Pavilion Chromebook 14 (Butterfly) Q&A session

[mrnuke]

I have some questions about this little guy. Fear not, your answers will be 
ported to the coreboot wiki at my earliest convenience.

1. What is the maximum amount of RAM that it supports? Can in take in 2 x 8GiB 
modules? If so, are there any limitations as to the number of ranks?

2. Are the slots dual channel, or are both slots routed to same channel? (From 
the source, I think it's dual.)

3. If I install 1.35 V capable DIMMs, will coreboot run them at 1.35 V, or is 
1.5 V the only option?

4. If ECC modules are installed, will coreboot be able to enable ECC, or are 
those pins not even routed ?

5. Why is SATA speed limited to 6Gbps (see devicetree.cb) ? From my 
understanding, the first SATA port on the chipset is 6G capable, as is the SSD 
shipping inside. Is this a board routing limitation, or copypasta? I can 
submit a patch if it's the latter.

Thanks,
Alex

[mrnuke]

On Monday, January 20, 2014 12:37:30 PM you wrote:
> I have some questions about this little guy. Fear not, your answers will be
> ported to the coreboot wiki at my earliest convenience.
> What is the maximum amount of RAM that it supports? Can in take in 2 x
>
> 8GiB modules? If so, are there any limitations as to the number of ranks?
> Are the slots dual channel, or are both slots routed to same channel?
>
> (From the source, I think it's dual.)
> If I install 1.35 V capable DIMMs, will coreboot run them at 1.35 V, or
>
> is 1.5 V the only option?
> If ECC modules are installed, will coreboot be able to enable ECC, or are
>
> those pins not even routed ?
> Why is SATA speed limited to 6Gbps (see devicetree.cb) ? From my
>
> understanding, the first SATA port on the chipset is 6G capable, as is the
> SSD shipping inside. Is this a board routing limitation, or copypasta? I
> can submit a patch if it's the latter.

6. Why is the max_ddr3_freq declared as 1600MHz when Intel's product page [1] 
claims the CPU can do 1333 Max. Copypasta, or truly 1600 MHz capable ?

[1] http://ark.intel.com/products/56056/
> Thanks,
> Alex

[David Hubbard]

On Mon, Jan 20, 2014 at 11:48 AM, mrnuke  wrote:
> On Monday, January 20, 2014 12:37:30 PM you wrote:
> > I have some questions about this little guy. Fear not, your answers will
>
> be
> > ported to the coreboot wiki at my earliest convenience.
> > What is the maximum amount of RAM that it supports? Can in take in 2 x
> >
> > 8GiB modules? If so, are there any limitations as to the number of ranks?
> > Are the slots dual channel, or are both slots routed to same channel?
> >
> > (From the source, I think it's dual.)
> > If I install 1.35 V capable DIMMs, will coreboot run them at 1.35 V,
>
> or
> > is 1.5 V the only option?
> > If ECC modules are installed, will coreboot be able to enable ECC, or
>
> are
> > those pins not even routed ?
> > Why is SATA speed limited to 6Gbps (see devicetree.cb) ? From my
> >
> > understanding, the first SATA port on the chipset is 6G capable, as is
>
> the
> > SSD shipping inside. Is this a board routing limitation, or copypasta? I
> > can submit a patch if it's the latter.

Is this a typo? Did you mean the SATA is speed limited to 3Gbps?
> Why is the max_ddr3_freq declared as 1600MHz when Intel's product page
>
> [1]
> claims the CPU can do 1333 Max. Copypasta, or truly 1600 MHz capable ?
>
> [1] http://ark.intel.com/products/56056/