QUOTE(CFD2 @ Dec 22 2005, 07:34 PM)Hi all
I'm going to use this rig purely as a compute server for CFD simulations http://en.wikipedia.org/wiki/Comput..._fluid_dynamics
' ">http://en.wikipedia.org/wiki/Comput..._fluid_dynamics. This means the processes run fully in RAM and typically run for hours to days @100% CPU. CFD codes are are heavily parrallelised so each extra core is gold in reducing compute time and is fully utilised.
Basically there is very little IO except for loading the runs and post-processing (viewing results, making videos) which is pretty IO and GFX intensive as results files can run into many gigs etc.
After digging through these forums this is what I'm proposing to get:
MB: TYAN K8WE with SCSI option:
I am rather nervous about all the reported BIOS issues ...
CPUs: 2x Opteron 265's (may go for 270s):
I'm not going to OC much (stability is very NB in CFD) but may try to bump them slightly to, say 2000 MHZ.
RAM: 4x Corsair 1 gb CM72SD1024RLP-3200/S 3-3-3-8
One in each channel per CPU hopefully giving me dual channel speeds + NUMA Somone please confirm this is good to go for dual channel bandwidth + NUMA (OS = Red hat enterprise WS 4)??? Memory bandwidth is the second most NB thing for CFD after raw core speed Do I need to buy RAM in matched pairs to get dual channel running properly??? I will be popping some heat spreaders on these naked sticks.
Chip coolers: 2x Thermalright XP-90Cs + 2x Panasonic Panaflo 90 mm fans
HDD: 2x Seagate Cheetah 15K.4 36GB U320 Non raided using the onboard SCSI controller.
1st HDD: OS + apps, 2nd HDD: swap + working folders. I will also be adding a SATA 2 RAID later (probably using the onboard RAID 5 capability). The SATA 2 RAID will only be accessed very infrequently and basically just be there for data storage. I'm not worried about RAIDing the two SCSI drives as I can re-image them quickly if they **** out ...
GFX: 1x Gigabyte Geforce 7800 GT GV-NX78T256D-ZK
I currently use a geforce 4600(!
and even this has more than enough oomph to do all the post-processing which is all OGL based. So a 7800 GT seems more than adaquate. Quadros are a complete waste of $ to me
PS: Silverstone ST65ZF 650 W
Chassis: LIAN LI PC-V2000 with 2x 120 mm stock fans.
Very expensive but tons of room for expansion Depending on how things turn out I may add extra/different fans.
None of this is set in stone so I welcome feedback / sugestions / flames /ph34r.gif' border='0' style='vertical-align:middle' alt='ph34r.gif' />
PS: Thanks to AMD for making the 2xx Opteron series ... pity they are so expensive /wacko.gif' border='0' style='vertical-align:middle' alt='wacko.gif' />
[right][snapback]572541[/snapback][/right]My K8W benchmarks
' ">http://wowway.com/~mckennma/Benchmark/index.htmMy K8W specs
The K8WE is a nice board. Lacks 5.1 or 7.1 on-board sound. I have a PCI-X SCSI RAID 320-2X with 512MB cache on mine. It is worth looking at to feed this board. Check out the Cooler Master Stacker 810 and 830. You will find them to be excellent chassis. Check the Supermicro CSE-M35S SCA SCSI U320 enclosures for your SCSI drives.
Tyan Thunder K8WE
Dual AMD 280 Opterons
8GB NUMA enabled DDR333 2.5-3-3-7 RAM
PCI-X SCSI RAID