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GeForce GTS 450 vs Radeon HD 6770

Intro

The GeForce GTS 450 makes use of a 40 nm design. nVidia has clocked the core speed at 783 MHz. The GDDR5 memory runs at a speed of 902 MHz on this particular card. It features 192 SPUs as well as 32 TAUs and 16 ROPs.

Compare those specifications to the Radeon HD 6770, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs 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

The Radeon HD 6770 should in theory be just a 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 is much (approximately 44%) faster with regards to texture 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 bit (approximately 15%) more effective at anti-aliasing than the GeForce GTS 450, and should be able to handle higher resolutions without slowing down too much. (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 largest amount of information (in units of MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes 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 get to the maximum 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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