GeForce GTX 465 vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which comes with core clock speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
GeForce GTX 465		200 Watts
	Difference: 125 Watts (167%)

Memory Bandwidth

Theoretically, the GeForce GTX 465 should be a small bit faster than the Radeon R9 M280X in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 14592 (17%)

Texel Rate

The Radeon R9 M280X should be much (approximately 89%) more effective at AF than the GeForce GTX 465. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 23692 (89%)

Pixel Rate

The GeForce GTX 465 should be a lot (approximately 35%) better at FSAA than the Radeon R9 M280X, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 5024 (35%)

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 (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.