CPU differences: quad core, dual core, etc. for CFD

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Discussion Overview

The discussion revolves around the differences between various types of processors, specifically quad-core and dual-core processors, in the context of computational fluid dynamics (CFD) applications. Participants explore the suitability of different processors for running simulations, particularly in a lab setting that utilizes Fluent for modeling core flow in rocket engines.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Tim inquires about the differences between quad-core and dual-core processors, questioning whether a single quad-core would be more beneficial than two dual-core processors for computations.
  • Some participants suggest checking if the software can utilize multiple processors effectively, indicating that memory access may play a significant role in performance.
  • There is mention of the potential advantages of AMD processors compared to Intel, with a note that AMD's quad-core designation may refer to two dual-core chips.
  • One participant highlights that cheaper processors can be overclocked to achieve higher speeds, suggesting that the most expensive models may not be necessary.
  • Tim expresses uncertainty about server processors like Intel's Xeon and their applicability to his situation, indicating a need for clarification on their use.
  • There are requests for advice on motherboards and video cards to complement the processors being considered.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best processor choice, as multiple competing views regarding the advantages of different processor types and configurations remain. The discussion reflects uncertainty about the specific requirements of the software being used and how different processors may impact performance.

Contextual Notes

Limitations include a lack of specific details about the software's ability to utilize multiple processors, the exact specifications of the processors being discussed, and the potential impact of memory access on performance. Additionally, the discussion does not resolve the question of whether server-grade processors are suitable for Tim's needs.

Who May Find This Useful

This discussion may be useful for graduate students or researchers in CFD looking to understand the implications of different processor architectures on computational performance, as well as those considering hardware upgrades for similar applications.

timmay143
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Hello all,
I was wondering if anyone could help me figure out some differences between all the different types of processors out there for computers. I am a graduate student learning about CFD, and my advisor wanted me to check out some different processors because we would like to get new computers. Currently in our lab, we use Fluent to model core flow for a rocket engine. Some other graduate students have set up four computers in parallel to run more complicated computations. However, a couple of computers are used regularly for desktops and simple calculations for teaching and learning Fluent for new students. I am not sure of all the specs for the parallel computers (I know they are Intel Pentium 4 3.0 GHz CPU, 3GB of RAM, using Windows XP), and I do not fully understand how this works. I just know that the computers in parallel split up the computations in order to get faster results for more complex models. The new computers will be used mainly for individual desktops. However, if possible, the new computers would be used to run some of the rocket engine models. We are not necessarily looking to replace the computers that are in parallel. We just have some extra money to spend and thought it would be nice to get new computers. One of my questions is what would be better, the quad core processor or 2 dual core processors. After researching some prices on pricewatch.com, I see that the quad cores are more expensive than the duo or dual core. Is there any benefit from using one quad compared to two dual/duo for computations? My knowledge is limited about the technology as well. From my basic understanding the duo/dual and quad processors are able to do more task than a single processor, correct? Can this be compared to two computers in parallel as well? Also, should we consider Intel’s Xeon or Pentium 4 or a AMD processor? I understand the Xeon are for servers, but I do not understand what a server does and if using the Xeon is applicable for my situation. I also do not know much about the AMD processors. Finally, we have money to spend so price is not an absolute priority. However, we do not feel that the most expensive is necessary so we are looking at a few down from the top, i.e. instead of the $875 xeon 5080 we would probably look at the $200 5050 unless the 5080 is just really worth the extra $700. We plan on either buying the parts separately or going through a distributor such as Dell or HP depending upon their prices. Sorry this is really long but if anyone could point me in the right direction the help would be greatly appreciative! I also understand that some of the choices are personal preferences so if anyone has a similar setup or one they are really happy with please let me know! One last thing, I need some advice on the motherboards and video cards as well. Thanks!
Tim
 
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First, I'd check to make sure the software can make use of 4 processors at the same time.

Next, the advantages/disadvantages are all about memory access. I don't know the specifics of each processor though - ie, whether two dual cores means two memory busses and twice the throughput. You may want to check on that...

I know that's a little thin, but I hope it helped for a start...
 
Thanks Russ! I'll check it out.
 
core duo conroe or the quad version of that is the current speed king
and no need for the top priced one
as the cheaper ones over clock past the top priced one speeds
what AMD calls quad is two duals
intel makes 4 on a chip
but 2 chips should run cooler

computer over clock forum

http://www.sharkyforums.com/
 

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