Hi,
I posted this over in the memory forum originally, but it was suggested I post here to try and get some of the more overclocking orientated guys interested (and maybe a response from the man himself?
). Here's the original thread.
And my OP on the other forum spoilered for convenience below:
Cheers!
I posted this over in the memory forum originally, but it was suggested I post here to try and get some of the more overclocking orientated guys interested (and maybe a response from the man himself?
). Here's the original thread.And my OP on the other forum spoilered for convenience below:
Hi, hoping for some help with my difficulties with this kit.
System specs are below:
i7 3770k (custom water cooled)
Teamgroup 2600mhz c10 2 x 4gb
Asus M5F
MSI Lightning 6970
SoundBlaster Z
Seasonic 750w
I am unable to get the kit prime blend stable (7000mb allocated 24 hour test) at stock timings and volts. I have managed to get close, but not quite stable.
The defaults on this kit are 10-12-12-31 @ 2600mhz 1.65v. According to the Teamgroup and the OCUK site its supposed to be 1T command rate, however XMP is programmed at 2T. Changing this manually to 1T made no difference to stability though, a pass is still a pass and a fail is still a fail.
I've done loads of testing over the last 3 or 4 weeks as I've not had a memory kit capable of even 2400mhz before, so had to ensure my IMC can cope. I actually seem to have lucked out here as it goes right up to 2666mhz stable using default volts for vccsa and vccio. I have however tested the failing prime configs below using 1.1v vccsa and 1.2vccio and it made no difference. All testing below is at stock cpu speed.
Test results are below:
XMP / Auto : 2600mhz 10-12-12-31-2T 1.65v/1.2vccsa/1.25vccio Fails within 30 mins
2400mhz 9-11-11-28-1T 1.65v - Fails within 10-30 mins
2400mhz 10-12-12-31-1T 1.62v - Pass 24 hours
2600mhz 11-13-13-35-1T 1.65v - Pass 24 hours
2600mhz 10-12-12-31-1T 1.65v - Fails within 5-15 mins
2666mhz 11-13-13-35-1T 1.65v - Pass 24 hours
2800mhz 11-14-14-35-2T 1.65v - Boots to windows, not stable in the least.
I freely admit that i'm in uncharted ground here...I've had no experience of tweaking memory above 2200mhz before, so its possible there's a key timing or setting hidden somewhere in bios that I'm unaware of (Dram CLK period from 5 to 7 was the key for stability at 2600/2666 for example, it took me a good few days to figure that out!). To try and remove this possibility I have tested using spd, xmp, board auto settings and using the Samsung and TridentX presets (TridentX particularly sets very lax subtimings including LB14). I have found stable subs using the reduced primary timings listed as stable above though, so i'm as confident as I can be that i've done as much as I can to mitigate this possibility.
I've put in a webnote a few minutes ago to see what the OCUK techs can suggest, but thought I'd open this to the floor while I wait for a reply .
Many Thanks!
System specs are below:
i7 3770k (custom water cooled)
Teamgroup 2600mhz c10 2 x 4gb
Asus M5F
MSI Lightning 6970
SoundBlaster Z
Seasonic 750w
I am unable to get the kit prime blend stable (7000mb allocated 24 hour test) at stock timings and volts. I have managed to get close, but not quite stable.
The defaults on this kit are 10-12-12-31 @ 2600mhz 1.65v. According to the Teamgroup and the OCUK site its supposed to be 1T command rate, however XMP is programmed at 2T. Changing this manually to 1T made no difference to stability though, a pass is still a pass and a fail is still a fail.
I've done loads of testing over the last 3 or 4 weeks as I've not had a memory kit capable of even 2400mhz before, so had to ensure my IMC can cope. I actually seem to have lucked out here as it goes right up to 2666mhz stable using default volts for vccsa and vccio. I have however tested the failing prime configs below using 1.1v vccsa and 1.2vccio and it made no difference. All testing below is at stock cpu speed.
Test results are below:
XMP / Auto : 2600mhz 10-12-12-31-2T 1.65v/1.2vccsa/1.25vccio Fails within 30 mins
2400mhz 9-11-11-28-1T 1.65v - Fails within 10-30 mins
2400mhz 10-12-12-31-1T 1.62v - Pass 24 hours
2600mhz 11-13-13-35-1T 1.65v - Pass 24 hours
2600mhz 10-12-12-31-1T 1.65v - Fails within 5-15 mins
2666mhz 11-13-13-35-1T 1.65v - Pass 24 hours
2800mhz 11-14-14-35-2T 1.65v - Boots to windows, not stable in the least.
I freely admit that i'm in uncharted ground here...I've had no experience of tweaking memory above 2200mhz before, so its possible there's a key timing or setting hidden somewhere in bios that I'm unaware of (Dram CLK period from 5 to 7 was the key for stability at 2600/2666 for example, it took me a good few days to figure that out!). To try and remove this possibility I have tested using spd, xmp, board auto settings and using the Samsung and TridentX presets (TridentX particularly sets very lax subtimings including LB14). I have found stable subs using the reduced primary timings listed as stable above though, so i'm as confident as I can be that i've done as much as I can to mitigate this possibility.
I've put in a webnote a few minutes ago to see what the OCUK techs can suggest, but thought I'd open this to the floor while I wait for a reply .
Many Thanks!
Cheers!
