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GeForce GTX 465 vs Radeon HD 4850 X2 1GB

Intro

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

Compare those specifications to the Radeon HD 4850 X2 1GB, which comes with a core clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465 200 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 1GB should be 24% quicker than the GeForce GTX 465 overall, due to its greater data rate. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 24512 (24%)

Texel Rate

The Radeon HD 4850 X2 1GB will be a lot (about 87%) faster with regards to AF than the GeForce GTX 465. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 23292 (87%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4850 X2 1GB is a better choice, not by a very large margin though. (explain)

Radeon HD 4850 X2 1GB 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 1GB

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 1GB
Manufacturer nVidia AMD
Year May 2010 Nov 7, 2008
Code Name GF100 R700
Memory 1024 MB 1024 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 information (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 465

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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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