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GeForce GTX 465 vs Radeon HD 4770

Intro

The GeForce GTX 465 features a GPU core clock speed of 607 MHz, and the 1024 MB of GDDR5 memory is set to run at 802 MHz through a 256-bit bus. It also features 352 Stream Processors, 44 TAUs, and 32 ROPs.

Compare all of that to the Radeon HD 4770, which comes with core clock speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
GeForce GTX 465 200 Watts
Difference: 120 Watts (150%)

Memory Bandwidth

The GeForce GTX 465 should in theory perform much faster than the Radeon HD 4770 in general. (explain)

GeForce GTX 465 102592 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 51392 (100%)

Texel Rate

The GeForce GTX 465 will be a little bit (about 11%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

GeForce GTX 465 26708 Mtexels/sec
Radeon HD 4770 24000 Mtexels/sec
Difference: 2708 (11%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 465 is the winner, and very much so. (explain)

GeForce GTX 465 19424 Mpixels/sec
Radeon HD 4770 12000 Mpixels/sec
Difference: 7424 (62%)

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 465

Amazon.com

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Radeon HD 4770

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 4770
Manufacturer nVidia AMD
Year May 2010 Apr 28, 2009
Code Name GF100 RV740
Memory 1024 MB 512 MB
Core Speed 607 MHz 750 MHz
Memory Speed 3208 MHz 3200 MHz
Power (Max TDP) 200 watts 80 watts
Bandwidth 102592 MB/sec 51200 MB/sec
Texel Rate 26708 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 352 640(128x5)
Texture Mapping Units 44 32
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 826 million
Bus PCIe x16 PCIe 2.0 x16
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 (measured in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 figure 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core 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 fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 465

Amazon.com

Check prices at:

Radeon HD 4770

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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