GeForce GT 320 vs GeForce GTS 250 1GB

Intro

Compare all of that to the GeForce GTS 250 1GB, which has a core clock frequency of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit memory bus, and makes use of a 65/55 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 102 Watts (237%)

Memory Bandwidth

In theory, the GeForce GTS 250 1GB will be 178% faster than the GeForce GT 320 overall, because of its greater data rate. (explain)

GeForce GTS 250 1GB		70400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 45120 (178%)

Texel Rate

The GeForce GTS 250 1GB will be much (approximately 264%) more effective at texture filtering than the GeForce GT 320. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 34272 (264%)

Pixel Rate

The GeForce GTS 250 1GB should be quite a bit (approximately 173%) faster with regards to anti-aliasing than the GeForce GT 320, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 7488 (173%)

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 data (measured in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core 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 most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.