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GeForce GTS 450 vs GeForce GTX 650

Intro

The GeForce GTS 450 has core clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the GeForce GTX 650, which features GPU core speed of 1058 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also features 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce GTS 450 106 Watts
Difference: 42 Watts (66%)

Memory Bandwidth

In theory, the GeForce GTX 650 should be a lot faster than the GeForce GTS 450 in general. (explain)

GeForce GTX 650 80000 MB/sec
GeForce GTS 450 57728 MB/sec
Difference: 22272 (39%)

Texel Rate

The GeForce GTX 650 should be a lot (more or less 35%) faster with regards to AF than the GeForce GTS 450. (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce GTS 450 25056 Mtexels/sec
Difference: 8800 (35%)

Pixel Rate

The GeForce GTX 650 will be quite a bit (more or less 35%) faster with regards to FSAA than the GeForce GTS 450, and should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce GTS 450 12528 Mpixels/sec
Difference: 4400 (35%)

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 GTS 450

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

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Model GeForce GTS 450 GeForce GTX 650
Manufacturer nVidia nVidia
Year September 2010 September 2012
Code Name GF106 GK107
Memory 512 MB 2048 MB
Core Speed 783 MHz 1058 MHz
Memory Speed 3608 MHz 5000 MHz
Power (Max TDP) 106 watts 64 watts
Bandwidth 57728 MB/sec 80000 MB/sec
Texel Rate 25056 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 192 384
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 1300 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTS 450 vs GeForce GTX 650”
Best Single Slot Video Card? - Hardware Canucks says:

[...] GeForce GTS 450 vs GeForce GTX 650 – Performance Comparison Benchmarks @ Hardware Compare Or a 640 would be very close to the performance of a GTS 450 i think! those cards are around 100$ and 80$... I would really recommend a 650 or a 640,new technology! and they are small. You are right,the 6750 is about the same performance...But well it's not a super new card :/ [...]

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