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GeForce 8600 GS (OEM) vs Radeon HD 5450


Intro

The GeForce 8600 GS (OEM) has clock speeds of 540 MHz on the GPU, and 400 MHz on the 256 MB of DDR2 memory. It features 32 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare all of that to the Radeon HD 5450, which makes use of a 40 nm design. AMD has clocked the core frequency at 650 MHz. The DDR3 memory runs at a speed of 800 MHz on this model. It features 80(16x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce 8600 GS (OEM) 47 Watts
Difference: 28 Watts (147%)

Memory Bandwidth

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

Texel Rate

The GeForce 8600 GS (OEM) should be quite a bit (approximately 66%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce 8600 GS (OEM) 8640 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 3440 (66%)

Pixel Rate

The GeForce 8600 GS (OEM) will be quite a bit (about 66%) better at full screen anti-aliasing than the Radeon HD 5450, and able to handle higher resolutions without losing too much performance. (explain)

GeForce 8600 GS (OEM) 4320 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 1720 (66%)

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

GeForce 8600 GS (OEM)

Radeon HD 5450

Specifications

Display Specifications

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Model GeForce 8600 GS (OEM) Radeon HD 5450
Manufacturer nVidia AMD
Year April 2007 February 4, 2010
Code Name G84 Cedar PRO
Memory 256 MB 512 MB
Core Speed 540 MHz 650 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 47 watts 19 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 8640 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 32 80(16x5)
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR2 DDR3
Bus Width 128-bit 64-bit
Fab Process 80 nm 40 nm
Transistors 289 million 292 million
Bus PCIe x16 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 data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

GeForce 8600 GS (OEM)

Radeon HD 5450

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