Hi there
This is a first post and a pretty long one . I have searched the forums and the web for a possible answer but have been unable to, so here we go.
The problem: When using a kit of 8GB I cannot get the specified timings with each kit unless I set them manually and I cannot get the specified timings at all when using 2 kits (16GB), it crashes when I use manual timings.
RAM Modules: G-Skill F3-12800CL7D-8GBSR (2x4GB) (2 Sets) 16GB - The four serial numbers are sequential
Motherboard: Gigabyte GA-Z68X-UD7-B3
Bios Version: F9C
Bios Versions used to try and fix problem: F4, F8, F9C
GPU: Sapphire HD6970 x 2
CPU: i7 2600K @ 4.0GHz
CPU: Cooling: Corsair H100 Extreme Closed Loop Water
PSU: Silverstone Strider Gold 1200W
OS: Windows 7 Enterprise 64 Bit
Both G-Skill and Gigabyte list this RAM as being on the QVL and advertise this as such on their sites
History: This system has been running with 8 GB Corsair Ram (4x 2GB which was part of a triple channel kit). This RAM worked in both XMP and manual settings and to the specifications and timings as outlined in their relative data sheets. The system was running successfully and stable with overclocks of 5.1GHz with suitable voltages and settings to facilitate the stability.
Today I received my new G-Skill RAM modules that I imported from Australia (I couldn’t find any in New Zealand) and accordingly set to installing them into my system. Powered down, removed power cord waited for about 10 minutes then removed existing RAM, inserted new RAM in all four slots, The first pack into modules 1 and 3, the second pack into modules 2 and 4.
I reapplied power to the system and cleared the CMOS via the motherboard button. Entered the BIOS and set the machine up with the following settings:
4Ghz - 40/100
VCore - 1.30v
LLC – 7
QPI-VTT - 1.18v
CPU PLL - 1.56v
As I did with my previous RAM, I set the timings manually, and the system would not start. It shuts down during POST and applies a default BIOS setting and advises that overclocking or voltage changes have caused instability.
It eventually cycles through to windows and CPU-z advises that the timings are 11-11-11-28. Once again I reboot and set the Memory to XMP profile and leave everything on automatic. Windows loads and CPU-z reveals timings of 8-8-7-24. I restart the machine and manually set the timings to 7-8-7-24 – the machine refuses to post and cycles through its overclock routine then starts with CPU-z sitting at 11-11-11-28.
To establish if there is fault with any of the Modules I then set up the four modules in their two sets and apply them as an 8GB setting’s and go through the same routine as with the 16GB. I tried each pair in slots 1 and 3 then 2 and 4, then combined one of each pair and vice versa and tried them in the various slot configurations. All tests revealed the same results:
When run in XMP mode with all other memory settings on Auto, the memory would show up in CPU-z as 8-8-7-24.
When run up with XMP disabled it would start up as 11-11-11-28. When the timings were forced with either XMP on or off the timings in CPU-z would read 7-8-7-24. This is the only time it would show up as such.
In an effort to try and resolve I reverted to BIOS default settings (fail safe settings) and only changed the Memory settings as outlined below.
16GB Default BIOS settings XMP Disabled - CPU-z = 11-11-11-28
16GB Default BIOS settings XMP Enabled - Profile 1 (7-8-7-24) - CPU-z = 8-8-7-24
16GB Default BIOS settings XMP Enabled - Profile 1 CAS forced to 7-8-7-24 Fails to boot to windows - crashes with Overlcock/overvoltage failure - defaults to standard BIOS and loads windows CPU-z = 11-11-11-28
16GB If I set the BIOS to default without XMP then BIOS says standard is 11-11-11-28
If I set BIOS to default with XMP enabled then BIOS says standard is 7-8-7-24 but always shows up as 8-8-7-24
16Gb If I set the timings manually to 7-8-7-24 the BIOS shows this as set but crashes when trying to POST
8GB Default BIOS settings XMP Disabled - BIOS shows 11-11-11-28 - CPU-z = 11-11-11-28
8GB Default BIOS settings XMP Enabled –BIOS shows 7-8-7-24 CPU-z = 8-8-7-24
8GB Default BIOS settings XMP Enabled – Set Timings manually - BIOS shows 7-8-7-24 – CPU-z = 7-8-7-24
I did do a memory test with Windows 7 memory checker which revealed no problems on any of the modules
So, the questions are;
why is it when in XMP the modules load up as 8-8-7-24 instead of the intended 7-8-7-24?
why can I not use manual settings to get 7-8-7-24 when using all four sticks?
how can I set this motherboard/ram configuration up so that I can use manual settings to the specs as advertised, namely 7-8-7-24, while using my 16GB of RAM?
If not, is this something a BIOS upgrade could fix or is an issue that needs to be resolved by buying paired sticks of RAM?
I know this is long winded but I feel it gives the best description of what is happening and allows for an informed answer straight off without the need for the ‘try this and try that’ configuration.
