GeForce GTS 450 vs GeForce GTX 850M

Intro

Compare that to the GeForce GTX 850M, which comes with GPU clock speed of 876 MHz, and 2048 MB of DDR3 memory running at 1000 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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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

As far as performance goes, the GeForce GTS 450 should theoretically be much superior to 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 will be much (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 little bit (about 12%) more effective at full screen anti-aliasing than the GeForce GTS 450, and capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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