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GeForce GTS 450 vs Radeon HD 6770

Intro

The GeForce GTS 450 comes with core clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 6770, which features clock speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

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

Performance-wise, the Radeon HD 6770 should in theory be a small bit superior to the GeForce GTS 450 overall. (explain)

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

Texel Rate

The Radeon HD 6770 is quite a bit (more or less 44%) more effective at AF 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 will be just a bit (about 15%) faster with regards to anti-aliasing than the GeForce GTS 450, and able to handle higher screen resolutions better. (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

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

Model GeForce GTS 450 Radeon HD 6770
Manufacturer nVidia AMD
Year September 2010 January 2011
Code Name GF106 Juniper XT
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 512 MB 512 MB
Core Speed 783 MHz 900 MHz
Shader Speed 1566 MHz (N/A) MHz
Memory Speed 902 MHz (3608 MHz effective) 1050 MHz (4200 MHz effective)
Unified Shaders 192 800
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 106 watts 108 watts
Shader Model 5.0 5.0
Bandwidth 57728 MB/sec 67200 MB/sec
Texel Rate 25056 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 14400 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Comments

3 Responses to “GeForce GTS 450 vs Radeon HD 6770”
[...] 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 [...]
[...] Daca as fi in situatia ta, as schimba sursa mai intai, macar cu aceasta. Apoi m-as gandi sa achizitionez placa video. [...]
[...] 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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