Thanks in advance for any help offered.
regards
~LL~
This is a first post and a pretty long one . I have searched the forums and the web for a possible answer but have been unable to, so here we go.
The problem: When using a kit of 8GB I cannot get the specified timings with each kit unless I set them manually and I cannot get the specified timings at all when using 2 kits (16GB), it crashes when I use manual timings.
RAM Modules: G-Skill F3-12800CL7D-8GBSR (2x4GB) (2 Sets) 16GB - The four serial numbers are sequential
Motherboard: Gigabyte GA-Z68X-UD7-B3
Bios Version: F9C
Bios Versions used to try and fix problem: F4, F8, F9C
GPU: Sapphire HD6970 x 2
CPU: i7 2600K @ 4.0GHz
CPU: Cooling: Corsair H100 Extreme Closed Loop Water
PSU: Silverstone Strider Gold 1200W
OS: Windows 7 Enterprise 64 Bit
Both G-Skill and Gigabyte list this RAM as being on the QVL and advertise this as such on their sites
History: This system has been running with 8 GB Corsair Ram (4x 2GB which was part of a triple channel kit). This RAM worked in both XMP and manual settings and to the specifications and timings as outlined in their relative data sheets. The system was running successfully and stable with overclocks of 5.1GHz with suitable voltages and settings to facilitate the stability.
Today I received my new G-Skill RAM modules that I imported from Australia (I couldn’t find any in New Zealand) and accordingly set to installing them into my system. Powered down, removed power cord waited for about 10 minutes then removed existing RAM, inserted new RAM in all four slots, The first pack into modules 1 and 3, the second pack into modules 2 and 4.
I reapplied power to the system and cleared the CMOS via the motherboard button. Entered the BIOS and set the machine up with the following settings:
4Ghz - 40/100
VCore - 1.30v
LLC – 7
QPI-VTT - 1.18v
CPU PLL - 1.56v
As I did with my previous RAM, I set the timings manually, and the system would not start. It shuts down during POST and applies a default BIOS setting and advises that overclocking or voltage changes have caused instability.
It eventually cycles through to windows and CPU-z advises that the timings are 11-11-11-28. Once again I reboot and set the Memory to XMP profile and leave everything on automatic. Windows loads and CPU-z reveals timings of 8-8-7-24. I restart the machine and manually set the timings to 7-8-7-24 – the machine refuses to post and cycles through its overclock routine then starts with CPU-z sitting at 11-11-11-28.
To establish if there is fault with any of the Modules I then set up the four modules in their two sets and apply them as an 8GB setting’s and go through the same routine as with the 16GB. I tried each pair in slots 1 and 3 then 2 and 4, then combined one of each pair and vice versa and tried them in the various slot configurations. All tests revealed the same results:
When run in XMP mode with all other memory settings on Auto, the memory would show up in CPU-z as 8-8-7-24.
When run up with XMP disabled it would start up as 11-11-11-28. When the timings were forced with either XMP on or off the timings in CPU-z would read 7-8-7-24. This is the only time it would show up as such.
In an effort to try and resolve I reverted to BIOS default settings (fail safe settings) and only changed the Memory settings as outlined below.
16GB Default BIOS settings XMP Disabled - CPU-z = 11-11-11-28
16GB Default BIOS settings XMP Enabled - Profile 1 (7-8-7-24) - CPU-z = 8-8-7-24
16GB Default BIOS settings XMP Enabled - Profile 1 CAS forced to 7-8-7-24 Fails to boot to windows - crashes with Overlcock/overvoltage failure - defaults to standard BIOS and loads windows CPU-z = 11-11-11-28
16GB If I set the BIOS to default without XMP then BIOS says standard is 11-11-11-28
If I set BIOS to default with XMP enabled then BIOS says standard is 7-8-7-24 but always shows up as 8-8-7-24
16Gb If I set the timings manually to 7-8-7-24 the BIOS shows this as set but crashes when trying to POST
8GB Default BIOS settings XMP Disabled - BIOS shows 11-11-11-28 - CPU-z = 11-11-11-28
8GB Default BIOS settings XMP Enabled –BIOS shows 7-8-7-24 CPU-z = 8-8-7-24
8GB Default BIOS settings XMP Enabled – Set Timings manually - BIOS shows 7-8-7-24 – CPU-z = 7-8-7-24
I did do a memory test with Windows 7 memory checker which revealed no problems on any of the modules
So, the questions are;
why is it when in XMP the modules load up as 8-8-7-24 instead of the intended 7-8-7-24?
why can I not use manual settings to get 7-8-7-24 when using all four sticks?
how can I set this motherboard/ram configuration up so that I can use manual settings to the specs as advertised, namely 7-8-7-24, while using my 16GB of RAM?
If not, is this something a BIOS upgrade could fix or is an issue that needs to be resolved by buying paired sticks of RAM?
I know this is long winded but I feel it gives the best description of what is happening and allows for an informed answer straight off without the need for the ‘try this and try that’ configuration.
Thanks in advance for any help offered.
regards
~LL~
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