GeForce 9500 GT 1GB GDDR3 vs GeForce GT 320

Intro

Compare all that to the GeForce GT 320, which features a clock frequency of 540 MHz and a GDDR3 memory frequency of 790 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 72 SPUs, 24 TAUs, 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

Theoretically speaking, the GeForce 9500 GT 1GB GDDR3 should perform 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 will be a lot (more or less 47%) better at anisotropic 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 should be a bit (more or less 2%) faster with regards to AA than the GeForce GT 320, and able to handle higher screen resolutions better. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.