GeForce GT 450 (OEM) vs GeForce GTX 275

Intro

Compare all that to the GeForce GTX 275, which comes with GPU core speed of 633 MHz, and 896 MB of GDDR3 memory set to run at 1134 MHz through a 448-bit bus. It also is made up of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce GTX 275		219 Watts
	Difference: 113 Watts (107%)

Memory Bandwidth

In theory, the GeForce GTX 275 is 32% quicker than the GeForce GT 450 (OEM) in general, due to its higher bandwidth. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 31008 (32%)

Texel Rate

The GeForce GTX 275 will be a lot (about 167%) better at texture filtering than the GeForce GT 450 (OEM). (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 31680 (167%)

Pixel Rate

The GeForce GT 450 (OEM) will be a bit (approximately 7%) faster with regards to full screen anti-aliasing than the GeForce GTX 275, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 1236 (7%)

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 largest amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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