Overclock.net › Forums › Intel › Intel CPUs › E8400 help getting to 4GHz
New Posts  All Forums:Forum Nav:

E8400 help getting to 4GHz - Page 2

post #11 of 21
Quote:
Originally Posted by Technophobe View Post
Ok, so try 8 x 500 or 8.5 x 470 to get to 4GHz? Min ratio for ram is 2, so at 500 fsb my 800 ram will be running at 1000. Change timings to say 6-6-6-20 ish? Up the ram to 2.2v?
What I'm saying is you can't know if you are limited by your CPU, your FSB or your RAM because you are overclocking them altogether.

Also if your min ratio for RAM is FSB/2 then even at 500 FSB your RAM will run at half FSB speed = 250 DDR => 500 Mhz and not 1000.

So set your system to 4x445 with 1:2 RAM ratio so you know you won't ever be limited by your processor or RAM and check if it's stable.

If it is then keep your RAM ratio to 1:2 and go to 9x445. Then you know what is limitating your overclocking.
Old baby
(13 items)
 
  
CPUMotherboardGraphicsRAM
A64 3000+ 1,8@2,7 DFI Lanparty UT NF4 Ultra-D Point of View 6800 GT 2x512 ADATA PC4800 
Hard DriveOptical DriveOSMonitor
2x Raptor 74 Go 16Mo RAID 0 Combo BR/DVD Modded XP Pro SP2 32 bits Prolite B2403WS (24" LCD) 
KeyboardPowerCaseMouse
Razer Lycosa Enermax Liberty 520W Modded Thermaltake Shark Logitech G9 
Mouse Pad
Razer ExactMat + ExactRest 
  hide details  
Reply
Old baby
(13 items)
 
  
CPUMotherboardGraphicsRAM
A64 3000+ 1,8@2,7 DFI Lanparty UT NF4 Ultra-D Point of View 6800 GT 2x512 ADATA PC4800 
Hard DriveOptical DriveOSMonitor
2x Raptor 74 Go 16Mo RAID 0 Combo BR/DVD Modded XP Pro SP2 32 bits Prolite B2403WS (24" LCD) 
KeyboardPowerCaseMouse
Razer Lycosa Enermax Liberty 520W Modded Thermaltake Shark Logitech G9 
Mouse Pad
Razer ExactMat + ExactRest 
  hide details  
Reply
post #12 of 21
What is the VID of your CPU? Maybe it is one of them that cannot hit 4.0 but try raising the NB and RAM voltages as the other friends said, just in case.
Quad Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.6Ghz @1.39v L733/ E8500 ASUS Blitz Formula SE 8800 GTS 512 G92 stable @818/1917/1107 4x1GB 800Mhz Transcend Axeram N 5-5-5-15 @1066Mhz 
Hard DriveOptical DriveOSMonitor
WD 320GB SATA II+250GB Hitachi 7200rpm IDE LG DVD-RW 3ple-Boot: SuSE 10.3 - XP x64 - Vista Ultimate x64 ASUS 22" VW222S 1680x1050 
KeyboardPowerCaseMouse
Logitech MX3000 Laser Thermaltake Toughpower 750W SLI Ready Thermaltake Armor V8003SWA with 25cm side fan Logitech G9 
Mouse Pad
Alienware 
  hide details  
Reply
Quad Machine
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.6Ghz @1.39v L733/ E8500 ASUS Blitz Formula SE 8800 GTS 512 G92 stable @818/1917/1107 4x1GB 800Mhz Transcend Axeram N 5-5-5-15 @1066Mhz 
Hard DriveOptical DriveOSMonitor
WD 320GB SATA II+250GB Hitachi 7200rpm IDE LG DVD-RW 3ple-Boot: SuSE 10.3 - XP x64 - Vista Ultimate x64 ASUS 22" VW222S 1680x1050 
KeyboardPowerCaseMouse
Logitech MX3000 Laser Thermaltake Toughpower 750W SLI Ready Thermaltake Armor V8003SWA with 25cm side fan Logitech G9 
Mouse Pad
Alienware 
  hide details  
Reply
post #13 of 21
Thread Starter 
1. "How the Eff are you getting a 9.5 Multi? the max is 9!"

