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GeForce 8500 GT vs Radeon HD 5770

Intro

The GeForce 8500 GT comes with core clock speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 16 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5770, which makes use of a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this specific model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT 45 Watts
Radeon HD 5770 108 Watts
Difference: 63 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 will be 500% quicker than the GeForce 8500 GT overall, because of its greater data rate. (explain)

Radeon HD 5770 76800 MB/sec
GeForce 8500 GT 12800 MB/sec
Difference: 64000 (500%)

Texel Rate

The Radeon HD 5770 will be a lot (about 844%) faster with regards to texture filtering than the GeForce 8500 GT. (explain)

Radeon HD 5770 34000 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 30400 (844%)

Pixel Rate

The Radeon HD 5770 will be a lot (approximately 656%) faster with regards to full screen anti-aliasing than the GeForce 8500 GT, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 5770 13600 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 11800 (656%)

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

Radeon HD 5770

Amazon.com

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 5770
Manufacturer nVidia AMD
Year April 2007 October 13, 2009
Code Name G86 Juniper XT
Memory 512 MB 1024 MB
Core Speed 450 MHz 850 MHz
Memory Speed 800 MHz 4800 MHz
Power (Max TDP) 45 watts 108 watts
Bandwidth 12800 MB/sec 76800 MB/sec
Texel Rate 3600 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 16 800(160x5)
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 210 million 1040 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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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