GeForce GTS 450 1GB vs Radeon R9 380X

Intro

Compare all of that to the Radeon R9 380X, which has a clock speed of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also features a 256-bit bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon R9 380X		190 Watts
	Difference: 84 Watts (79%)

Memory Bandwidth

The Radeon R9 380X, in theory, should be a lot faster than the GeForce GTS 450 1GB in general. (explain)

Radeon R9 380X		182400 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 124672 (216%)

Texel Rate

The Radeon R9 380X is much (more or less 396%) faster with regards to texture filtering than the GeForce GTS 450 1GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 99104 (396%)

Pixel Rate

The Radeon R9 380X should be a lot (approximately 148%) more effective at FSAA than the GeForce GTS 450 1GB, and also will be able to handle higher resolutions better. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 18512 (148%)

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 moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the video 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 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.