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- Thread starter richard.dzavoronok
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That's right, I hoped for offers from adjacent countries 
I'm looking for some decent offers for a while now, but no luck. Plenty of standard DDR3 unbuffered at 'decent' prices, but no low voltage ones. I'm trying to make my R220s as low power as possible.
Thanks for offer, I'll get back to you if I don't find anything reasonable.
I'm looking for some decent offers for a while now, but no luck. Plenty of standard DDR3 unbuffered at 'decent' prices, but no low voltage ones. I'm trying to make my R220s as low power as possible.Thanks for offer, I'll get back to you if I don't find anything reasonable.
Current 8gb stick I have installed says 1.5V specs, but the system info says, that it's running at 1.35V. That's why I was searching for low voltage.
I found this article from tom's hardware How Much Power Does Low-Voltage DDR3 Memory Really Save?. Quite old and on consumer setup, but I think I'll just install another 1.5V sticks, as (by the article findings) consumption is lowered by ~0.5W per stick in idle. Not much given the price difference.
That does not sound like its worth the effort.
If it's 1W total and you have to pay €10 per stick you'll need 4 to 8 years (0,25-0,50€/kWh) to break even. Ok less if u sell the old sticks, but ...
If it's 1W total and you have to pay €10 per stick you'll need 4 to 8 years (0,25-0,50€/kWh) to break even. Ok less if u sell the old sticks, but ...
That's what I was thinking after I found that article.
The cheapest dd3l sticks I found was around €20 (without shipping) so double that numbers. So it seems it's not worth the effort.
"Normal" DDR3 sticks I can get for ~€18 per stick locally (including shipping).
I'll make this thread expired as there is not significant difference between what I can get locally.
The cheapest dd3l sticks I found was around €20 (without shipping) so double that numbers.
So it seems it's not worth the effort."Normal" DDR3 sticks I can get for ~€18 per stick locally (including shipping).
I'll make this thread expired as there is not significant difference between what I can get locally.
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If the spec on your module is 1.5v, it shouldn't run at 1.35v as most 1.5v modules can't also run at 1.35v, while the 1.35v ones can run at 1.5v.
If this is the case, you may simply have a module that is labelled 1.5v, but is in reality a 1.35v module. So I think it would warrant searching for another identical module and you might get what you want for even cheaper.
As far as saving power, I think what's most important is the load when doing these type of calculations because the savings at full load are going to be something to consider vs at idle.
From the graphs in article it looks like difference is ~3W at peak power (Prime 95) for whole system.
Testing system has two sticks, so ~1.5W per stick at 1600MHz (12800 memory).
It also looks like good way to save power is to use slower 1.5V memory as difference at peak power between 1333 (10600) vs 1600 (12800) was ~2W. Maybe even higher difference if using 8500?
Would be interesting to test 1.35V 8500E vs 1.5V 14900E.
I also found this guy: Dell PowerEdge R220 unsupported memory configuration
Had problem with mixing DDR3 and DDR3L memories and I'm not sure right now.
Is it OK to continue in this conversation and my findings in this thread?
Testing system has two sticks, so ~1.5W per stick at 1600MHz (12800 memory).
It also looks like good way to save power is to use slower 1.5V memory as difference at peak power between 1333 (10600) vs 1600 (12800) was ~2W. Maybe even higher difference if using 8500?
Would be interesting to test 1.35V 8500E vs 1.5V 14900E.
I also found this guy: Dell PowerEdge R220 unsupported memory configuration
Had problem with mixing DDR3 and DDR3L memories and I'm not sure right now.
Is it OK to continue in this conversation and my findings in this thread?
Why wouldnt it be ok, its your thread
O/c a new one in the appropriate section linked from this one would be cleaner, but who's gonna complain
O/c a new one in the appropriate section linked from this one would be cleaner, but who's gonna complain
I could see this happening hence why I was recommending you just get another module of what you have since you can run it at 1.35v.