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Precision T7500 Non-Supported Memory Configuration
I purchased from the Dell Outet Store a refurbished Precision T7500. Single CPU (xeon X5667) with 2 GB of ECC registered Ram, 1333MHz.
Not sure how that came about because 2 GB is not a supported configuration according to the User Guide.
I will be purchasing from Crucial a 12 GB kit (4 GB x 3), which is a supported configuration. Same type as the existing 2 GB.
My question is can I keep the 2 GB for a total of 14 GB?
14 GB is not listed as a supported configuration, but then again, neither is the configuration which Dell sold.
Please identify whether your answer is from experiernce or assumption.
Thanks
speedstep
9 Legend
9 Legend
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47K Posts
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November 23rd, 2011 08:00
Ram should be matched from the same vendor same speed same size.
Anything else is asking for trouble.
GFF8K Assembly,Bracket,Blower,Memory Board, Memory,Riser,T7500, 2
H236F Printed Wiring Assy,Riser Vertical,6,Precision Workstation,T7500
W567F Assembly,Heatsink,Central Processor Unit,Riser,PrecisionWorkstation
Memory Type: DDR3 PC3-10600, DDR3 PC3-8500, DDR3 PC3-12800, DDR3 (ECC)
Maximum Memory: 192GB
Slots: 12
Each memory slot can hold DDR3 PC3-10600, DDR3 PC3-8500, DDR3 PC3-12800 with a maximum of 24GB kit (8GBx3) per slot.*
Supported Memory Configurations
(GB)
Ranks
(GB)
Ranks
Memory Slots
There are six memory slots on the system board. The slots are numbered DIMM1 through DIMM6. DIMM1 is furthest from the processor.
In addition, the dual-processor riser features six additional memory slots. The slots are numbered DIMM1 through DIMM6. DIMM1 is furthest from the processor.
Memory Population Rules
Your computer requires DIMMs within a channel to be populated starting with the DIMMs farthest from the processor first. This means the DIMM slots 1, 2 and 3 must be populated before DIMM slots 4, 5 and 6. In addition, when populating a Quad-rank DIMM with a Single- or Dual-rank DIMM in the same channel, the Quad-rank DIMM must be populated farthest from the CPU.
To maximize available memory bandwidth, DIMMs within a configuration should generally be spread across as many channels as possible before populating multiple DIMMs per channel. The population guidelines below help to achieve this.
Single CPU configurations (6 DIMM slots on MB)
Dual CPU configurations (6 DIMM slots on MB plus 6 DIMM slots on Riser)
theflash1932
7 Technologist
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16.3K Posts
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November 23rd, 2011 09:00
Far as I know, triple-channel memory is optimized with matching DIMM's in each channel (slots 1, 2, 3) ... why they didn't list the Supported Configurations as Optimal Configurations is hard to guess. Other configurations (including your 3x4GB+2x1GB) will probably work, but it would not be optimal. With 12GB, I'd think you'd be better off leaving the 2x1GB sticks out (or getting another 1GB for the third channel).
msmolow
2 Posts
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November 23rd, 2011 09:00
Thanks, but you've posted what I read in the User Guide. All this I knew.
The reason for my original post is since Dell sold a non-listed configuration, are other non-listed configurations possible?
bes10
1 Message
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December 17th, 2014 08:00
I dont know much about technical problems. But Dell Technical problem Assistance are so prompt and very helpful. You can truly get help from Dell.
chris89
28 Posts
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April 7th, 2015 10:00
Thanks for this information. I too have a T7500. My question is say I get 4GB x 6 of PC3-12800 which is DDR3-1600 correct? I want to make sure I know that Dual-Rank ram will allow me to achieve the 1600Mhz ram clock is this correct?
I see you mentioned Quad Rank reducing speed to max 800Mhz ... that's less than DDR3-1066 ... or is that 533Mhz at 1066 ... so 800Mhz is 1600Mhz?
I just want to make sure I can achieve peak memory performance on Dual-Rank 4GB modules at DDR3-1600 speed.
robinet
54 Posts
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April 25th, 2015 15:00
Hi,
Similar question - I hope you don't mind ;)
Right now I have 12x 8GB 2Rx4 PC3-10600R = 96GB :)
But I want to upgrade to 12x 16GB.
According to Service Manual I need Quad Rank - 4Rx4 - modules to achieve 192GB.
I've just bought 6x 16GB 2Rx4 PC3-12800R - it looks like I can't use all of them :(
With 6x modules - I can only use 4x 16GB + 8x 8GB = 128GB ... but can I use 16GB 2Rx4 and 8GB 2Rx4 or do I need to buy 16GB 4Rx4 anyway ?
TIA
cujjo
1 Message
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September 9th, 2015 21:00
Guys I'm really struggling to interpret what I need for 7500 and would greatly appreciate any advice.
Mine came with 48gb of 2Rx4 pc3-10600R and I'm looking at using what I can of that while upgrading with 1x16gb DDR3 1066MHz PC3-8500R 4R.
This stuff is so expensive I'm afraid to pull the trigger when I can't understand how it all fits together, please help.