GeForce 8800 GT 256MB vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has clocked the core frequency at 900 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this card. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce 8800 GT 256MB		105 Watts
	Difference: 55 Watts (110%)

Memory Bandwidth

The Radeon R9 M275X should theoretically be quite a bit faster than the GeForce 8800 GT 256MB overall. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce 8800 GT 256MB		44800 MB/sec
	Difference: 27200 (61%)

Texel Rate

The Radeon R9 M275X should be a small bit (about 7%) more effective at AF than the GeForce 8800 GT 256MB. (explain)

Radeon R9 M275X		36000 Mtexels/sec
GeForce 8800 GT 256MB		33600 Mtexels/sec
	Difference: 2400 (7%)

Pixel Rate

The Radeon R9 M275X should be quite a bit (more or less 50%) more effective at AA than the GeForce 8800 GT 256MB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce 8800 GT 256MB		9600 Mpixels/sec
	Difference: 4800 (50%)

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 maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.