Tweet
Hello there, im new to this forum but i'm really in need of i7 expert advice.
Heres my story :
FYI : Here's my rig (i'll updage my signature later :p)
CPU : Intel Core i7 920 D0 Stepping Quad Core Processor LGA1366 2.66GHZ Bloomfield 8MB
Motherboard : GIGABYTE GA-EX58-UD5
RAM : OCZ XTC Platinum OCZ3P1333LV6GK DDR3-1333 6GB 3X2GB CL7-7-7-20 Triple Channel Memory Kit DDR3
PSU : CORSAIR CMPSU-620HX 620W ATX12V v2.2 and EPS12V 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC Compatible with Core i7 Power Supply
CASING : Cooler Master HAF 932
Heatsink : Noctua NH-U12P SE1366 LGA1366 i7 Heatpipe Cooler
-----
I've recieve my new rig and i've been playing with it since the last few days.
With my chip to reach 4.0 Ghz i've come to the fact that it would need more than 1.3 volt to get it stable.
Since it's a computer that will be ON most of the time (24/7) i want the more reliable overclock possible. (I like overlocking, but not at the cost of high overvoltage dose)
So i've look for a way to reach 3.8 Ghz with the minimum voltage i could to be stable.
After a lot of try&reboot i've come to achieve a rock stable overclock of 3.8Ghz with less than 1.15 volt :) Temps under full load are realy good too when i compare with others i7 920 OC of 3.8 i found on the net.
[181 x 20, HT ON, TURBO ON, QPI MULTI X 20, UNCORE MULTI X 17]
Mission accomplished ? Well, not completly.
My RAM is rated at 1333, and right now i got it running (in my actual overclock) with a mem multi x6, wich gives DDR3-1086 speed at 6.64v
Here begin another quest to reach higher mem frequency without many modifications to my CPU/QPI overlock.
After some tweaking i'm running now with a x8 mem (DDR-1448) , but with lower timings of 8-8-8-21.
Seems stable but i didnt run any windows benchtest atm.
Here's a weird trick... maybe someone will find a way to make me 7-7-7-21 with it :
If i try to boot from "cold" (computer is off, press power button, starting...) it wont boot (or post, i cant make it to the bios screen) with memory settings of 7-7-7-21.
Then, i tried someting weird, and it worked : I started the computer with 8-8-8-21 settings, then on boot i go into the bios, change the timings for 7-7-7-21, save & exit and since i didnt play with voltage the computer dont stop itself, it stay ON and it boot again at 7-7-7-21, and its working ! , it pass memtest 45 mins, and if i dont start memtest and go into windows it will boot.
But after a memtest when i hit escape and the computer turns off before a reboot, it wont boot again.
It's like if there's something that isnt enough for the computer to boot from cold state but once power is in i can go 7-7-7-21 without any problemes, i just cant turn the power off.
Any idea ? =/ Since 7-7-7 seems to work (memtest at least) i would like to investigate further but if i cant reboot i'll forget about it. And if i can't make it the question is what is better : DDR-1088 at 7-7-7-19 or DDR-1448 at 8-8-8-21 :(
Heres my story :
FYI : Here's my rig (i'll updage my signature later :p)
CPU : Intel Core i7 920 D0 Stepping Quad Core Processor LGA1366 2.66GHZ Bloomfield 8MB
Motherboard : GIGABYTE GA-EX58-UD5
RAM : OCZ XTC Platinum OCZ3P1333LV6GK DDR3-1333 6GB 3X2GB CL7-7-7-20 Triple Channel Memory Kit DDR3
PSU : CORSAIR CMPSU-620HX 620W ATX12V v2.2 and EPS12V 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC Compatible with Core i7 Power Supply
CASING : Cooler Master HAF 932
Heatsink : Noctua NH-U12P SE1366 LGA1366 i7 Heatpipe Cooler
-----
I've recieve my new rig and i've been playing with it since the last few days.
With my chip to reach 4.0 Ghz i've come to the fact that it would need more than 1.3 volt to get it stable.
Since it's a computer that will be ON most of the time (24/7) i want the more reliable overclock possible. (I like overlocking, but not at the cost of high overvoltage dose)
So i've look for a way to reach 3.8 Ghz with the minimum voltage i could to be stable.
After a lot of try&reboot i've come to achieve a rock stable overclock of 3.8Ghz with less than 1.15 volt :) Temps under full load are realy good too when i compare with others i7 920 OC of 3.8 i found on the net.
[181 x 20, HT ON, TURBO ON, QPI MULTI X 20, UNCORE MULTI X 17]
Mission accomplished ? Well, not completly.
My RAM is rated at 1333, and right now i got it running (in my actual overclock) with a mem multi x6, wich gives DDR3-1086 speed at 6.64v
Here begin another quest to reach higher mem frequency without many modifications to my CPU/QPI overlock.
After some tweaking i'm running now with a x8 mem (DDR-1448) , but with lower timings of 8-8-8-21.
Seems stable but i didnt run any windows benchtest atm.
Here's a weird trick... maybe someone will find a way to make me 7-7-7-21 with it :
If i try to boot from "cold" (computer is off, press power button, starting...) it wont boot (or post, i cant make it to the bios screen) with memory settings of 7-7-7-21.
Then, i tried someting weird, and it worked : I started the computer with 8-8-8-21 settings, then on boot i go into the bios, change the timings for 7-7-7-21, save & exit and since i didnt play with voltage the computer dont stop itself, it stay ON and it boot again at 7-7-7-21, and its working ! , it pass memtest 45 mins, and if i dont start memtest and go into windows it will boot.
But after a memtest when i hit escape and the computer turns off before a reboot, it wont boot again.
It's like if there's something that isnt enough for the computer to boot from cold state but once power is in i can go 7-7-7-21 without any problemes, i just cant turn the power off.
Any idea ? =/ Since 7-7-7 seems to work (memtest at least) i would like to investigate further but if i cant reboot i'll forget about it. And if i can't make it the question is what is better : DDR-1088 at 7-7-7-19 or DDR-1448 at 8-8-8-21 :(
Comment