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GeForce GTS 450 vs Radeon HD 4750

Intro

The GeForce GTS 450 has a core clock speed of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 4750, which comes with a core clock frequency of 730 MHz and a GDDR5 memory speed of 800 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
GeForce GTS 450 106 Watts
Difference: 31 Watts (41%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 will be 13% quicker than the Radeon HD 4750 overall, due to its higher bandwidth. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 6528 (13%)

Texel Rate

The GeForce GTS 450 should be a small bit (about 7%) faster with regards to anisotropic filtering than the Radeon HD 4750. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 1696 (7%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTS 450 is a better choice, not by a very large margin though. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4750 11680 Mpixels/sec
Difference: 848 (7%)

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 4750

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 4750
Manufacturer nVidia AMD
Year September 2010
Code Name GF106 RV740
Memory 512 MB 512 MB
Core Speed 783 MHz 730 MHz
Memory Speed 3608 MHz 3200 MHz
Power (Max TDP) 106 watts 75 watts
Bandwidth 57728 MB/sec 51200 MB/sec
Texel Rate 25056 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 192 640(128x5)
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1170 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 megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory 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 4750

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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