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GeForce GTS 450 vs Radeon HD 4770

Intro

The GeForce GTS 450 uses a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 RAM is set to run at a speed of 902 MHz on this particular card. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 4770, which has a core clock speed of 750 MHz and a GDDR5 memory speed of 800 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
GeForce GTS 450 106 Watts
Difference: 26 Watts (33%)

Memory Bandwidth

In theory, the GeForce GTS 450 is 13% faster than the Radeon HD 4770 in general, due to its higher bandwidth. (explain)

GeForce GTS 450 57728 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 6528 (13%)

Texel Rate

The GeForce GTS 450 is a small bit (more or less 4%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4770 24000 Mtexels/sec
Difference: 1056 (4%)

Pixel Rate

The GeForce GTS 450 is a little bit (more or less 4%) more effective at AA than the Radeon HD 4770, and also should be capable of handling higher screen resolutions better. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4770 12000 Mpixels/sec
Difference: 528 (4%)

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 4770

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 4770
Manufacturer nVidia AMD
Year September 2010 Apr 28, 2009
Code Name GF106 RV740
Memory 512 MB 512 MB
Core Speed 783 MHz 750 MHz
Memory Speed 3608 MHz 3200 MHz
Power (Max TDP) 106 watts 80 watts
Bandwidth 57728 MB/sec 51200 MB/sec
Texel Rate 25056 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 12000 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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its 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 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 4770

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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