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GeForce 8600 GT 256MB DDR2 vs Radeon HD 6450 (OEM)

Intro

The GeForce 8600 GT 256MB DDR2 has clock speeds of 540 MHz on the GPU, and 400 MHz on the 256 MB of DDR2 RAM. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.

Compare all that to the Radeon HD 6450 (OEM), which comes with a clock speed of 625 MHz and a GDDR3 memory speed of 800 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It features 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
GeForce 8600 GT 256MB DDR2 47 Watts
Difference: 16 Watts (52%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The GeForce 8600 GT 256MB DDR2 will be much (more or less 73%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

GeForce 8600 GT 256MB DDR2 8640 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 3640 (73%)

Pixel Rate

The GeForce 8600 GT 256MB DDR2 is quite a bit (about 73%) faster with regards to full screen anti-aliasing than the Radeon HD 6450 (OEM), and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8600 GT 256MB DDR2 4320 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 1820 (73%)

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 256MB DDR2

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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 256MB DDR2 Radeon HD 6450 (OEM)
Manufacturer nVidia AMD
Year April 2007 February 2011
Code Name G84 Caicos
Memory 256 MB 512 MB
Core Speed 540 MHz 625 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 47 watts 31 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 8640 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 32 160
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR2 GDDR3
Bus Width 128-bit 64-bit
Fab Process 80 nm 40 nm
Transistors 289 million 370 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 256MB DDR2

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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