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GeForce GTS 450 vs GeForce GTX 650

Intro

The GeForce GTS 450 uses a 40 nm design. nVidia has clocked the core speed at 783 MHz. The GDDR5 RAM runs at a frequency of 902 MHz on this particular card. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.

Compare those specifications to the GeForce GTX 650, which has GPU core speed of 1058 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 32 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

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

Theoretically speaking, the GeForce GTX 650 should be 39% quicker than the GeForce GTS 450 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The GeForce GTX 650 is quite a bit (about 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 lots of anti-aliasing is important to you, then the GeForce GTX 650 is superior to the GeForce GTS 450, 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

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 GTS 450 GeForce GTX 650
Manufacturer nVidia nVidia
Year September 2010 September 2012
Code Name GF106 GK107
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 512 MB 2048 MB
Core Speed 783 MHz 1058 MHz
Shader Speed 1566 MHz 1058 MHz
Memory Speed 902 MHz (3608 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 192 384
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 106 watts 64 watts
Shader Model 5.0 5.0
Bandwidth 57728 MB/sec 80000 MB/sec
Texel Rate 25056 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 reach the maximum fill rate.

Comments

One Response to “GeForce GTS 450 vs GeForce GTX 650”
[...] 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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