GeForce 9800 GT 512MB vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which uses a 28 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory is set to run at a frequency of 1375 MHz on this particular model. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
Radeon R9 M295X		125 Watts
	Difference: 20 Watts (19%)

Memory Bandwidth

The Radeon R9 M295X, in theory, should be much faster than the GeForce 9800 GT 512MB in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 118400 (206%)

Texel Rate

The Radeon R9 M295X should be quite a bit (about 186%) faster with regards to AF than the GeForce 9800 GT 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 62400 (186%)

Pixel Rate

The Radeon R9 M295X should be a lot (about 150%) better at full screen anti-aliasing than the GeForce 9800 GT 512MB, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 14400 (150%)

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 data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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