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GeForce GTS 450 1GB vs Radeon HD 4770

Intro

The GeForce GTS 450 1GB uses a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 RAM works at a speed of 902 MHz on this specific card. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 4770, which makes use of a 40 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory runs at a frequency of 800 MHz on this particular card. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
GeForce GTS 450 1GB 106 Watts
Difference: 26 Watts (33%)

Memory Bandwidth

The GeForce GTS 450 1GB should theoretically perform just a bit faster than the Radeon HD 4770 in general. (explain)

GeForce GTS 450 1GB 57728 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 6528 (13%)

Texel Rate

The GeForce GTS 450 1GB is a little bit (about 4%) better at texture filtering than the Radeon HD 4770. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
Radeon HD 4770 24000 Mtexels/sec
Difference: 1056 (4%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTS 450 1GB is a better choice, but it probably won't make a huge difference. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
Radeon HD 4770 12000 Mpixels/sec
Difference: 528 (4%)

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 4770

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

Display Specifications

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Model GeForce GTS 450 1GB Radeon HD 4770
Manufacturer nVidia AMD
Year September 2010 Apr 28, 2009
Code Name GF106 RV740
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.0 x16
Memory 1024 MB 512 MB
Core Speed 783 MHz 750 MHz
Shader Speed 1566 MHz (N/A) MHz
Memory Speed 3608 MHz 3200 MHz
Unified Shaders 192 640(128x5)
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0
Power (Max TDP) 106 watts 80 watts
Shader Model 5.0 4.1
Bandwidth 57728 MB/sec 51200 MB/sec
Texel Rate 25056 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 12000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 are processed in one second. This 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 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 number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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