GeForce GTS 250 1GB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which has core speeds of 607 MHz on the GPU, and 802 MHz on the 1024 MB of GDDR5 RAM. It features 352 SPUs along with 44 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
GeForce GTX 465		200 Watts
	Difference: 55 Watts (38%)

Memory Bandwidth

Performance-wise, the GeForce GTX 465 should in theory be much superior to the GeForce GTS 250 1GB overall. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 32192 (46%)

Texel Rate

The GeForce GTS 250 1GB should be a lot (about 77%) faster with regards to AF than the GeForce GTX 465. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 20524 (77%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 465 is superior to the GeForce GTS 250 1GB, by a large margin. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 7616 (64%)

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 maximum amount of data (in units of MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.