Compare any two graphics cards:
GeForce GTS 250 1GB vs Radeon HD 5770
IntroThe GeForce GTS 250 1GB uses a 65/55 nm design. nVidia has clocked the core speed at 738 MHz. The GDDR3 memory runs at a speed of 1100 MHz on this card. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units. Compare those specifications to the Radeon HD 5770, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 RAM set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 5770 |
|
108 Watts |
| GeForce GTS 250 1GB |
|
145 Watts |
| |
Difference: 37 Watts (34%)
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Memory BandwidthAs far as performance goes, the Radeon HD 5770 should in theory be a little bit superior to the GeForce GTS 250 1GB overall. (explain)
| Radeon HD 5770 |
|
76800 MB/sec |
| GeForce GTS 250 1GB |
|
70400 MB/sec |
| |
Difference: 6400 (9%)
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Texel RateThe GeForce GTS 250 1GB should be quite a bit (more or less 39%) faster with regards to texture filtering than the Radeon HD 5770. (explain)
| GeForce GTS 250 1GB |
|
47232 Mtexels/sec |
| Radeon HD 5770 |
|
34000 Mtexels/sec |
| |
Difference: 13232 (39%)
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Pixel RateIf using a high resolution is important to you, then the Radeon HD 5770 is the winner, though not by far. (explain)
| Radeon HD 5770 |
|
13600 Mpixels/sec |
| GeForce GTS 250 1GB |
|
11808 Mpixels/sec |
| |
Difference: 1792 (15%)
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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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page.
GeForce GTS 250 1GB
Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Radeon HD 5770
Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model
| GeForce GTS 250 1GB |
Radeon HD 5770 |
| Manufacturer
| nVidia |
ATi |
| Year
| March 3, 2009 |
October 13, 2009 |
| Code Name
| G92a/b |
Juniper XT |
| Fab Process
| 65/55 nm |
40 nm |
| Bus
| PCIe x16 2.0 |
PCIe 2.1 x16 |
| Memory
| 1024 MB |
1024 MB |
| Core Speed
| 738 MHz |
850 MHz |
| Shader Speed
| 1836 MHz |
(N/A) MHz |
| Memory Speed
| 1100 MHz |
1200 MHz |
| 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 |
| DirectX Version
| DirectX 10 |
DirectX 11 |
| OpenGL Version
| OpenGL 3.1 |
OpenGL 3.2 |
| Power (Max TDP)
| 145 watts |
108 watts |
| Shader Model
| 4.0 |
5.0 |
| Bandwidth
| 70400 MB/sec |
76800 MB/sec |
| Texel Rate
| 47232 Mtexels/sec |
34000 Mtexels/sec |
| Pixel Rate
| 11808 Mpixels/sec |
13600 Mpixels/sec |
Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead.
The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions. Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second. Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
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