GeForce GTS 250 1GB vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with a clock frequency of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M265X should theoretically perform a bit faster than the GeForce GTS 250 1GB in general. (explain)

Radeon R9 M265X		72000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The GeForce GTS 250 1GB should be much (approximately 105%) better at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 24232 (105%)

Pixel Rate

The GeForce GTS 250 1GB should be a lot (more or less 28%) better at anti-aliasing than the Radeon R9 M265X, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 2608 (28%)

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: Bandwidth is the largest amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory 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 better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends 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 maximum fill rate.