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GeForce 8500 GT vs Radeon HD 5450


The GeForce 8500 GT comes with core speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 16 SPUs as well as 8 TAUs and 4 ROPs.

Compare that to the Radeon HD 5450, which comes with GPU clock speed of 650 MHz, and 512 MB of DDR3 RAM set to run at 800 MHz through a 64-bit bus. It also features 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce 8500 GT 45 Watts
Difference: 26 Watts (137%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 5450 is a lot (about 44%) more effective at AF than the GeForce 8500 GT. (explain)

Radeon HD 5450 5200 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 1600 (44%)

Pixel Rate

The Radeon HD 5450 is much (about 44%) faster with regards to full screen anti-aliasing than the GeForce 8500 GT, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 5450 2600 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 800 (44%)

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 8500 GT

Radeon HD 5450

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.


Display Specifications

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Model GeForce 8500 GT Radeon HD 5450
Manufacturer nVidia AMD
Year April 2007 February 4, 2010
Code Name G86 Cedar PRO
Memory 512 MB 512 MB
Core Speed 450 MHz 650 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 45 watts 19 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 3600 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 16 80(16x5)
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type DDR2 DDR3
Bus Width 128-bit 64-bit
Fab Process 80 nm 40 nm
Transistors 210 million 292 million
Bus PCIe x16, PCI, PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.


One Response to “GeForce 8500 GT vs Radeon HD 5450”
michel says:

humm nice to know that

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