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GeForce GTS 450 vs Radeon HD 3870 512MB

Intro

The GeForce GTS 450 makes use of a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 RAM runs at a speed of 902 MHz on this particular card. It features 192 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 3870 512MB, which has core clock speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the GeForce GTS 450 should be 0% quicker than the Radeon HD 3870 512MB in general, because of its greater bandwidth. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 128 (0%)

Texel Rate

The GeForce GTS 450 should be quite a bit (more or less 102%) more effective at AF than the Radeon HD 3870 512MB. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 12656 (102%)

Pixel Rate

The GeForce GTS 450 should be just a bit (about 1%) faster with regards to AA than the Radeon HD 3870 512MB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 128 (1%)

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 GTS 450

Amazon.com

Check prices at:

Radeon HD 3870 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 GTS 450 Radeon HD 3870 512MB
Manufacturer nVidia AMD
Year September 2010 Nov 19, 2007
Code Name GF106 RV670 XT
Memory 512 MB 512 MB
Core Speed 783 MHz 775 MHz
Memory Speed 3608 MHz 1800 MHz
Power (Max TDP) 106 watts 106 watts
Bandwidth 57728 MB/sec 57600 MB/sec
Texel Rate 25056 Mtexels/sec 12400 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 12400 Mpixels/sec
Unified Shaders 192 320(64x5)
Texture Mapping Units 32 16
Render Output Units 16 16
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 3870 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.

Comments

One Response to “GeForce GTS 450 vs Radeon HD 3870 512MB”
alal says:

I'm sorry but GTS 450 has only 512MB ?? not 1GB ??

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