GeForce 9500 GT 512MB GDDR3 vs GeForce GT 315

Intro

Compare all that to the GeForce GT 315, which makes use of a 40 nm design. nVidia has clocked the core speed at 625 MHz. The DDR3 memory runs at a frequency of 790 MHz on this particular model. It features 48 SPUs along with 16 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 512MB GDDR3		50 Watts
GeForce GT 315		52 Watts
	Difference: 2 Watts (4%)

Memory Bandwidth

The GeForce 9500 GT 512MB GDDR3 should theoretically perform a small bit faster than the GeForce GT 315 overall. (explain)

GeForce 9500 GT 512MB GDDR3		25600 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 320 (1%)

Texel Rate

The GeForce GT 315 is a little bit (about 14%) faster with regards to anisotropic filtering than the GeForce 9500 GT 512MB GDDR3. (explain)

GeForce GT 315		10000 Mtexels/sec
GeForce 9500 GT 512MB GDDR3		8800 Mtexels/sec
	Difference: 1200 (14%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 315 is superior to the GeForce 9500 GT 512MB GDDR3, though not by far. (explain)

GeForce GT 315		5000 Mpixels/sec
GeForce 9500 GT 512MB GDDR3		4400 Mpixels/sec
	Difference: 600 (14%)

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 (counted in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels 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 amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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 maximum fill rate.