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GeForce GTS 450 1GB vs Radeon HD 7770

Intro

The GeForce GTS 450 1GB uses a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 memory is set to run at a frequency of 902 MHz on this card. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 7770, which comes with GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 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

The Radeon HD 7770, in theory, should be quite a bit faster 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 should be quite a bit (about 60%) more effective at texture filtering 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 quite a bit (approximately 28%) more effective at anti-aliasing than the GeForce GTS 450 1GB, and also will be capable of handling higher screen resolutions better. (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

Check prices at:

Radeon HD 7770

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 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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 7770

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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