GA-H55M-UD2H Rev 1.0 Disabling Memory Slots

[Radar5k]

Hey gang,

I'm having a bit of a problem with Bios disabling memory slots when trying to use XMP

Specs...

Mobo: GA-H55M-UD2H Rev 1.0
Bios: F11
CPU: Intel Core i7 875k
Memory: G.Skill RipjawsZ F3-17000CL9Q-16GBZH (4 x 4GB) XMP Profile1 = 2004MHz, Profile 2 = 2133 MHz

All works fine when using standard settings, with SPD at 1600MHz, but when I try and use XMP Profile1, the memory is detected in all 4 slots, but only slots 1 and 2 are enabled in Bios.

I've tried using sticks in only slots 1 & 3, and Profile1 works on warm boot, but on cold boot, it gets confused. On cold boot, Bios shows that there is RAM in slots 1 & 3, but slot 3 gets disabled, and slot 2 gets enabled with 4GB, (even though it shows that slot 2 is empty).

This kind of weirdness is beyond my ability to fathom, so any help would be greatly appreciated.

Have fun!

Radar5k  =8^)

[Gloup_Gloup]

Hi Radar5k,  

Have you tried in XMP profile use Command Rate 2T?
Try with this....

Otherwise:
This is your RAM?
[ RipjawsZ ] F3-17000CL9Q-16GBZH (4Gx4)
http://www.gskill.com/products.php?index=438

Extract of SPECS:
CPU 2nd and 3rd Generation Intel Core Processors
M/B Chipset  Intel Z77 / Z75 / X79 / Z68 / P67


But it so happens that you have a first generation processor.
http://ark.intel.com/fr/products/48499
And your chipset is not mentioned in the list RipjawsZ ..

(But it's okay, it's just that I wanted to give information to other users of the forum, which could help you.)

In XMP profile, do you have these settings:
2133 MHz
Latency 9-11-10-28
Voltage 1.65V
Whit the Command Rate at 2T?

You find a manual here:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-h55m-ud2h_e.pdf

Check in page 16, infos about RAM installation.

[Radar5k]

Hey Gloup_Gloup,

Thanks for your quick reply:)

I'd read through those sites, and dropped a message on the G.Skill forum before buying the RAM, where one forum member said that I'd have a hard time using the profiles, but shuold be able to get around 1800MHz with a bit of judicious overclocking. Problem is, my overclocking skills are seriously underwhelming, so I figured that it was worth trying the profiles first.

I installed the 4 sticks, and checked the settings in Profile1, and yes, the Command Rate was set to 2T, but ended up with the same results (Slots 1 & 2 detected and enabled, slots 3 & 4 detected and disabled).

I tried manually setting RAM voltage to 1.64 (it only goes up in steps of 2), and QPI/VTT voltage to 1.05, but got the same results again.

Whilst changing the voltages, I noticed that both the RAM  and QPI/VTT voltage settings had a "Normal" setting, and tried those, and now the 4 sticks are running at 2004MHz (Profile1) at cold boot It still doesn't like Profile2, which has the RAM running at 2136MHz, but that's fine

I'll set it back to XMP Disabled for now, and will go back to Profile1 next weekend, and slap it around the head with a bunch of test utilities, just to see what it can take... If it handles those with no worries, then I'm set, and we can call this one solved

So, to recap the settings...

MIT >> Advanced Memory Settings >> XMP: "Profile1"
MIT >> Advanced Memory Settings >> Performance Enhance; "Standard"
MIT >> Advanced Voltage Settings >> QPI/VTT: "Normal"


Have fun!

Radar5k  =8^)