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GeForce 8800 GTX vs Radeon R9 M275X

Intro

The GeForce 8800 GTX comes with a core clock speed of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 384-bit memory bus, and uses a 90 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 24 ROPs.

Compare that to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this particular model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X 50 Watts
GeForce 8800 GTX 155 Watts
Difference: 105 Watts (210%)

Memory Bandwidth

In theory, the GeForce 8800 GTX should perform just a bit faster than the Radeon R9 M275X overall. (explain)

GeForce 8800 GTX 86400 MB/sec
Radeon R9 M275X 72000 MB/sec
Difference: 14400 (20%)

Texel Rate

The GeForce 8800 GTX is a little bit (about 2%) better at AF than the Radeon R9 M275X. (explain)

GeForce 8800 GTX 36800 Mtexels/sec
Radeon R9 M275X 36000 Mtexels/sec
Difference: 800 (2%)

Pixel Rate

The Radeon R9 M275X will be a little bit (more or less 4%) better at full screen anti-aliasing than the GeForce 8800 GTX, and will be capable of handling higher resolutions better. (explain)

Radeon R9 M275X 14400 Mpixels/sec
GeForce 8800 GTX 13800 Mpixels/sec
Difference: 600 (4%)

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

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GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon R9 M275X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8800 GTX Radeon R9 M275X
Manufacturer nVidia AMD
Year Nov 2006 May 1 2014
Code Name G80 Venus XTX
Memory 768 MB 2048 MB
Core Speed 575 MHz 900 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 155 watts 50 watts
Bandwidth 86400 MB/sec 72000 MB/sec
Texel Rate 36800 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 128 640
Texture Mapping Units 64 40
Render Output Units 24 16
Bus Type GDDR3 GDDR5
Bus Width 384-bit 128-bit
Fab Process 90 nm 28 nm
Transistors 681 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon R9 M275X

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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