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GeForce 8500 GT vs Radeon HD 4550 256MB

Intro

The GeForce 8500 GT features a clock frequency of 450 MHz and a DDR2 memory frequency of 400 MHz. It also uses a 128-bit memory bus, and makes use of a 80 nm design. It is made up of 16 SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare all that to the Radeon HD 4550 256MB, which comes with a GPU core clock speed of 600 MHz, and 256 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB 25 Watts
GeForce 8500 GT 45 Watts
Difference: 20 Watts (80%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 4550 256MB will be quite a bit (more or less 33%) more effective at AF than the GeForce 8500 GT. (explain)

Radeon HD 4550 256MB 4800 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 1200 (33%)

Pixel Rate

The Radeon HD 4550 256MB should be much (about 33%) faster with regards to AA than the GeForce 8500 GT, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 4550 256MB 2400 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 600 (33%)

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

Amazon.com

Check prices at:

Radeon HD 4550 256MB

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 8500 GT Radeon HD 4550 256MB
Manufacturer nVidia AMD
Year April 2007 Sep 30, 2008
Code Name G86 RV710
Memory 512 MB 256 MB
Core Speed 450 MHz 600 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 45 watts 25 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 3600 Mtexels/sec 4800 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 2400 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 55 nm
Transistors 210 million 242 million
Bus PCIe x16, PCI, PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics 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 clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few 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 8500 GT

Amazon.com

Check prices at:

Radeon HD 4550 256MB

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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