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Scotter
Guest
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 Posted: Mon Jan 09, 2006 7:32 pm Post subject: which memory slots to fill on Tyan Thunder K8WE |
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Hi -
I'm trying to decide if I need to trade my four 512MB chips for two 1 gig
chips.
I have a total of:
four 512MB chips and
two 1 GB chips
* All this RAM is DDR400 ECC/REG
Both processor slots filled with Opteron 252's.
Wanting to enable NUMA on this MB.
Would either of the following configs work? If so, which is better?
CPU1 mem slots: put both 1 gig chips here
CPU 2 mem slots: put all the 512MB chips here
- OR -
CPU1 mem slots: put one 1 gig chip and two 512 MB chips here
CPU 2 mem slots: put one 1 gig chip and two 512 MB chips here
Thanks for the advice!
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Scotter |
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Scotter
Guest
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| Posted: Mon Jan 09, 2006 9:32 pm Post subject: Re: which memory slots to fill on Tyan Thunder K8WE |
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To answer my own question 
This motherboard is VERY RAM flexible!
So far this config worked and even with NUMA:
| Quote: | CPU1 mem slots: put both 1 gig chips here
CPU 2 mem slots: put all four 512MB chips here
|
Didn't try the 3-chips-per-slot idea.
Oh and if you want to turn on NUMA in XP-32-Pro-SP2, turn OFF RAM
Interleaving in BIOS and put /PAE in boot.ini.
That's all I had to do and voila! 11MB/sec in Sandra Sisoft benchmark.
--
Scotter
"Scotter" <spam@spam.com> wrote in message
news:NEywf.33037$g_6.12941@tornado.texas.rr.com...
| Quote: | Hi -
I'm trying to decide if I need to trade my four 512MB chips for two 1 gig
chips.
I have a total of:
four 512MB chips and
two 1 GB chips
* All this RAM is DDR400 ECC/REG
Both processor slots filled with Opteron 252's.
Wanting to enable NUMA on this MB.
Would either of the following configs work? If so, which is better?
CPU1 mem slots: put both 1 gig chips here
CPU 2 mem slots: put all the 512MB chips here
- OR -
CPU1 mem slots: put one 1 gig chip and two 512 MB chips here
CPU 2 mem slots: put one 1 gig chip and two 512 MB chips here
Thanks for the advice!
--
Scotter
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Rob Stow
Guest
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| Posted: Mon Jan 09, 2006 11:32 pm Post subject: Re: which memory slots to fill on Tyan Thunder K8WE |
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Scotter wrote:
| Quote: | To answer my own question
This motherboard is VERY RAM flexible!
So far this config worked and even with NUMA:
CPU1 mem slots: put both 1 gig chips here
CPU 2 mem slots: put all four 512MB chips here
Didn't try the 3-chips-per-slot idea.
Oh and if you want to turn on NUMA in XP-32-Pro-SP2, turn OFF RAM
Interleaving in BIOS
|
You need to turn off node interleave, but make sure you leave
*bank* interleave on (default).
| Quote: | and put /PAE in boot.ini.
That's all I had to do and voila! 11MB/sec in Sandra Sisoft benchmark.
|
A worthwhile read:
http://www.digit-life.com/articles2/cpu/rmma-numa.html
As a bonus, they use an S2895 box for their test system. |
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David Schwartz
Guest
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| Posted: Thu Jan 12, 2006 12:32 am Post subject: Re: which memory slots to fill on Tyan Thunder K8WE |
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"Scotter" <spam@spam.com> wrote in message
news:NEywf.33037$g_6.12941@tornado.texas.rr.com...
| Quote: | Would either of the following configs work? If so, which is better?
CPU1 mem slots: put both 1 gig chips here
CPU 2 mem slots: put all the 512MB chips here
|
This is really good. Both CPUs have the same amount of memory and all
the banks are of matched sticks.
| Quote: | - OR -
CPU1 mem slots: put one 1 gig chip and two 512 MB chips here
CPU 2 mem slots: put one 1 gig chip and two 512 MB chips here
|
This balances the memory across the CPUs, but it does not populate each
bank with two matched sticks. So this is likely inferior.
DS |
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