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GeForce 9800 GTX vs Radeon HD 5550


Intro

The GeForce 9800 GTX uses a 65 nm design. nVidia has clocked the core frequency at 675 MHz. The GDDR3 memory is set to run at a speed of 1100 MHz on this specific model. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 5550, which features a core clock frequency of 550 MHz and a DDR2 memory speed of 400 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9800 GTX should in theory perform a lot faster than the Radeon HD 5550 overall. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 5550 12800 MB/sec
Difference: 57600 (450%)

Texel Rate

The GeForce 9800 GTX should be quite a bit (approximately 391%) faster with regards to AF than the Radeon HD 5550. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 5550 8800 Mtexels/sec
Difference: 34400 (391%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GTX is superior to the Radeon HD 5550, by a large margin. (explain)

GeForce 9800 GTX 10800 Mpixels/sec
Radeon HD 5550 4400 Mpixels/sec
Difference: 6400 (145%)

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 9800 GTX

Radeon HD 5550

Specifications

Display Specifications

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Model GeForce 9800 GTX Radeon HD 5550
Manufacturer nVidia AMD
Year April 2008 February 9, 2010
Code Name G92 Redwood LE
Memory 512 MB 512 MB
Core Speed 675 MHz 550 MHz
Memory Speed 2200 MHz 800 MHz
Power (Max TDP) 140 watts (Unknown) watts
Bandwidth 70400 MB/sec 12800 MB/sec
Texel Rate 43200 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 128 320(64x5)
Texture Mapping Units 64 16
Render Output Units 16 8
Bus Type GDDR3 DDR2
Bus Width 256-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 627 million
Bus 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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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.

GeForce 9800 GTX

Radeon HD 5550

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