GeForce GT 240 GDDR5 1GB vs GeForce GTS 250 512MB

Intro

Compare all that to the GeForce GTS 250 512MB, which has clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 75 Watts (107%)

Memory Bandwidth

In theory, the GeForce GTS 250 512MB should be much faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

GeForce GTS 250 512MB		70400 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 16000 (29%)

Texel Rate

The GeForce GTS 250 512MB is quite a bit (approximately 168%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 29632 (168%)

Pixel Rate

The GeForce GTS 250 512MB should be much (about 168%) better at AA than the GeForce GT 240 GDDR5 1GB, and will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 7408 (168%)

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 (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.