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GeForce GTS 250 512MB vs Radeon HD 4850 2GB

Intro

The GeForce GTS 250 512MB has a clock speed of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also makes use of a 256-bit memory bus, and makes use of a 65/55 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 4850 2GB, which has GPU core speed of 625 MHz, and 2048 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 35 Watts (32%)

Memory Bandwidth

The GeForce GTS 250 512MB should theoretically perform a bit faster than the Radeon HD 4850 2GB in general. (explain)

GeForce GTS 250 512MB 70400 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 6848 (11%)

Texel Rate

The GeForce GTS 250 512MB should be much (about 89%) more effective at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTS 250 512MB 47232 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 22232 (89%)

Pixel Rate

The GeForce GTS 250 512MB will be a little bit (more or less 18%) faster with regards to FSAA than the Radeon HD 4850 2GB, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 250 512MB 11808 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 1808 (18%)

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 250 512MB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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 250 512MB Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year March 3, 2009 Jun 25, 2008
Code Name G92a/b RV770 PRO
Memory 512 MB 2048 MB
Core Speed 738 MHz 625 MHz
Memory Speed 2200 MHz 1986 MHz
Power (Max TDP) 145 watts 110 watts
Bandwidth 70400 MB/sec 63552 MB/sec
Texel Rate 47232 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 128 800(160x5)
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR4
Bus Width 256-bit 256-bit
Fab Process 65/55 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTS 250 512MB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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