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GeForce 8500 GT vs Radeon HD 5770

Intro

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

Compare that to the Radeon HD 5770, which features GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

(No game benchmarks for this combination yet.)

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

The Radeon HD 5770 should theoretically be quite a bit faster than the GeForce 8500 GT overall. (explain)

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

Texel Rate

The Radeon HD 5770 will be much (more or less 844%) faster with regards to anisotropic filtering than the GeForce 8500 GT. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5770 is the winner, by far. (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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce 8500 GT

Amazon.com

Other US-based stores

Radeon HD 5770

Amazon.com

Other US-based stores

Specifications

Model GeForce 8500 GT Radeon HD 5770
Manufacturer nVidia ATi
Year April 2007 October 13, 2009
Code Name G86 Juniper XT
Fab Process 80 nm 40 nm
Bus PCIe x16, PCI, PCIe x16 2.0 PCIe 2.1 x16
Memory 512 MB 1024 MB
Core Speed 450 MHz 850 MHz
Shader Speed 900 MHz (N/A) MHz
Memory Speed 400 MHz (800 MHz effective) 1200 MHz (4800 MHz effective)
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
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2
Power (Max TDP) 45 watts 108 watts
Shader Model 4.0 5.0
Bandwidth 12800 MB/sec 76800 MB/sec
Texel Rate 3600 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 13600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must 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, 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 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 graphics 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 video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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