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GeForce GTX 260 vs Radeon HD 6450 (OEM)

Intro

The GeForce GTX 260 uses a 65 nm design. nVidia has set the core frequency at 576 MHz. The GDDR3 RAM works at a frequency of 999 MHz on this particular model. It features 192 SPUs along with 64 TAUs and 28 Rasterization Operator Units.

Compare that to the Radeon HD 6450 (OEM), which features core speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
GeForce GTX 260 182 Watts
Difference: 151 Watts (487%)

Memory Bandwidth

In theory, the GeForce GTX 260 is 774% faster than the Radeon HD 6450 (OEM) overall, because of its greater bandwidth. (explain)

GeForce GTX 260 111888 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 99088 (774%)

Texel Rate

The GeForce GTX 260 should be quite a bit (more or less 637%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

GeForce GTX 260 36864 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 31864 (637%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 260 is superior to the Radeon HD 6450 (OEM), and very much so. (explain)

GeForce GTX 260 16128 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 13628 (545%)

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

Display Prices

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GeForce GTX 260

Amazon.com

Radeon HD 6450 (OEM)

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

Display Specifications

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Model GeForce GTX 260 Radeon HD 6450 (OEM)
Manufacturer nVidia AMD
Year June 16, 2008 February 2011
Code Name G200 Caicos
Fab Process 65 nm 40 nm
Bus PCIe x16 2.0 PCIe 2.1 x16
Memory 896 MB 512 MB
Core Speed 576 MHz 625 MHz
Shader Speed 1242 MHz (N/A) MHz
Memory Speed 1998 MHz 1600 MHz
Unified Shaders 192 160
Texture Mapping Units 64 8
Render Output Units 28 4
Bus Type GDDR3 GDDR3
Bus Width 448-bit 64-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1
Power (Max TDP) 182 watts 31 watts
Shader Model 4.0 5.0
Bandwidth 111888 MB/sec 12800 MB/sec
Texel Rate 36864 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 2500 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If 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 applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 ability to reach the max fill rate.

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