I know this sounds strange and everyone will say its impossible but the BIOS allows .5 multipiers for the CPU. Even at 9 as the main, I can still set .5 as the fine tuning which equates to 9.5. Now, I don't know if its a true 9.5 (probably not) but it does make a difference to performance. I even have to increase the Vcore to support it. I've even go a screen shot of what the BIOS tells me. Don't blame me if this is wrong information - I'm not Gigabyte.

2. "Also if your min ratio for RAM is FSB/2 then even at 500 FSB your RAM will run at half FSB speed = 250 DDR => 500 Mhz and not 1000."

The min BIOS multiplier is x 2 not /2. So at 400 fsb, the ram effective speed is 800. BIOS screenshot will help me explain.

3. "So set your system to 4x445 with 1:2 RAM ratio so you know you won't ever be limited by your processor or RAM and check if it's stable."

At 445, the ram min speed is 890 (over the spec of the DDR800 ram I've got). I've loosened the timings from 4-4-4-12 to 5-5-5-18 to try to rule out the ram. Maybe I should go to 6-6-6-20 or like?

Latest update: after thinking I was stable at 3.8, Orthos errors after 8 hrs blend. Bumping up the Vcore and Northbridge voltage, loosing the ram timings more and retesting to at least try to get 3.8 stable now - grrrrr.
LL
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
post #14 of 21
Quote:
Latest update: after thinking I was stable at 3.8, Orthos errors after 8 hrs blend. Bumping up the Vcore and Northbridge voltage, loosing the ram timings more and retesting to at least try to get 3.8 stable now - grrrrr
just stop and look what your saying, after 8 hours of stress testing so though that you will never do while gaming benchmarking etc. it has an error.

I'm content if my cpu is stable 8 hours long of unrealistic stress

About the multi, \\/\\/TF? is that even possible? can you post a cpu-z screenie with the 9.5multi?
    
CPUMotherboardGraphicsRAM
2600k @ 4.6ghz 1.356Vcore Gigabyte's z68x-ud3h GTX 780 ti @ 1220mhz (boost) Corsair Lowprofile 4x4GB 
Hard DriveHard DriveCoolingOS
samsung spinpoint F1(TB) + 2TB + WD 3TB OCZ 60GB SSD Scythe Mugen 2 win 7 64bit 
MonitorMonitorKeyboardPower
Samsung Syncmaster 2493HM Dell 19" tft 4:3 g15 Antec cp-850 
CaseMouseAudioAudio
Antec Twelve hundred g500 Logitech's z906 Auzentech Forte 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
2600k @ 4.6ghz 1.356Vcore Gigabyte's z68x-ud3h GTX 780 ti @ 1220mhz (boost) Corsair Lowprofile 4x4GB 
Hard DriveHard DriveCoolingOS
samsung spinpoint F1(TB) + 2TB + WD 3TB OCZ 60GB SSD Scythe Mugen 2 win 7 64bit 
MonitorMonitorKeyboardPower
Samsung Syncmaster 2493HM Dell 19" tft 4:3 g15 Antec cp-850 
CaseMouseAudioAudio
Antec Twelve hundred g500 Logitech's z906 Auzentech Forte 
  hide details  
Reply
post #15 of 21
hmm set your ram volt to 2.5 should work likedy split
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 4Ghz/35C Idle/55C Load 1.29vIdle/1.28vLoad Gigabyte EP35-DS3R Sapphire Radeon HD4850 690/1075/43C idle 2x2GB G.Skill PC2-8500/1066mhz/2.0v/5-5-5-15 
Hard DriveOptical DriveOSMonitor
WD Raptor 74gb, WD Caviar 230GB 7200rpm SATA Samsung DVDRW/CD Windows Vista Ultimate 64bit 19" Dell Monitor 
KeyboardPowerCaseMouse
Saitek Eclipse Blue Hiper HPU-4M630 630W Power Supply Antec Nine Hundred Logitech laser 800dpi 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 4Ghz/35C Idle/55C Load 1.29vIdle/1.28vLoad Gigabyte EP35-DS3R Sapphire Radeon HD4850 690/1075/43C idle 2x2GB G.Skill PC2-8500/1066mhz/2.0v/5-5-5-15 
Hard DriveOptical DriveOSMonitor
WD Raptor 74gb, WD Caviar 230GB 7200rpm SATA Samsung DVDRW/CD Windows Vista Ultimate 64bit 19" Dell Monitor 
KeyboardPowerCaseMouse
Saitek Eclipse Blue Hiper HPU-4M630 630W Power Supply Antec Nine Hundred Logitech laser 800dpi 
  hide details  
Reply
post #16 of 21
Thread Starter 
Thanks, getting some great feedback here. Keep it coming please.

