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GeForce GTX 260 vs Radeon HD 6450 (OEM)

Intro

The GeForce GTX 260 comes with clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 RAM. It features 192 SPUs as well as 64 TAUs and 28 Rasterization Operator Units.

Compare that to the Radeon HD 6450 (OEM), which makes use of a 40 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 RAM works at a speed of 800 MHz on this model. It features 160 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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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

Theoretically speaking, the GeForce GTX 260 should be quite a bit faster than the Radeon HD 6450 (OEM) overall. (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 a lot (about 637%) better at AF 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 using high levels of AA is important to you, then the GeForce GTX 260 is a better choice, by a large margin. (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

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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

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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
Memory 896 MB 512 MB
Core Speed 576 MHz 625 MHz
Memory Speed 1998 MHz 1600 MHz
Power (Max TDP) 182 watts 31 watts
Bandwidth 111888 MB/sec 12800 MB/sec
Texel Rate 36864 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 192 160
Texture Mapping Units 64 8
Render Output Units 28 4
Bus Type GDDR3 GDDR3
Bus Width 448-bit 64-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 370 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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

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