GeForce GTS 450 1GB vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which comes with core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon R9 M395X		125 Watts
	Difference: 19 Watts (18%)

Memory Bandwidth

In theory, the Radeon R9 M395X is 177% quicker than the GeForce GTS 450 1GB in general, because of its greater data rate. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 102272 (177%)

Texel Rate

The Radeon R9 M395X should be a lot (more or less 269%) better at anisotropic filtering than the GeForce GTS 450 1GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 67488 (269%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M395X is the winner, by a large margin. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 10608 (85%)

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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.