Overclock.net › Forums › Intel › Intel CPUs › Can't get past 4.0Ghz
New Posts  All Forums:Forum Nav:

Can't get past 4.0Ghz - Page 2

post #11 of 14
Thread Starter 
Core 3 failed after 47 minutes, so still not stable.
I really don't feel like going over 1.40v for this. Seems outrageous if I'm stable at 4.0 with 1.32v

Speedstep is enabled btw.

One more question, I did get stable at 4.2ghz a while back with vcore only 1.36, but that was with Turboboost on. I got 4.2 on one core only (24x175), but it meant that on four cores it was only 3.5ghz.
Is it normal that one core only is stable with 1.36v, but all four cores not ?

So what would you prefer ? Turboboost ON, with 4.2ghz on one core but only 3.5ghz on all four ? Or just leave it at 4.0ghz with Turboboost OFF ?

Lot of questions I know...many thanx btw
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
post #12 of 14
Thread Starter 
Quote:
Originally Posted by Xristo View Post
Can you up your multi to 22x ? if u enable turbo in ur bios will u get 24x ? if so i suggest running at these multi's as 21x isnt very stable even on my system 21x will not hold up at 4ghz though at 24x175 = 4.2ghz i am 100% stable .

try 22x or 24x multi for stability , for 4ghz i would suggest 1.36-1.38v u might need more .

24x167 = 4080
22x182 = 4004

If I enable TB I'll only get 24x on one single core. I still don't really get that. In prime you have to select 1 thread but all cores rise in temp and it jumps to x24
4 threads only gives x21 or 3.5ghz
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
post #13 of 14
Turbo +1 to one core vs a full multiplier across all cores may take more voltage to be stable. Forced to choose, I'd take 4GHz with turbo off, but it depends what your usage is.

There can be walls that you need a big voltage increase to get over, if temps are ok I'd keep raising it just to find out where the chips limit is. Also some multipliers are more cooperative than others, and some bclk numbers can be a problem while a higher or lower number may work fine. Experiment changing multi/bclk around to get to the same OC level.
Nehalem
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.3GHz Evga X58 3SLI 2X SLI Evga GTX 275 FTWs 756/1620/1296 6GB Mushkin Blackline 1600MHz 78720591T 
Hard DriveMonitorPower
OCZ Vertex2 60GB Sony FW900 Corsair 850TX 
  hide details  
Reply
Nehalem
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.3GHz Evga X58 3SLI 2X SLI Evga GTX 275 FTWs 756/1620/1296 6GB Mushkin Blackline 1600MHz 78720591T 
Hard DriveMonitorPower
OCZ Vertex2 60GB Sony FW900 Corsair 850TX 
  hide details  
Reply
post #14 of 14
Thread Starter 
Quote:
Originally Posted by djk11 View Post
Turbo +1 to one core vs a full multiplier across all cores may take more voltage to be stable. Forced to choose, I'd take 4GHz with turbo off, but it depends what your usage is.

There can be walls that you need a big voltage increase to get over, if temps are ok I'd keep raising it just to find out where the chips limit is. Also some multipliers are more cooperative than others, and some bclk numbers can be a problem while a higher or lower number may work fine. Experiment changing multi/bclk around to get to the same OC level.
Thanx for the help. I'll keep it at 4.0 then with TB off. Gonna tighten my ram instead. Is it true that i5 has an IMC that doesn't overclock very well ? Am I gonna get DDR2 1333 stable at around 1500 ?
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
The Thing
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 750 @4.0Ghz Gigabyte GA-P55-US3L GTS450 Corsair XMS3 4gb @1.64v 
Hard DriveOSMonitorPower
4x WD 500Gb + 1.5Tb Seagate Win7 Ultimate x64 Samsung Syncmaster 2243 NW / HP L1925 Corsair TX850v2 
Case
Antec 900 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Can't get past 4.0Ghz