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Occasional Contributor
Posts: 13
Registered: ‎2011-01-15

Crucial 1GB DDR2PC2 5300 in Ultra 6

I purchased 2 Crucial DIMMs from Micro Center for $16.99 (regular label price is $22.99) that are working fine in my Ultra 6. The label says:
1GB 240-PIN DIMM 128Mx64
DDR2PC2-5300 UNBUFF HALOGEN
CT12864AA667

I read some posts where some compatibility issues have been caused by the number of chips on a DIMM. The Crucial DIMMS that I bought have 8 chips each, as opposed to the DIMM that comes with the Ultra 6 which has 16 chips. The original DIMM has this on the label:
Unigen
UG12T6400L8DU-6AP
1GB DDR2 667 UDIMM 240PIN
1028-MU66TDL80016AUCKP
MO9907050008BB0373

The chips on the original DIMM are this:
Hynix
HY5PS12821C
Model: ReadyNAS Ultra 6
Firmware: RAIDiator 4.2.22
Disks: 6x Hitachi 5K3000 [X-RAID2]
Occasional Contributor
Posts: 13
Registered: ‎2011-01-15

Re: Crucial 1GB DDR2PC2 5300 in Ultra 6

And now it's changed back. Smiley Happy

I did some non-rigorous testing and using Bench32 from ATTO I found that it wasn't worth the upgrade, at least for me. I only ran the test twice before downgrading back to the original RAM and twice after (once using "Overlapped I/O" and the other using "Neither"). Some individual measurements were slightly better, some slightly worse, but they were all in the ballpark. I suppose that there could be some improvement in caching heavily used files, but since most of what I do is stream large files (movies) I don't care about caching as much as raw throughput. So I'll use the memory in a new backup PC that I'm now building to back up my ReadyNAS to.
Model: ReadyNAS Ultra 6
Firmware: RAIDiator 4.2.22
Disks: 6x Hitachi 5K3000 [X-RAID2]
Contributor
Posts: 71
Registered: ‎2008-10-20

Re: Crucial 1GB DDR2PC2 5300 in Ultra 6

I've got an Ultra 6 and i upgrade to 2x1 Go and all work great.

Crucial DIMM DDR2 PC2 6400 CL6
CT12864AA800
PC1: AMD Phenom II X2 @3,6Ghz (Ubuntu 13.10)
PC2: Portable AMD Athlon X2 (Win 7 SP1)
Tablette: Android 4.1
NAS: ReadyNAS Ultra 6 - 2048 Mo RAM - Firm 4.2.25
Boitiers Multimedia: 2 x NetGear NeoTV 550 Firm 3.2.27
Console WiFi: Wii - Firm 4.1E - DD 500 Go
Imprimante WiFi: Canon MP600R
Point d'accès WiFi: NetGear WNR2000
Switch : NetGear GS105
Modem Router: Freebox v5
Onduleur: APC Back-UPS ES-550 VA
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