GeForce GTS 250 1GB vs GeForce GTX 650 Ti

Intro

Compare those specifications to the GeForce GTX 650 Ti, which comes with core speeds of 928 MHz on the GPU, and 1350 MHz on the 1024 MB of GDDR5 RAM. It features 768 SPUs along with 64 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

In theory, the GeForce GTX 650 Ti should be 23% faster than the GeForce GTS 250 1GB overall, because of its greater data rate. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 16000 (23%)

Texel Rate

The GeForce GTX 650 Ti is a lot (about 26%) faster with regards to texture filtering than the GeForce GTS 250 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 12160 (26%)

Pixel Rate

The GeForce GTX 650 Ti is quite a bit (approximately 26%) better at full screen anti-aliasing than the GeForce GTS 250 1GB, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 3040 (26%)

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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.