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GeForce GTS 450 vs Radeon HD 4850 512MB

Intro

The GeForce GTS 450 has a core clock speed of 783 MHz and a GDDR5 memory frequency of 902 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It features 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 4850 512MB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory works at a frequency of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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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

As far as performance goes, the Radeon HD 4850 512MB should in theory be just a bit superior to 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 a little bit (approximately 0%) more effective at texture 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

If running with a high resolution is important to you, then the GeForce GTS 450 is superior to the Radeon HD 4850 512MB, by a large margin. (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

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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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video 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 write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach 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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