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GeForce GTS 450 vs GeForce GTX 650

Intro

The GeForce GTS 450 features core speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs along with 32 TAUs and 16 ROPs.

Compare all that to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 memory works at a speed of 1250 MHz on this particular model. It features 384 SPUs as well as 32 Texture Address Units and 16 ROPs.

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 perform quite a bit 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 is a lot (approximately 35%) better at AF than the GeForce GTS 450. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 650 is a better choice, by a large margin. (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

GeForce GTS 450

GeForce GTX 650

Specifications

Display 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 1024 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: Bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core 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 processed in a second.

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

GeForce GTS 450

GeForce GTX 650

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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