 (47%)

Pixel Rate

The GeForce 9500 GT 1GB GDDR3 will be just a bit (more or less 2%) more effective at anti-aliasing than the GeForce GT 320, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 80 (2%)

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core 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 many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.