GeForce GTS 450 vs GeForce GTX 850M

Intro

Compare that to the GeForce GTX 850M, which comes with clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 850M		3340 points
GeForce GTS 450		1453 points
	Difference: 1887 (130%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTS 450		106 Watts
	Difference: 66 Watts (165%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 should perform a lot faster than the GeForce GTX 850M in general. (explain)

GeForce GTS 450		57728 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 25728 (80%)

Texel Rate

The GeForce GTX 850M should be quite a bit (approximately 40%) better at AF than the GeForce GTS 450. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 9984 (40%)

Pixel Rate

The GeForce GTX 850M should be a bit (approximately 12%) better at full screen anti-aliasing than the GeForce GTS 450, and should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 1488 (12%)

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 (measured in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.