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GeForce GTX 460 vs GeForce GTX 650

Intro

The GeForce GTX 460 has a core clock speed of 675 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 192-bit memory bus, and uses a 40 nm design. It is made up of 336 SPUs, 56 TAUs, and 24 Raster Operation Units.

Compare those specs to the GeForce GTX 650, which features core speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTX 460 150 Watts
Difference: 86 Watts (134%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 should in theory be a bit superior to the GeForce GTX 650 in general. (explain)

GeForce GTX 460 86400 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 6400 (8%)

Texel Rate

The GeForce GTX 460 will be a little bit (approximately 12%) faster with regards to anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GTX 460 37800 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 3944 (12%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is the winner, though not by far. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce GTX 460 16200 Mpixels/sec
Difference: 728 (4%)

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 460

Amazon.com

GeForce GTX 650

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 460 GeForce GTX 650
Manufacturer nVidia nVidia
Year July 2010 September 2012
Code Name GF104 GK107
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 768 MB 2048 MB
Core Speed 675 MHz 1058 MHz
Shader Speed 1350 MHz 1058 MHz
Memory Speed 900 MHz (3600 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 336 384
Texture Mapping Units 56 32
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 150 watts 64 watts
Shader Model 5.0 5.0
Bandwidth 86400 MB/sec 80000 MB/sec
Texel Rate 37800 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Comments

4 Responses to “GeForce GTX 460 vs GeForce GTX 650”
zoe says:
I purchased a GEFORCE GT620 on advice from the shop technician. Performance was dismal. An ATI Radeon HD5670 at the same price gives me a bench mark of 7.1 for graphics and gaming graphics. The old faithful GTX which cost a lot more bechmarks in at 7.6 for both tests. The GT620 comes in at 4 for the Graphics and 5.1 for gaming graphics. The GT620 2GB costs $80 and the GT630 4GB $150.
leland says:
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leland says:
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