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GeForce GTS 250 1GB vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTS 250 1GB features a GPU core speed of 738 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1100 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 4850 X2 1GB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 RAM runs at a frequency of 993 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB 145 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 105 Watts (72%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 1GB should perform a lot faster than the GeForce GTS 250 1GB overall. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
GeForce GTS 250 1GB 70400 MB/sec
Difference: 56704 (81%)

Texel Rate

The Radeon HD 4850 X2 1GB is just a bit (more or less 6%) faster with regards to anisotropic filtering than the GeForce GTS 250 1GB. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
GeForce GTS 250 1GB 47232 Mtexels/sec
Difference: 2768 (6%)

Pixel Rate

The Radeon HD 4850 X2 1GB is much (about 69%) faster with regards to anti-aliasing than the GeForce GTS 250 1GB, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4850 X2 1GB 20000 Mpixels/sec
GeForce GTS 250 1GB 11808 Mpixels/sec
Difference: 8192 (69%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTS 250 1GB

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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 1GB Radeon HD 4850 X2 1GB
Manufacturer nVidia AMD
Year March 3, 2009 Nov 7, 2008
Code Name G92a/b R700
Memory 1024 MB 1024 MB (x2)
Core Speed 738 MHz 625 MHz (x2)
Memory Speed 2200 MHz 1986 MHz (x2)
Power (Max TDP) 145 watts 250 watts
Bandwidth 70400 MB/sec 127104 MB/sec
Texel Rate 47232 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 128 800(160x5) (x2)
Texture Mapping Units 64 40 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 65/55 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB 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. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 1GB

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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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