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G750 Upgraders: 1.35V memory is required!

X-ROG
Level 15
Please note we fit 1.35V memory into our G750s. New Haswell CPUs require this and using 1.5V memory can cause problems along the lines of:

> Overheating
> Damage to the CPU IMC (due to the increased potential difference)
> Greater battery use than our stated values.

Also remember for every DIMM you add you increase the power consumption by 1-3W each, depending on what you buy.

Once I get ahold of a G750 to borrow for a few days I'll do an upgrade guide.
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288 REPLIES 288

thebiocity
Level 7
so i decided to finally buy another ram a kingston one hopefully its compatible 😄 question how do i get to the first and second ram slot the one under the keyboard and would it void my warranty?

I can count myself to the unlucky ones, who got an G750JW with 16GB and experienced BSODs. Before I found out that I had 2x4GB RAM for 1.5V, I used my ASUS, which was running for ~72h and experienced ~20 BSODs. I ran heavy benchmarks and memtest86+ for 10 hours. After I removed now the wrong RAM the BSODs disappeared.
Now I fear that it had a great negative impact on the lifetime of critical parts like CPU IMC. What do you think - Should I insist to replace the laptop or is it enough if I replace only the wrong RAM?

Well, a couple of BSOD wont affect much imo, but if you can't get a good dream with it then why wonder?

failsafe wrote:
I can count myself to the unlucky ones, who got an G750JW with 16GB and experienced BSODs. Before I found out that I had 2x4GB RAM for 1.5V, I used my ASUS, which was running for ~72h and experienced ~20 BSODs. I ran heavy benchmarks and memtest86+ for 10 hours. After I removed now the wrong RAM the BSODs disappeared.
Now I fear that it had a great negative impact on the lifetime of critical parts like CPU IMC. What do you think - Should I insist to replace the laptop or is it enough if I replace only the wrong RAM?


Could possibly cause some windows corruption.

It's very unlikely it caused any physical damage to any other components
USA ASUS Reseller
http://www.neteffectspc.com

failsafe
Level 7
Thanks for your reply.
Actually I wonder if it's really possible to cause any damage with 1.5V. G750 uses HM87 as chipset and Intel says that it is compatible to normal DDR3 up to 1600MHz:
http://www.intel.com/content/www/us/en/chipsets/performance-chipsets/hm87-chipset-diagram.html
Is there really a risk to damage CPU IMC as stated in the first post?

failsafe wrote:
Thanks for your reply.
Actually I wonder if it's really possible to cause any damage with 1.5V. G750 uses HM87 as chipset and Intel says that it is compatible to normal DDR3 up to 1600MHz:
http://www.intel.com/content/www/us/en/chipsets/performance-chipsets/hm87-chipset-diagram.html
Is there really a risk to damage CPU IMC as stated in the first post?


You would need to read the engineering notes to be sure, but because Intel made an effort to show 2 different paths into the CPU for the 2 different kinds of memory, I would bet that you aren't supposed to plug in the DDR3 memory into the DDR3L sockets, and the other way around. Intel likely has different requirements to support one or the other, but not both, in the same path/sockets/connections.

32137

hmscott
Level 12
The Hynix 8GB SODIMM HMT41GS6AFR8A-PB I ordered to add to the 3 that came with the JH arrived today, and it is the same part number that Asus used for the 3 that came with the JH:

Original SO-DIMM (slot 2, under back panel)
32613

New SO-DIMM (slot 1, under back panel)
32612

Works fine, and shows up like the rest:

32611

Not bad for ~$110 shipped 🙂

http://www.ebay.com/itm/New-Apple-Hynix-8GB-RAM-SODIMM-Laptop-Memory-HMT41GS6AFR8A-PB-DDR3-1600MHz-/...

Mentz
Level 7
Great hint to change RAM...
Where are all 4 socket to change ram ?
I've only found 2 near the HD (G750JX CV200H).
Maybe they are hidden to my sight...

Hi,
I replaced now my DDR3 by DDR3L RAM, 4x4GB. But I still experienced BSODs. Far less then with DDR3 but still 3 times in the last 4 days.
How can I verify if the RAM is the problem or if my hardware got damaged? Last time I used memtest86+ when I had DDR3 RAM, but it didn't find any problems. Will a new Windows 7 installation make a difference?

failsafe wrote:
Hi,
I replaced now my DDR3 by DDR3L RAM, 4x4GB. But I still experienced BSODs. Far less then with DDR3 but still 3 times in the last 4 days.
How can I verify if the RAM is the problem or if my hardware got damaged? Last time I used memtest86+ when I had DDR3 RAM, but it didn't find any problems. Will a new Windows 7 installation make a difference?


If you are now running all matching pairs, and they pass the mem test, I would think about a quick reformat to rule that out as well.