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GeForce GTS 450 vs Radeon HD 6770

Intro

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

Compare all that to the Radeon HD 6770, which comes with GPU core speed of 900 MHz, and 512 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
Radeon HD 6770 108 Watts
Difference: 2 Watts (2%)

Memory Bandwidth

The Radeon HD 6770, in theory, should be a small bit faster than the GeForce GTS 450 in general. (explain)

Radeon HD 6770 67200 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 9472 (16%)

Texel Rate

The Radeon HD 6770 should be quite a bit (more or less 44%) better at anisotropic filtering than the GeForce GTS 450. (explain)

Radeon HD 6770 36000 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 10944 (44%)

Pixel Rate

The Radeon HD 6770 is a small bit (about 15%) faster with regards to anti-aliasing than the GeForce GTS 450, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6770 14400 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 1872 (15%)

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

Radeon HD 6770

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 Radeon HD 6770
Manufacturer nVidia AMD
Year September 2010 January 2011
Code Name GF106 Juniper XT
Memory 512 MB 512 MB
Core Speed 783 MHz 900 MHz
Memory Speed 3608 MHz 4200 MHz
Power (Max TDP) 106 watts 108 watts
Bandwidth 57728 MB/sec 67200 MB/sec
Texel Rate 25056 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 192 800
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1170 million 1040 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the 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 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Comments

3 Responses to “GeForce GTS 450 vs Radeon HD 6770”
pc gaming 1300lei - Page 3 - My Garage says:

[...] ok.. tine un q6600 si 9800 Gt. Hd 6770 comparat cu gts 450 (512 mb dar e valabil si pt 1gb). http://www.hwcompare.com/7617/geforc...adeon-hd-6770/ Carcasa o avea tabla subtire dar e bine ventilata si [...]

achizitionare placa video! - My Garage says:

[...] Daca as fi in situatia ta, as schimba sursa mai intai, macar cu aceasta. Apoi m-as gandi sa achizitionez placa video. [...]

Placa video recomandare + (probabil sursa) says:

[...] Multumesc. GeForce GTS 450 vs Radeon HD 6770 – Performance Comparison Benchmarks @ Hardware Compare dar aici vad ca 6770-ul e putin mai bun decat GTS450. M-ar interesa si ceva SH, dar sunt foarte [...]

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