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GeForce GTX 465 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 465 comes with a core clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 352 SPUs, 44 TAUs, and 32 ROPs.

Compare all that to the Radeon HD 4850 X2 512MB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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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

Theoretically, the Radeon HD 4850 X2 512MB should perform quite a bit 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 much (about 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 just a bit (approximately 3%) more effective at full screen anti-aliasing than the GeForce GTX 465, and also will be capable of handling higher screen resolutions without slowing down too much. (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

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.

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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher 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 amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's 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 output rate also depends 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 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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