1. "About the multi, \\/\\/TF? is that even possible? can you post a cpu-z screenie with the 9.5multi"

Checkout the screenshot I did of this (Gigabyte BIOS) in my previous post. It shows clearly 9.5 x 400 = 3.8GHz. Again, I'm not claiming this to be correct (I didn't write the BIOS) its just that performance increased and I had to up the Vcore for this to take effect.

2. "What is the VID of your CPU? Maybe it is one of them that cannot hit 4.0 but try raising the NB and RAM voltages as the other friends said, just in case."

Vid on mine according to coretemp is 1.1125v. Will try more NB and RAM voltages. I'm beginning to feel that I have got a CPU that unless I throw lots of voltage at it, it won't get to 4GHZ the usual 9 x 445 way.

3. "just stop and look what your saying, after 8 hours of stress testing so though that you will never do while gaming benchmarking etc. it has an error."

I've noticed quite a range of opinions about this.
From: Orthos / Prime fails after x mins but I can play the games I have so I think its stable.
To: Run Orthos / Prime for 24 hours with small FFTs and then 24 hours with blend and and if no errors, only then you can call it stable.
I'm somwhere in the middle, I was thinking 8 to 12 hours just with blend.

4. "hmm set your ram volt to 2.5 should work likedy split"

Wow. First time I've heard of anyone going that far with 2.1v max DDR ram. I didn't think the ram would need that much to behave at the higher speeds.
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
post #17 of 21
Try to set your 'System Memory Multiplier' to Auto
I had same problem as you,
If you set this to Auto and decrease your FSB a bit and try to overclock your CPU only first.
And then when you reach the highest point, oc your memory by changing Memory Multiplier.
I'm using X3110 at 445 X9 with 1.5V, I suggest you give some more voltage to stabilize your CPU.
HoN
(13 items)
 
  
CPUMotherboardGraphicsRAM
E5300 @ 3.6GHz G31-M7G DVI 4850 512MB 2GB 
Hard DriveOptical DriveOSMonitor
500GB DVDRW Windows 7 S2309W 
PowerMouseMouse Pad
500W Logitech G9 Razer Destructor 
  hide details  
Reply
HoN
(13 items)
 
  
CPUMotherboardGraphicsRAM
E5300 @ 3.6GHz G31-M7G DVI 4850 512MB 2GB 
Hard DriveOptical DriveOSMonitor
500GB DVDRW Windows 7 S2309W 
PowerMouseMouse Pad
500W Logitech G9 Razer Destructor 
  hide details  
Reply
post #18 of 21
Wow i've never seen any motherboard where the minimum FSB/RAM ratio was x2

What are the options of "system memory multiplier" ?
Old baby
(13 items)
 
  
CPUMotherboardGraphicsRAM
A64 3000+ 1,8@2,7 DFI Lanparty UT NF4 Ultra-D Point of View 6800 GT 2x512 ADATA PC4800 
Hard DriveOptical DriveOSMonitor
2x Raptor 74 Go 16Mo RAID 0 Combo BR/DVD Modded XP Pro SP2 32 bits Prolite B2403WS (24" LCD) 
KeyboardPowerCaseMouse
Razer Lycosa Enermax Liberty 520W Modded Thermaltake Shark Logitech G9 
Mouse Pad
Razer ExactMat + ExactRest 
  hide details  
Reply
Old baby
(13 items)
 
  
CPUMotherboardGraphicsRAM
A64 3000+ 1,8@2,7 DFI Lanparty UT NF4 Ultra-D Point of View 6800 GT 2x512 ADATA PC4800 
Hard DriveOptical DriveOSMonitor
2x Raptor 74 Go 16Mo RAID 0 Combo BR/DVD Modded XP Pro SP2 32 bits Prolite B2403WS (24" LCD) 
KeyboardPowerCaseMouse
Razer Lycosa Enermax Liberty 520W Modded Thermaltake Shark Logitech G9 
Mouse Pad
Razer ExactMat + ExactRest 
  hide details  
Reply
post #19 of 21
Quote:
Originally Posted by Technophobe View Post
Thanks, getting some great feedback here. Keep it coming please.

