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Can AMD 1055T take 8 Gb sticks ?

post #1 of 38
Thread Starter 
Simple question to which I did not spot an answer after short googling - can AMD Phenom II CPU in AM3 socket work with 32 Gb of RAM (4x 8 Gb).

The CPU and Mobo are at the sig rig. I have 16 Gb (and do stuff that uses that RAM actually) and are wondering if I can extend the life of my current setup for a little while more my upgrading RAM or its not an option on AM3/AM3+ platform and I would need to go either Opteron or Intel for more RAM ? I'm not particulaly keen on either bcos of the cost and Opteron does not overclock (bcos the motherboards lack the OC features).

As far as I understand the RAM is directly connected to memory controller which is part of CPU so I guess the question is if AMD current gen CPU memory controllers can handle non ECC non registered 8 Gb RAM sticks.

The RAM sticks in question are Corsair DDR3 PC-12800 1600MHz 8GB CL10 (10-10-10-27) Vengeance 1x8Gb.
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post #2 of 38
Memory - Maximum Memory:
16 GB 1866 MHz Dual Channel DDR3

That is the max for your sig rig board.

Easiest way to determine maximum slot size is take Max and divide by number of slots.

So 16GB Divided by 4 Slots = Max slot size of 4GB sticks.

If you wanted more ram you need a new Rig Mobo (terrible Typo sorry).

sorry
-Nitro
Edited by NitroNarcosis - 3/6/12 at 9:49am
post #3 of 38
Thread Starter 
Quote:
Originally Posted by NitroNarcosis View Post

Memory - Maximum Memory:
16 GB 1866 MHz Dual Channel DDR3
That is the max for your sig rig board.

It should not depend on board but on AMD CPU memory controller. Or is there some chips between the DIMM sockets and the CPU ? There are none on block diagrams but these are ofc very simplified.

Has anyone tried to use 8 Gb sticks with AMD CPU ? Surely someone must have at least attempted to use such configuration?
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post #4 of 38
Quote:
Originally Posted by NitroNarcosis View Post

Memory - Maximum Memory:
16 GB 1866 MHz Dual Channel DDR3
That is the max for your sig rig board.

This.
The CPU controls the RAM, but the Motherboard has to be able to recognize it first.

Yes, the 1055 can handle 8GB sticks, but you will max out your motherboard at 2 8GB sticks.
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post #5 of 38
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Quote:
Originally Posted by PhilWrir View Post

This.
The CPU controls the RAM, but the Motherboard has to be able to recognize it first.
Yes, the 1055 can handle 8GB sticks, but you will max out your motherboard at 2 8GB sticks.

Ahh. Thats unfortunate. Thanx for the answer tho even if it was not what I was hoping for.
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post #6 of 38
Thread Starter 
It seems that 4x 8Gb requires 900 series chip-set now that I digged through gigabyte offerings for AM3+ socket.

So if I want 32 Gb I would have to upgrade my motherboard. Will have to think about it. If I have to replace the motherboard anyway then might as well go all the way to LGA2011 now that there is "cheap" 4 core available for that. Would be able to get all the way to 64 Gb with relatively cheap non-ECC non-registered RAM. Would lose 2 cores tho against 4 "virtual" cores.
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post #7 of 38
Quote:
Originally Posted by Carniflex View Post

It seems that 4x 8Gb requires 900 series chip-set now that I digged through gigabyte offerings for AM3+ socket.
So if I want 32 Gb I would have to upgrade my motherboard. Will have to think about it. If I have to replace the motherboard anyway then might as well go all the way to LGA2011 now that there is "cheap" 4 core available for that. Would be able to get all the way to 64 Gb with relatively cheap non-ECC non-registered RAM. Would lose 2 cores tho against 4 "virtual" cores.

Well, why do you need that much memory?
6-8GB is ideal for gaming right now.
I run a few VMs, do heavy programming, and multitask like mad on my 8GB and have room to spare.
16GB is basically only usable if you run VMs or other VERY heavy use tasks..

Going to 2011 is worth it from AM3.
The performance increase would be MASSIVE, and even though the second thread on a Hyper Threaded core is only about .5 cores in actual performance, the die shrink, and the fact that its Intel will give you a huge win over any AMD offering.
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post #8 of 38
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Quote:
Originally Posted by PhilWrir View Post

Well, why do you need that much memory?
6-8GB is ideal for gaming right now.
I run a few VMs, do heavy programming, and multitask like mad on my 8GB and have room to spare.
16GB is basically only usable if you run VMs or other VERY heavy use tasks..
Going to 2011 is worth it from AM3.
The performance increase would be MASSIVE, and even though the second thread on a Hyper Threaded core is only about .5 cores in actual performance, the die shrink, and the fact that its Intel will give you a huge win over any AMD offering.

