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GeForce GTS 450 vs Radeon HD 4730

Intro

The GeForce GTS 450 makes use of a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 memory runs at a speed of 902 MHz on this particular model. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 4730, which comes with core clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
Radeon HD 4730 140 Watts
Difference: 34 Watts (32%)

Memory Bandwidth

The GeForce GTS 450 should theoretically perform a little bit faster than the Radeon HD 4730 overall. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 4730 57600 MB/sec
Difference: 128 (0%)

Texel Rate

The GeForce GTS 450 is a small bit (about 12%) more effective at texture filtering than the Radeon HD 4730. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 2656 (12%)

Pixel Rate

The GeForce GTS 450 should be a lot (approximately 124%) faster with regards to AA than the Radeon HD 4730, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 6928 (124%)

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

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Radeon HD 4730

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 GTS 450 Radeon HD 4730
Manufacturer nVidia AMD
Year September 2010 Jun 8, 2009
Code Name GF106 RV770/CE
Memory 512 MB 512 MB
Core Speed 783 MHz 700 MHz
Memory Speed 3608 MHz 3600 MHz
Power (Max TDP) 106 watts 140 watts
Bandwidth 57728 MB/sec 57600 MB/sec
Texel Rate 25056 Mtexels/sec 22400 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 5600 Mpixels/sec
Unified Shaders 192 640(128x5)
Texture Mapping Units 32 32
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 1170 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 largest amount of data (in units of MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 4730

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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