GeForce GT 340 vs GeForce GTS 250 512MB

Intro

Compare all that to the GeForce GTS 250 512MB, which features clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 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 340		69 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 76 Watts (110%)

Memory Bandwidth

The GeForce GTS 250 512MB should theoretically perform quite a bit faster than the GeForce GT 340 overall. (explain)

GeForce GTS 250 512MB		70400 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 16000 (29%)

Texel Rate

The GeForce GTS 250 512MB will be quite a bit (more or less 168%) faster with regards to anisotropic filtering than the GeForce GT 340. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 29632 (168%)

Pixel Rate

The GeForce GTS 250 512MB will be quite a bit (more or less 168%) faster with regards to full screen anti-aliasing than the GeForce GT 340, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
GeForce GT 340		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: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 are processed 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 this number, 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 that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. 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 output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.