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GeForce GTX 295 vs Radeon HD 7790

Intro

The GeForce GTX 295 has a GPU clock speed of 576 MHz, and the 896 MB of GDDR3 memory runs at 999 MHz through a 448-bit bus. It also features 240 SPUs, 80 TAUs, and 28 Raster Operation Units.

Compare those specifications to the Radeon HD 7790, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
GeForce GTX 295 289 Watts
Difference: 204 Watts (240%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 295 should in theory be a lot better than the Radeon HD 7790 overall. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 127776 (133%)

Texel Rate

The GeForce GTX 295 is much (approximately 65%) better at anisotropic filtering than the Radeon HD 7790. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 36160 (65%)

Pixel Rate

The GeForce GTX 295 will be quite a bit (approximately 102%) better at anti-aliasing than the Radeon HD 7790, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 16256 (102%)

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 GTX 295

Amazon.com

Check prices at:

Radeon HD 7790

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 GTX 295 Radeon HD 7790
Manufacturer nVidia AMD
Year January 8, 2009 March 2013
Code Name G200b Bonaire XT
Memory 896 MB (x2) 1024 MB
Core Speed 576 MHz (x2) 1000 MHz
Memory Speed 1998 MHz (x2) 6000 MHz
Power (Max TDP) 289 watts 85 watts
Bandwidth 223776 MB/sec 96000 MB/sec
Texel Rate 92160 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 240 (x2) 896
Texture Mapping Units 80 (x2) 56
Render Output Units 28 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit (x2) 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 2080 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. 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 potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 7790

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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