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GeForce 9800 GTX vs Radeon HD 6450 (OEM)

Intro

The GeForce 9800 GTX has a GPU core speed of 675 MHz, and the 512 MB of GDDR3 RAM runs at 1100 MHz through a 256-bit bus. It also features 128 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory runs at a speed of 800 MHz on this specific card. It features 160 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
GeForce 9800 GTX 140 Watts
Difference: 109 Watts (352%)

Memory Bandwidth

In theory, the GeForce 9800 GTX is 450% faster than the Radeon HD 6450 (OEM) in general, due to its higher data rate. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 57600 (450%)

Texel Rate

The GeForce 9800 GTX will be quite a bit (more or less 764%) better at texture filtering than the Radeon HD 6450 (OEM). (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 38200 (764%)

Pixel Rate

The GeForce 9800 GTX is much (approximately 332%) more effective at AA than the Radeon HD 6450 (OEM), and also will be capable of handling higher resolutions better. (explain)

GeForce 9800 GTX 10800 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 8300 (332%)

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 9800 GTX

Amazon.com

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Radeon HD 6450 (OEM)

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 9800 GTX Radeon HD 6450 (OEM)
Manufacturer nVidia AMD
Year April 2008 February 2011
Code Name G92 Caicos
Memory 512 MB 512 MB
Core Speed 675 MHz 625 MHz
Memory Speed 2200 MHz 1600 MHz
Power (Max TDP) 140 watts 31 watts
Bandwidth 70400 MB/sec 12800 MB/sec
Texel Rate 43200 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 128 160
Texture Mapping Units 64 8
Render Output Units 16 4
Bus Type GDDR3 GDDR3
Bus Width 256-bit 64-bit
Fab Process 65 nm 40 nm
Transistors 754 million 370 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 9800 GTX

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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