Overclock.net › Forums › Intel › Intel CPUs › Need advice for 4GHz on a E8500
New Posts  All Forums:Forum Nav:

Need advice for 4GHz on a E8500

post #1 of 19
Thread Starter 
CPU: E8500
MOBO: GIGABYTE GA-G31M-ES2L
RAM: 2x2GB DDR2 800 (no heat spreaders)

Obviously id rather be doing this with a P45 and some more OC friendly RAM but this is what I got to work with at the moment.

So to start I have:

CPU Enhanced Halt (C1E) - Disabled
CPU Thermal Monitor 2(TM2) - Disabled
CPU EIST Function - Disabled

The highest stable I get with stock settings is 3.8GHz by only changing the Host Frequency to 400 with the default multiplier at 9.5.

As soon as try and go over that itll crash/freeze at login. So I started to mess with the CPU Voltage Control option (@ 9.5 x 425) progressively taking it up to 1.35 with the same crashing results. I tried adjusting the multiplier to 8 x 500 as well but that helped nothing in fact I crashed at 8 x 475 (3.8) even though I was stable at the previous 9.5 x 400 (3.8).

Im always making sure to either keep the RAM at stock speeds or underclocked.

So what settings and changes does this noob need to make? What mistakes am I making? Huge Thanks In Advance!

Heres my stable 3.8GHz:



Edited by iamtwan - 4/15/11 at 8:41pm
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
post #2 of 19
First, download Memtest and burn it to a CD or put it on a bootable thumbdrive. Set your BIOS to boot from that device and put your FSB @ 421, which would give you 4Ghz. Once that's set, boot to the CD/thumb drive and let Memtest test your RAM running at 842MHz for a few hours. If that passes error free you can move ahead.
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
post #3 of 19
Thread Starter 
Quote:
Originally Posted by Blacklac View Post
First, download Memtest and burn it to a CD or put it on a bootable thumbdrive. Set your BIOS to boot from that device and put your FSB @ 421, which would give you 4Ghz. Once that's set, boot to the CD/thumb drive and let Memtest test your RAM running at 842MHz for a few hours. If that passes error free you can move ahead.
Thanks for the response. Ill run Memtest when I get home from work later and report back.
Edited by iamtwan - 4/15/11 at 7:37am
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
post #4 of 19
I have a Core 2 Duo E8400 in a similar (same?) board. It's the S2L, not ES2L, so I'm not sure how they differ, but they seem/look 99% identical. I couldn't get it to 4.05GHz, but, I just gave it one half attempt. It did 3.6GHz. It's running stock right now.

I find RAM overclockability is important with this board, as there is limited memory divider and ratio control (which depends on the default speeds of the CPU FSB and RAM speed).

In my case, when I had a Pentium Dual-core in prior to the Core 2 Duo E8400, the CPU has a default FSB of 200MHz (800MHz) FSB, and it's paired with 333MHz (667MHz) RAM. Overclocking the CPU FSB, the RAM speed went up too, and that was on the lowest divider it allowed me.

Now, with the Core 2 Duo E8400, which has a FSB the same as that RAM, they're at 1:1, and I was able to get it to 3.6GHz (400MHz FSB, 800MHz RAM), but much higher, just like in your case, and it wouldn't do it.

It's a budget board. Higher FSB and dividers/ratios are it's weak spots (which is why you saw worse results at the lower multiplier with the higher FSB). Overclocking lower FSB CPUs (budget CPUs) is what it does well at so it's a budget board for budget CPUs. I'd say if you're getting 3.8GHz though, that's good enough in itself.
post #5 of 19
Whats the maximum multiplier you can have? try going for the largest one, so that the FSB isnt too high.

Also try changing the ram:cpu ratio so that the ram is slighty underclocked when you go for 4ghz. Pcie frequency should be 100mhz.

Man I wish I could go back to the days of 775 overclocking

If i reemmber correctly, my E8400 took the maximum safe limit to reach 4ghz, something like 1.3725v
post #6 of 19
Thread Starter 
Alright so I ran memtest @ 400. pretty sure it passed? going to go run it at 421 brb.


Edited by iamtwan - 4/15/11 at 7:44pm
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
post #7 of 19
Thread Starter 
Quote:
Originally Posted by $ilent View Post
Whats the maximum multiplier you can have? try going for the largest one, so that the FSB isnt too high.

Also try changing the ram:cpu ratio so that the ram is slighty underclocked when you go for 4ghz. Pcie frequency should be 100mhz.

Man I wish I could go back to the days of 775 overclocking

If i reemmber correctly, my E8400 took the maximum safe limit to reach 4ghz, something like 1.3725v
Maximum Multiplier is the default 9.5

Ive been making sure the ram is either running at rated 800 or underclocked.

Any other suggestions guys?
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
post #8 of 19
Thread Starter 
421x9.5 (4GHz) w/ RAM divider at the lowest 1.6 running underclocked at 674...Memtest crashed twice at this specific screenshot :

Is the RAM my bottleneck at this point?

    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
post #9 of 19
You can try to increase your RAM voltage .1v, maybe. Or loosen the timings a little. What is your voltage rated and what is it set at? 842MHz should be fine for 800MHz RAM, esp if your already running 6-6-6-18.
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
post #10 of 19
Thread Starter 
Quote:
Originally Posted by Blacklac View Post
You can try to increase your RAM voltage .1v, maybe. Or loosen the timings a little. What is your voltage rated and what is it set at? 842MHz should be fine for 800MHz RAM, esp if your already running 6-6-6-18.
increased the RAM voltage to .1v and it wouldnt even POST on either 842MHz or 674MHz. Dont think this mobo has the option to loosen the timings

May just be stuck at 3.8GHz until I get some new RAM or MOBO?

Thanks for the help too BTW. Appreciate it.
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 4770K ASRock Z87M Extreme4  XFX R9 390 Black Edition 16GB Corsair 
Hard DriveHard DriveCoolingOS
256GB Samsung 840 Pro Seagate 3TB Cryorig H7 Ubuntu 
MonitorKeyboardPowerCase
ASUS VG248QE 24" Logitech g710 Corsair AX 760i CM N200 
Mouse
Logitech G502 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Need advice for 4GHz on a E8500