I run numerical simulations (basically just systems of nonlinear partial differential equations describing some solid materials with micro-structure) on the same machine as its basically a work machine as well. It's in LAN chassis so I carry it with me to work daily (not a big problem with car). My employer has provided me a pretty reasonably specced laptop as well for work stuff but as my own machine (being a desktop and all that) is more powerful then I prefer to use this. Unfortunately, as my employer is on public funding, the budget is not particularly flexible as far as upgrades go. At least for the current year until exonomy starts recovering more and more taxpayer money is funneled this way wink.gif Have access also to Linux cluster but as its several years old the nodes (2xxx series Opterons) have only 4 Gb of RAM. Some of the stuff I do is pretty RAM heavy and when I run out of RAM the stuff gets rather slow. Even when the page-file is on SSD.

So its basically Python, MatLAB (just for making pretty pictures and some data analysys) and Mathematica that are capable from time to time to run out of RAM with 16 Gb. TBH I get by with 16 Gb as well - its just the more RAM I have the bigger (or more accurately) I can calculate.

For gaming - yeah - 8 Gb would be plenty for now and 16 Gb should be fine for at least few years into future even if 64 bit games start to emerge.

The LGA2011 looks tempting, but its also pretty expensive. I have also looked into G34 socket opterons as G34 platform is approx the same price as LGA2011 and has even higher RAM capability but it has some other downsides for me - like SSE EEB size motherboards (making carrying one with me more inconvenient as I would need poratble full tower, like CM Cosmos 2) and general lack of overclocking options (being the server platform). Parts of my code are easy to make parallel (FFT mostly) but some chunks are very much single threaded.

So in a nutshell I'll have to consider it from bang-for buck perspective. A 900 series motherboard would be approx 75 euros (+ approx 250 for 32 Gb RAM) around here while, LGA 2011 upgrade is approx 500 (mobo, CPU, cooler + 4 more 4 Gb sticks for total of 32 Gb of RAM) and a lot better single threaded performance.
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post #9 of 38
A very good reason, in deed!
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post #10 of 38
Quote:
Originally Posted by Carniflex View Post

I run numerical simulations (basically just systems of nonlinear partial differential equations describing some solid materials with micro-structure) on the same machine as its basically a work machine as well. It's in LAN chassis so I carry it with me to work daily (not a big problem with car). My employer has provided me a pretty reasonably specced laptop as well for work stuff but as my own machine (being a desktop and all that) is more powerful then I prefer to use this. Unfortunately, as my employer is on public funding, the budget is not particularly flexible as far as upgrades go. At least for the current year until exonomy starts recovering more and more taxpayer money is funneled this way wink.gif Have access also to Linux cluster but as its several years old the nodes (2xxx series Opterons) have only 4 Gb of RAM. Some of the stuff I do is pretty RAM heavy and when I run out of RAM the stuff gets rather slow. Even when the page-file is on SSD.
So its basically Python, MatLAB (just for making pretty pictures and some data analysys) and Mathematica that are capable from time to time to run out of RAM with 16 Gb. TBH I get by with 16 Gb as well - its just the more RAM I have the bigger (or more accurately) I can calculate.
For gaming - yeah - 8 Gb would be plenty for now and 16 Gb should be fine for at least few years into future even if 64 bit games start to emerge.
The LGA2011 looks tempting, but its also pretty expensive. I have also looked into G34 socket opterons as G34 platform is approx the same price as LGA2011 and has even higher RAM capability but it has some other downsides for me - like SSE EEB size motherboards (making carrying one with me more inconvenient as I would need poratble full tower, like CM Cosmos 2) and general lack of overclocking options (being the server platform). Parts of my code are easy to make parallel (FFT mostly) but some chunks are very much single threaded.
So in a nutshell I'll have to consider it from bang-for buck perspective. A 900 series motherboard would be approx 75 euros (+ approx 250 for 32 Gb RAM) around here while, LGA 2011 upgrade is approx 500 (mobo, CPU, cooler + 4 more 4 Gb sticks for total of 32 Gb of RAM) and a lot better single threaded performance.

I just finished up some work for the local university astronomy department revising the code and formulas for some AstroPhysics simulators, and I wish I had more memory in my rig for testing it.
8GB was pitifully choppy.
When you have to treat empty space as a high density fluid with a viscosity of 0, and have stupid amounts of particles to make sure the sim operates properly, RAM gets eaten up fast.

If funding is an issue for the time being, I would say if you can get a 990 Board and transfer everything over to that platform so you can add more memory by all means do so.
G34 is an option, but like you said, while it offers stability and huge multi threading performance, you lose Overclocking and single thread compared to 2011.
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