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GeForce 9500 GT DDR2 vs Radeon HD 7770

Intro

The GeForce 9500 GT DDR2 features a clock speed of 550 MHz and a DDR2 memory speed of 500 MHz. It also uses a 128-bit memory bus, and makes use of a 65 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon HD 7770, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT DDR2 50 Watts
Radeon HD 7770 80 Watts
Difference: 30 Watts (60%)

Memory Bandwidth

In theory, the Radeon HD 7770 should be 350% faster than the GeForce 9500 GT DDR2 overall, because of its higher data rate. (explain)

Radeon HD 7770 72000 MB/sec
GeForce 9500 GT DDR2 16000 MB/sec
Difference: 56000 (350%)

Texel Rate

The Radeon HD 7770 is a lot (about 355%) more effective at texture filtering than the GeForce 9500 GT DDR2. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce 9500 GT DDR2 8800 Mtexels/sec
Difference: 31200 (355%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7770 is superior to the GeForce 9500 GT DDR2, by a large margin. (explain)

Radeon HD 7770 16000 Mpixels/sec
GeForce 9500 GT DDR2 4400 Mpixels/sec
Difference: 11600 (264%)

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 9500 GT DDR2

Amazon.com

Radeon HD 7770

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

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Model GeForce 9500 GT DDR2 Radeon HD 7770
Manufacturer nVidia AMD
Year July 2008 February 2012
Code Name G96a Cape Verde XT
Fab Process 65 nm 28 nm
Bus PCIe x16 2.0, PCI PCIe 3.0 x16
Memory 256 MB 1024 MB
Core Speed 550 MHz 1000 MHz
Shader Speed 1400 MHz (N/A) MHz
Memory Speed 1000 MHz 4500 MHz
Unified Shaders 32 640
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2
Power (Max TDP) 50 watts 80 watts
Shader Model 4.0 5.0
Bandwidth 16000 MB/sec 72000 MB/sec
Texel Rate 8800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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