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GeForce 8600 GT 512MB GDDR3 vs Radeon R9 M275X

Intro

The GeForce 8600 GT 512MB GDDR3 comes with core clock speeds of 540 MHz on the GPU, and 700 MHz on the 512 MB of GDDR3 RAM. It features 32 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

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

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3 47 Watts
Radeon R9 M275X 50 Watts
Difference: 3 Watts (6%)

Memory Bandwidth

Performance-wise, the Radeon R9 M275X should theoretically be a lot superior to the GeForce 8600 GT 512MB GDDR3 overall. (explain)

Radeon R9 M275X 72000 MB/sec
GeForce 8600 GT 512MB GDDR3 22400 MB/sec
Difference: 49600 (221%)

Texel Rate

The Radeon R9 M275X will be quite a bit (about 317%) faster with regards to AF than the GeForce 8600 GT 512MB GDDR3. (explain)

Radeon R9 M275X 36000 Mtexels/sec
GeForce 8600 GT 512MB GDDR3 8640 Mtexels/sec
Difference: 27360 (317%)

Pixel Rate

The Radeon R9 M275X will be quite a bit (about 233%) better at FSAA than the GeForce 8600 GT 512MB GDDR3, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M275X 14400 Mpixels/sec
GeForce 8600 GT 512MB GDDR3 4320 Mpixels/sec
Difference: 10080 (233%)

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 8600 GT 512MB GDDR3

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 8600 GT 512MB GDDR3 Radeon R9 M275X
Manufacturer nVidia AMD
Year April 2007 May 1 2014
Code Name G84 Venus XTX
Memory 512 MB 2048 MB
Core Speed 540 MHz 900 MHz
Memory Speed 1400 MHz 4500 MHz
Power (Max TDP) 47 watts 50 watts
Bandwidth 22400 MB/sec 72000 MB/sec
Texel Rate 8640 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 32 640
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 289 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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 per second. This figure is calculated by multiplying the total texture units 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB GDDR3

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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