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GeForce GTS 250 512MB vs Radeon HD 5770


The GeForce GTS 250 512MB features a GPU core clock speed of 738 MHz, and the 512 MB of GDDR3 RAM is set to run at 1100 MHz through a 256-bit bus. It also is comprised of 128 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Compare those specs to the Radeon HD 5770, which features a core clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 37 Watts (34%)

Memory Bandwidth

Performance-wise, the Radeon HD 5770 should theoretically be just a bit superior to the GeForce GTS 250 512MB overall. (explain)

Radeon HD 5770 76800 MB/sec
GeForce GTS 250 512MB 70400 MB/sec
Difference: 6400 (9%)

Texel Rate

The GeForce GTS 250 512MB will be much (approximately 39%) more effective at AF than the Radeon HD 5770. (explain)

GeForce GTS 250 512MB 47232 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 13232 (39%)

Pixel Rate

The Radeon HD 5770 will be a little bit (about 15%) more effective at FSAA than the GeForce GTS 250 512MB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5770 13600 Mpixels/sec
GeForce GTS 250 512MB 11808 Mpixels/sec
Difference: 1792 (15%)

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

Radeon HD 5770

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.


Display Specifications

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Model GeForce GTS 250 512MB Radeon HD 5770
Manufacturer nVidia AMD
Year March 3, 2009 October 13, 2009
Code Name G92a/b Juniper XT
Memory 512 MB 1024 MB
Core Speed 738 MHz 850 MHz
Memory Speed 2200 MHz 4800 MHz
Power (Max TDP) 145 watts 108 watts
Bandwidth 70400 MB/sec 76800 MB/sec
Texel Rate 47232 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 128 800(160x5)
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 1040 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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


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