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GeForce GTS 450 vs Radeon HD 4750

Intro

The GeForce GTS 450 comes with a clock speed of 783 MHz and a GDDR5 memory speed of 902 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It features 192 SPUs, 32 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 4750, which has GPU core speed of 730 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

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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

Performance-wise, the GeForce GTS 450 should theoretically be a small bit superior to the Radeon HD 4750 in general. (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 bit (more or less 7%) more effective at 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

The GeForce GTS 450 will be just a bit (approximately 7%) faster with regards to FSAA than the Radeon HD 4750, and also will be capable of handling higher screen resolutions without slowing down too much. (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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max 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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