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Re: Precision T3500 Ram

YOU CANNOT USE 8 GIG Dimms.

Recommended Upgrade

part image
Memory Type: DDR3 PC3-12800
Maximum Memory: 24GB
Slots: 6
T3500 memory configurator SR=Single Rank  DR = Dual Rank
You cannot mix and match

It is important to ensure that DIMMs with appropriate number of ranks are populated in each channel for optimal performance. Whenever possible, it is recommended to use dual-rank DIMMs in the system. Dual-rank DIMMs offer better interleaving and hence better performance than single-rank DIMMs.

For instance, a system populated with six 2GB dual-rank DIMMs outperforms a system populated with six 2GB single-rank DIMMs by 7% for SPECjbb2005. Dual-rank DIMMs are also better than quad-rank DIMMs because quad-rank DIMMs will cause the memory speed to be down-clocked.

Another important guideline is to populate equivalent ranks per channel. For instance, mixing one single-rank DIMM and one dual-rank DIMM in a channel is not recommended.


Size
(GB)
DIMM
Ranks
DIMM1DIMM2DIMM3DIMM4DIMM5DIMM6Channel
Mode
1 SR 1 GB           Single
2 SR 1 GB 1 GB         Dual
3 SR 1 GB 1 GB 1 GB       Tri
4 SR 1 GB 1 GB 1 GB 1 GB     Tri
4 DR 2 GB 2 GB         Dual
6 SR 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB Tri
6 DR 2 GB 2 GB 2 GB       Tri
12 DR 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB Tri
12 DR 4 GB 4 GB 4 GB       Tri
24 DR 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB Tri

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