GeForce GTS 150 vs GeForce GTS 450

Intro

Compare those specifications to the GeForce GTS 450, which has core speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce GTS 150		141 Watts
	Difference: 35 Watts (33%)

Memory Bandwidth

Performance-wise, the GeForce GTS 450 should theoretically be quite a bit better than the GeForce GTS 150 overall. (explain)

GeForce GTS 450		57728 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 25728 (80%)

Texel Rate

The GeForce GTS 150 should be much (about 89%) better at texture filtering than the GeForce GTS 450. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 22304 (89%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTS 450 is superior to the GeForce GTS 150, but it probably won't make a huge difference. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 688 (6%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, 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 amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core 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 lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.