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GeForce GTX 295 vs Geforce GTX 680

Intro

The GeForce GTX 295 uses a 55 nm design. nVidia has clocked the core frequency at 576 MHz. The GDDR3 RAM is set to run at a speed of 999 MHz on this particular model. It features 240 SPUs along with 80 Texture Address Units and 28 ROPs.

Compare all that to the Geforce GTX 680, which has clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
GeForce GTX 295 289 Watts
Difference: 94 Watts (48%)

Memory Bandwidth

The GeForce GTX 295, in theory, should be just a bit faster than the Geforce GTX 680 in general. (explain)

GeForce GTX 295 223776 MB/sec
Geforce GTX 680 192256 MB/sec
Difference: 31520 (16%)

Texel Rate

The Geforce GTX 680 is a lot (approximately 40%) faster with regards to AF than the GeForce GTX 295. (explain)

Geforce GTX 680 128768 Mtexels/sec
GeForce GTX 295 92160 Mtexels/sec
Difference: 36608 (40%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 295 is a better choice, not by a very large margin though. (explain)

GeForce GTX 295 32256 Mpixels/sec
Geforce GTX 680 32192 Mpixels/sec
Difference: 64 (0%)

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

GeForce GTX 295

Amazon.com

Geforce GTX 680

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 295 Geforce GTX 680
Manufacturer nVidia nVidia
Year January 8, 2009 March 2012
Code Name G200b GK104
Fab Process 55 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 896 MB (x2) 2048 MB
Core Speed 576 MHz (x2) 1006 MHz
Shader Speed 1242 MHz (x2) 1006 MHz
Memory Speed 999 MHz (1998 MHz effective) (x2) 1502 MHz (6008 MHz effective)
Unified Shaders 240 (x2) 1536
Texture Mapping Units 80 (x2) 128
Render Output Units 28 (x2) 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit (x2) 256-bit
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.2
Power (Max TDP) 289 watts 195 watts
Shader Model 4.0 5.0
Bandwidth 223776 MB/sec 192256 MB/sec
Texel Rate 92160 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 32192 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 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 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 most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Comments

6 Responses to “GeForce GTX 295 vs Geforce GTX 680”
SpArTaN says:
Damn xD A GTX295 beats a GTX680
derp says:
No it doesn't - this theoretical chart doesn't take internal SLI scaling efficiency of 295 in to account. In real world, 680 wipes the floor off 295.
Cumshotfake says:
The GTX 295 still performs impressively with current games, if you are ok with DX 10.
Also it comes quite close to the GTX 680's general performance in high resolutions. But keep in mind, that a 680 is a single graphic chip, that needs less power and has the overall way better performance than an older GTX 295.
ggyyggygygygyyggyyg says:
WTF?
Theoretical BS.

here is realworld results:
http://www.evga.com/forums/tm.aspx?m=1519228

SilenceMan says:
Lol GTX 295 comes neck to neck with GTX 680...if someone doesn't"t have problem with Dx10 he can sli them and easily in 3D programs beats all GPUs except GTX 690....

in general until 2015-2016 would be really good....then you will be able to buy from series : 9xx and 10xx...

Matt says:
It took a while but you can now 3-way two 295's and dedicate the last half to Phys-X.

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