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GeForce GTX 260 vs GeForce GTX 660

Intro

The GeForce GTX 260 uses a 65 nm design. nVidia has clocked the core frequency at 576 MHz. The GDDR3 RAM works at a speed of 999 MHz on this particular card. It features 192 SPUs as well as 64 Texture Address Units and 28 ROPs.

Compare those specs to the GeForce GTX 660, which features core clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs as well as 80 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 260 182 Watts
Difference: 42 Watts (30%)

Memory Bandwidth

The GeForce GTX 660 should in theory perform quite a bit faster than the GeForce GTX 260 overall. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 32304 (29%)

Texel Rate

The GeForce GTX 660 should be quite a bit (approximately 113%) more effective at AF than the GeForce GTX 260. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 41536 (113%)

Pixel Rate

The GeForce GTX 660 is much (more or less 46%) faster with regards to AA than the GeForce GTX 260, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 260 16128 Mpixels/sec
Difference: 7392 (46%)

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 GTX 260

Amazon.com

GeForce GTX 660

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 GTX 260 GeForce GTX 660
Manufacturer nVidia nVidia
Year June 16, 2008 September 2012
Code Name G200 GK106
Fab Process 65 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 896 MB 2048 MB
Core Speed 576 MHz 980 MHz
Shader Speed 1242 MHz 980 MHz
Memory Speed 1998 MHz 6008 MHz
Unified Shaders 192 960
Texture Mapping Units 64 80
Render Output Units 28 24
Bus Type GDDR3 GDDR5
Bus Width 448-bit 192-bit
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.3
Power (Max TDP) 182 watts 140 watts
Shader Model 4.0 5.0
Bandwidth 111888 MB/sec 144192 MB/sec
Texel Rate 36864 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 23520 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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

Comments

One Response to “GeForce GTX 260 vs GeForce GTX 660”

[...] GeForce GTX 260 vs GeForce GTX 660 – Performance Comparison Benchmarks @ Hardware Compare 30% only more memory bandwith :P [...]

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