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GeForce GTS 450 1GB vs Radeon HD 7770

Intro

The GeForce GTS 450 1GB makes use of a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 RAM is set to run at a frequency of 902 MHz on this specific model. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon HD 7770, which comes with a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce GTS 450 1GB 106 Watts
Difference: 26 Watts (33%)

Memory Bandwidth

Performance-wise, the Radeon HD 7770 should theoretically be a lot better than the GeForce GTS 450 1GB overall. (explain)

Radeon HD 7770 72000 MB/sec
GeForce GTS 450 1GB 57728 MB/sec
Difference: 14272 (25%)

Texel Rate

The Radeon HD 7770 will be quite a bit (about 60%) better at AF than the GeForce GTS 450 1GB. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce GTS 450 1GB 25056 Mtexels/sec
Difference: 14944 (60%)

Pixel Rate

The Radeon HD 7770 is a lot (about 28%) more effective at FSAA than the GeForce GTS 450 1GB, and also able to handle higher resolutions more effectively. (explain)

Radeon HD 7770 16000 Mpixels/sec
GeForce GTS 450 1GB 12528 Mpixels/sec
Difference: 3472 (28%)

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 1GB

Amazon.com

Radeon HD 7770

Amazon.com

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 1GB Radeon HD 7770
Manufacturer nVidia AMD
Year September 2010 February 2012
Code Name GF106 Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 783 MHz 1000 MHz
Memory Speed 3608 MHz 4500 MHz
Power (Max TDP) 106 watts 80 watts
Bandwidth 57728 MB/sec 72000 MB/sec
Texel Rate 25056 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 192 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 1500 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that 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 amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 450 1GB

Amazon.com

Radeon HD 7770

Amazon.com

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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