1. "About the multi, //TF? is that even possible? can you post a cpu-z screenie with the 9.5multi"

Checkout the screenshot I did of this (Gigabyte BIOS) in my previous post. It shows clearly 9.5 x 400 = 3.8GHz. Again, I'm not claiming this to be correct (I didn't write the BIOS) its just that performance increased and I had to up the Vcore for this to take effect.
BIOS screenshots mean nothing to me. I can get into BIOS with whatever Multi I want.... Once I reset BIOS, it sets it to maximum that Im allowed:9

Use a lower FSB and post at 9.5 CPUZ, I still dont believe it

but regardless

to test if your FSB is stable, Drop to a 7 or 8 multi and bump your FSB to 450/ 1800 and run a stress test at your last stable speed (change with the multi)

if it proves unstable, then unlink your RAM, run again, fail again, UP Vcore on NB to 1.4 or 1.45 depending on where you are at, also if you have a 'FSB' voltage, raise that by a notch
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom 9950 Black Edition @ 3.0Ghz Gigabyte mATX 785G? HD3200 IGP *Passively cooled* 2x1GB WINTEC Crap, 2x2GB Patriot | DDR2 800 1.9v 
Hard DriveOSMonitorKeyboard
Western Digital AAKS Series 500GB Windows 7 Enterprise x64 Custom Cooked for SPEED Samsung 58" B650 1080p Plasma Logitech DiNovo Mini 
PowerCaseMouse
Silverstone 350Watt Silent PSU Cooler Master 590 Logitech DiNovo Mini 
  hide details  
Reply
post #20 of 21
Thread Starter 
I'll try to answer your comments...

1. "Try to set your 'System Memory Multiplier' to Auto. I had same problem as you, If you set this to Auto and decrease your FSB a bit and try to overclock your CPU only first. And then when you reach the highest point, oc your memory by changing Memory Multiplier. I'm using X3110 at 445 X9 with 1.5V, I suggest you give some more voltage to stabilize your CPU."

Tried with mem multiplier to auto (with 423 fsb) and the system tried to POST 3 times and failed each time. It reset the BIOS back to safe defaults again. After a bit of testing, it seems 'Auto' is just x 2.4. I can't seem to find a way to 'unlink' the memory as other boards seem to be able to do.

I'm really only willing to go up to 1.3625v idle Vcore until 1) the prices drop and 2) I get some good use out of it.

2. "Wow i've never seen any motherboard where the minimum FSB/RAM ratio was x2. What are the options of "system memory multiplier" ?

Even though the BIOS screen shows x 2, its really just 1:1. Being DDR, its doing the normal fsb x 2. It's just Gigabytes way of showing the effective ram speed on the screen. Options are: auto (2.4 as above), 2, 2.4, 2.5, 3, 3.2, 3.33 and 4.

3. (revised) "About the multi, \\/\\/TF? is that even possible? can you post a cpu-z screenie with the 9.5multi"

There is no program that I can run that shows the 9.5 multipier. The only place it is shown is in the BIOS setup (incorrectly). After doing some more benchmarks at the 9.5 setting, the changes are not significant enough to say its a 5% improvement over 9. Oh well, Gigabyte programmers can't be perfect all the time

4. "if it proves unstable, then unlink your RAM, run again, fail again, UP Vcore on NB to 1.4 or 1.45 depending on where you are at, also if you have a 'FSB' voltage, raise that by a notch".

I can't find a way to unlink the ram so all the tests I do with lower multipliers and higher fsb's, I can't really be sure its not the ram playing up if it errors. I don't know what my current NB or FSB voltages are. I only have options to increase the default (which I'm not sure of).

I know I'm currently stable at 3.8GHz with:
9 x 423
RAM 846 (4-4-4-12)
Vcore 1.344v
DDR 2.08v
No additional FSB or NB voltage.

I will continue playing with all your suggestions from this point.
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
Main System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E3120 GA-P35-DS3P Rev 2.1 GV-N26OC-896H 4GB Corsair Dominator 1066 
Hard DriveOptical DriveOSMonitor
WD800JD (80GB) Pioneer 215 Windows Vista Ultimate 64bit Samsung 2493HM 24" 
KeyboardPowerCaseMouse
Dell wireless Antec Neopower 650W CoolerMaster HAF932 Dell wireless 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › E8400 help getting to 4GHz