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GeForce GTX 465 vs Radeon HD 4870 1GB

Intro

The GeForce GTX 465 comes with a clock frequency of 607 MHz and a GDDR5 memory speed of 802 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 352 SPUs, 44 Texture Address Units, and 32 ROPs.

Compare that to the Radeon HD 4870 1GB, which has core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB 150 Watts
GeForce GTX 465 200 Watts
Difference: 50 Watts (33%)

Memory Bandwidth

In theory, the Radeon HD 4870 1GB should be a bit faster than the GeForce GTX 465 overall. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 12608 (12%)

Texel Rate

The Radeon HD 4870 1GB will be a bit (approximately 12%) faster with regards to AF than the GeForce GTX 465. (explain)

Radeon HD 4870 1GB 30000 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 3292 (12%)

Pixel Rate

The GeForce GTX 465 should be a lot (more or less 62%) more effective at anti-aliasing than the Radeon HD 4870 1GB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 465 19424 Mpixels/sec
Radeon HD 4870 1GB 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 4870 1GB

Amazon.com

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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 4870 1GB
Manufacturer nVidia AMD
Year May 2010 Jun 25, 2008
Code Name GF100 RV770 XT
Memory 1024 MB 1024 MB
Core Speed 607 MHz 750 MHz
Memory Speed 3208 MHz 3600 MHz
Power (Max TDP) 200 watts 150 watts
Bandwidth 102592 MB/sec 115200 MB/sec
Texel Rate 26708 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 352 800(160x5)
Texture Mapping Units 44 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 3000 million 956 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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 465

Amazon.com

Check prices at:

Radeon HD 4870 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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