Join Us On Facebook

Compare any two graphics cards:
VS

GeForce GTX 660 Ti vs Radeon HD 7950

Intro

The GeForce GTX 660 Ti has clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1344 SPUs as well as 112 Texture Address Units and 24 Rasterization Operator Units.

Compare that to the Radeon HD 7950, which comes with core speeds of 800 MHz on the GPU, and 1250 MHz on the 1536 MB of GDDR5 RAM. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
Radeon HD 7950 200 Watts
Difference: 50 Watts (33%)

Memory Bandwidth

The Radeon HD 7950 should in theory be much faster than the GeForce GTX 660 Ti in general. (explain)

Radeon HD 7950 240000 MB/sec
GeForce GTX 660 Ti 144000 MB/sec
Difference: 96000 (67%)

Texel Rate

The GeForce GTX 660 Ti is just a bit (more or less 14%) faster with regards to anisotropic filtering than the Radeon HD 7950. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 12880 (14%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7950 is a better choice, though only just barely. (explain)

Radeon HD 7950 25600 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 3640 (17%)

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

GeForce GTX 660 Ti

Amazon.com

Radeon HD 7950

Amazon.com

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

Model GeForce GTX 660 Ti Radeon HD 7950
Manufacturer nVidia AMD
Year August 2012 January 2012
Code Name GK104 Tahiti Pro
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 1536 MB
Core Speed 915 MHz 800 MHz
Shader Speed 915 MHz (N/A) MHz
Memory Speed 1500 MHz (6000 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 1344 1792
Texture Mapping Units 112 112
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 384-bit
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2
Power (Max TDP) 150 watts 200 watts
Shader Model 5.0 5.0
Bandwidth 144000 MB/sec 240000 MB/sec
Texel Rate 102480 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 21960 Mpixels/sec 25600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the 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 core clock speed. 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTX 660 Ti vs Radeon HD 7950”
[...] 7950 cả: Để bạn khỏi nói rằng mình chỉ dựa trên mỗi techpowerup thì đây link của Hardware Coparison và pic của tom's hardware Rất nhiều người chơi game res trên 1920x1080p đó [...]

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Spam Protection by WP-SpamFree