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23rd November 2019, 18:17 #1
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FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
I want to design an array multiplier using verilog and need to dump it into FPGA, out of stratix III, Artix 7, and kintex 7, which FPGA I need to select, so that computation time of the verilog code of array multiplier will be less.

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24th November 2019, 10:22 #2
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Re: FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
Hello,
as far as I understood you correctly  you waana design a matrix multiplier (2 dimensional arrays). You don't give many important assumptuions related to your design. We don't know how big can this matrices be? We aslo don't know how is type of data in these matrices  are them fixedpoint or floatingpoint numbers. You are trying compare three different serires of FPGA (even from different vendors), it is a bit like comparing apples to oranges. From these three series Kintex7 is the biggest one  in sense of having the biggest number of hardware multipliers and DSP block (which are basic construction material of such design). If biggest dimension of input matrices are not enormously big it could be to shoot from cannon to fly.
Give your assumptions to this design. It may to show that you can do this project efficiently on smaller FPGAs (end many times cheaper than these you list).
Regards

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24th November 2019, 10:55 #3
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Re: FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
Thanks, but my question is, suppose I have some functionality (for the time being I am ignoring the type of operation) and I want to implement the functionality to each the three different FPGAs. Out of the three FPGAs, which one will take less time to execute the functionality (assume the same data is given to the function for each of the FPGAs)

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24th November 2019, 12:03 #4
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Re: FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
Hello,
it is impossible to answert such question. If you don't specify type of operations  I am citating:
(for the time being I am ignoring the type of operation)
The most likely (if your desifgn and code would be proper) there will be negligible differences between these three families of FPGAs.
It is possible that you don't need FPGA at all and you could use microcontroller
Regards

24th November 2019, 15:36 #5
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Re: FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
If you ran the same code at the same clock speed in all 3 FPGAs, it would take the same time in every FPGA.
They are not processors  they allow you to design hardware. And hardware will always take a fixed time to process, depending on how you design it.

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24th November 2019, 18:57 #6
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Re: FPGA stratix III vs Artix 7 vs kintex 7, which one is faster?
Not sure about Stratix III, but the maximum frequency speed is higher on Kintex7 related to Spartan7.
This can be found on DC switching datasheet: DS189 for Spartan 7, DS182 for Kintex7.
For example, maximum achievable speed for DSP48 on Spartan 7 is 550 MHz, while on Kintex7 is 741 MHz. This of course, can be verified for all different logic blocks available (I/Os, BRAMs, ordinary logic, PLL, etc.)
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