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GeForce GTX 465 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 465 comes with a GPU core clock speed of 607 MHz, and the 1024 MB of GDDR5 memory runs at 802 MHz through a 256-bit bus. It also is comprised of 352 Stream Processors, 44 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon HD 4850 X2 512MB, which makes use of a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 memory runs at a frequency of 993 MHz on this particular model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465 200 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 512MB should perform much faster than the GeForce GTX 465 in general. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 24512 (24%)

Texel Rate

The Radeon HD 4850 X2 512MB should be a lot (more or less 87%) better at texture filtering than the GeForce GTX 465. (explain)

Radeon HD 4850 X2 512MB 50000 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 23292 (87%)

Pixel Rate

The Radeon HD 4850 X2 512MB should be a small bit (about 3%) more effective at AA than the GeForce GTX 465, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 4850 X2 512MB 20000 Mpixels/sec
GeForce GTX 465 19424 Mpixels/sec
Difference: 576 (3%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 465

Amazon.com

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Radeon HD 4850 X2 512MB

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 GTX 465 Radeon HD 4850 X2 512MB
Manufacturer nVidia AMD
Year May 2010 Nov 7, 2008
Code Name GF100 R700
Memory 1024 MB 512 MB (x2)
Core Speed 607 MHz 625 MHz (x2)
Memory Speed 3208 MHz 1986 MHz (x2)
Power (Max TDP) 200 watts 250 watts
Bandwidth 102592 MB/sec 127104 MB/sec
Texel Rate 26708 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 352 800(160x5) (x2)
Texture Mapping Units 44 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 3000 million 956 million
Bus PCIe x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

Display Prices

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GeForce GTX 465

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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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