GeForce GTX 465 vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which makes use of a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory is set to run at a frequency of 1375 MHz on this specific model. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

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

As far as performance goes, the GeForce GTX 465 should theoretically be a bit superior to 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 is a lot (approximately 89%) better at texture filtering 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 (about 35%) faster with regards to full screen anti-aliasing than the Radeon R9 M280X, and also should be able to handle higher resolutions while still performing well. (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 maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.

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