[nitinbansal184]

i will be upgrading my old pc for cfd work....Pls need some suggestion

replacing old components(pentium processor) with these

1.) Intel 3.1 GHz LGA 1155 Core i5 3450 Processor.
2.) ASRock B75M-GL Motherboard
3.) G.skill Sniper 8GB (2 x 4GB) DDR3 1600MHz Desktop RAM (F3-12800CL9D-8GBSR)
4.) 1 tb sata (Any brand)


pls help!

[scipy]

http://www.cfd-online.com/Forums/har...eon-w3550.html

[abdul099]

Since your replacement ends up in purchasing a completely new machine, I'd check if there are any reasonable suggestions in other threads.
Also nobody knows about your budget and what kind of simulations you're doing. That makes it pretty hard to make a suggestion. I mean, I'm not even sure what you're asking about since you already have some components in mind...

[andyj]

It sounds like you are using your old case with new components.
You will have to connect the case power switch and lights to the motherboard
front panel header. Internet search for the front panel pinout for your old case.
You can use a 3v cmos battery to test the wires for the power led light and
hard drive activity light. The led lights have a positive and a negative wire.
Positive led light goes to positive motherboard front panel header. the power on switch does not usually have a negative or positive.
You test your wires with a ohm meter to find out when there is a connection when the power switch is pushed. You get the tiny square pins to insert from a junk motherboard. Just cut them off, you only need a 1/4 inch of the square male pin to use for test leads.
You most likely will need to take a razor blade or knife/tiny screwdriver and
pry up the plastic rectangular pin retainer (its in the plastic plug in that went to
the old mother board), the pull out the square pin female plugs.
and then directly test them to identify and then plug into the new motherboard.
(the plugin to your old computer motherboard will be different
than your new motherboard. Try to trace back the wires as far as you can.
http://www.computerhope.com/issues/ch000421.htm
I would also do a google image search for your old computers front panel pinout. ie.
(dell dimension front panel pinout)..hp, gateway..ect
Youtube also has some videos on installing motherboards, but mostly for new cases with marked header wires.
Do not start the computer without the cpu fan wire connected, not even for a minute.
Usb wiring is easier, only 4 wires. Your old case plug might work.If not extract plug ins from plastic retainer and plug in directly
Another note, you should heat shrink wrap the pins if you are going to not be able to use the old front panel connector.
Remember you will need a compatible sata power supply.
Since the computer may run for long periods of time, you might consider a bigger heatsink.
General case wiring hints:
http://duhvoodooman.com/mitchedo/Dell/casemods.htm
http://duhvoodooman.com/mitchedo/Dell/testing.htm

[andyj]

The Asrock board you mentioned supports DDR3 2200. You might consider faster ram, such as 1866 or faster, if you have the money. But if you got a great deal on the 1600, that will work.

The Intel I-5 is a great processor. I-7 is better, but more money.

My personal preference is for the AMD FX series, or Magny Cours, since you get more computing power per dollar.

If you are not using Windows 8, you can dual boot Linux. (Actually you can dual boot windows 8, but you drop UEFI security). I might suggest GeekoCFD, which is OpenSuse 12.2 with OpenFoam included. Can also add other Scientific packages as needed.
You might also want to look at Amazons CFD cloud computing services (or others), for more computing power. Or do a Linux Cluster.

[nitinbansal184]

Originally Posted by abdul099

Since your replacement ends up in purchasing a completely new machine, I'd check if there are any reasonable suggestions in other threads.
Also nobody knows about your budget and what kind of simulations you're doing. That makes it pretty hard to make a suggestion. I mean, I'm not even sure what you're asking about since you already have some components in mind...

I just want not do simulation not more than 2milion or you can say General CFD computer...

[abdul099]

A general CFD computer is not well defined. It's something different to run F1 cases or a simple pipe flow...

Anyway, for your case the hardware you've already suggested should be fine. As long as you go for a single CPU, make sure you get a fast one (as fast as possible). Intel i7 (Sandy Bridge E generation) are pretty good ones, but there should be decent i5 as well.

Also, as andyj said, faster ram can increase performance. But I have to contradict regarding the AMD Magny Cours. They are pretty cheap, but I didn't hear any good feedback for CFD applications.