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GeForce GTS 450 vs Radeon HD 4850 512MB

Intro

The GeForce GTS 450 has 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 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 4850 512MB, which comes with a core clock speed of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 106 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 4 Watts (4%)

Memory Bandwidth

The Radeon HD 4850 512MB, in theory, should be just a bit faster than the GeForce GTS 450 in general. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 5824 (10%)

Texel Rate

The GeForce GTS 450 is just a bit (more or less 0%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTS 450 25056 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 56 (0%)

Pixel Rate

The GeForce GTS 450 should be quite a bit (more or less 25%) faster with regards to AA than the Radeon HD 4850 512MB, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTS 450 12528 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 2528 (25%)

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

Display Prices

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GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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 Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year September 2010 Jun 25, 2008
Code Name GF106 RV770 PRO
Memory 512 MB 512 MB
Core Speed 783 MHz 625 MHz
Memory Speed 3608 MHz 1986 MHz
Power (Max TDP) 106 watts 110 watts
Bandwidth 57728 MB/sec 63552 MB/sec
Texel Rate 25056 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTS 450

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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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