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GeForce GTX 460 1GB vs Radeon HD 5870

Intro

The GeForce GTX 460 1GB comes with core speeds of 675 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 336 SPUs along with 56 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 5870, which uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 RAM is set to run at a frequency of 1200 MHz on this model. It features 1600(320x5) SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB 160 Watts
Radeon HD 5870 188 Watts
Difference: 28 Watts (18%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 will be 33% quicker than the GeForce GTX 460 1GB in general, because of its greater data rate. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 38400 (33%)

Texel Rate

The Radeon HD 5870 is much (approximately 80%) faster with regards to AF than the GeForce GTX 460 1GB. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 30200 (80%)

Pixel Rate

The Radeon HD 5870 should be much (more or less 26%) more effective at full screen anti-aliasing than the GeForce GTX 460 1GB, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 5600 (26%)

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 460 1GB

Amazon.com

Radeon HD 5870

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 460 1GB Radeon HD 5870
Manufacturer nVidia AMD
Year July 2010 September 23, 2009
Code Name GF104 Cypress XT
Memory 1024 MB 1024 MB
Core Speed 675 MHz 850 MHz
Memory Speed 3600 MHz 4800 MHz
Power (Max TDP) 160 watts 188 watts
Bandwidth 115200 MB/sec 153600 MB/sec
Texel Rate 37800 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 336 1600(320x5)
Texture Mapping Units 56 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1950 million 2154 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Comments

One Response to “GeForce GTX 460 1GB vs Radeon HD 5870”
diego says:

Afinal amigo qual a melhor???

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