on what exactly does PC3L / PC3U ddr3 depend on to run on at 1.35V / 1.25V? i mean, which component(s) support are required? my interest is especially on amd platform
some that i find potential are:
1. cpu's IMC
i actually don't know what IMCs role here because i'm almost completely blind about ddr3 design
but, a quick look at cpu-world.com, amd mobile cpus & opteron are mainly the ones that support DDR3L, & as far as i see, none of them supports DDR3U
so does it mean PII, AII, APU (both k10 & 15 h), FX must run such ddr3 at least at 1.5V?
2. mobo
i'm guessing this is because it's the mobo that step-down the DC voltage to the vDIMM
an example of a mobo that explicitly states its support for PC3U is asus M4A87TD/USB3 (http://www.asus.com/Motherboards/AMD_AM3/M4A87TDUSB3), so i guess supporting low-voltage ddr3 is the exception, hence mobos that don't specify this must run such ddr3 at 1.5V or higher, right?
now, the M4A87TDUSB3 product page states PII, AII, Sempron are supported, which implicitly says that one/more of those cpus support low-voltage ddr3
3. mobo chipset
i don't know how this correlates with low-voltage ddr3, but let's throw it into our topic just to make sure
from a few that i looked, mobos that support low-voltage ddr3 use amd 8-series chipsets / higher, does anybody know one that uses amd 7-series?
another question is PC3L & PC3U ddr3 are required to be able to run at 1.5V aside from their lower voltages, do all those low-voltage ddr3 on the market comply to it? (ie. they won't break at 1.5V right?)
thx
some that i find potential are:
1. cpu's IMC
i actually don't know what IMCs role here because i'm almost completely blind about ddr3 design
but, a quick look at cpu-world.com, amd mobile cpus & opteron are mainly the ones that support DDR3L, & as far as i see, none of them supports DDR3U
so does it mean PII, AII, APU (both k10 & 15 h), FX must run such ddr3 at least at 1.5V?
2. mobo
i'm guessing this is because it's the mobo that step-down the DC voltage to the vDIMM
an example of a mobo that explicitly states its support for PC3U is asus M4A87TD/USB3 (http://www.asus.com/Motherboards/AMD_AM3/M4A87TDUSB3), so i guess supporting low-voltage ddr3 is the exception, hence mobos that don't specify this must run such ddr3 at 1.5V or higher, right?
now, the M4A87TDUSB3 product page states PII, AII, Sempron are supported, which implicitly says that one/more of those cpus support low-voltage ddr3
3. mobo chipset
i don't know how this correlates with low-voltage ddr3, but let's throw it into our topic just to make sure
from a few that i looked, mobos that support low-voltage ddr3 use amd 8-series chipsets / higher, does anybody know one that uses amd 7-series?
another question is PC3L & PC3U ddr3 are required to be able to run at 1.5V aside from their lower voltages, do all those low-voltage ddr3 on the market comply to it? (ie. they won't break at 1.5V right?)
thx