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Having trouble being stable at 2.8ghz with Neo4-F & Opteron 148

post #1 of 30
Thread Starter 
Hi Guys -
I've been reading on this forum for a few weeks after a few people from other forums suggested that this forum is the BEST for quick and accurate responses.
I recently completed my new build after getting upgrading parts over the past half year. Please see my signature for the stuff (hopefully it shows up in this thread!). After fiddling around for the past 1 1/2 weeks trying to get my new Opty 148 to a stable 2.8 overclock, I'm not having too much luck. Everything seems to fail in Prime 95 after about 5 hours or less.
Without repeating too much from the signature, I'm using a MSI K8N Neo4-F motherboard with an Opteron 148 CACJE chip and G. Skill 2gb dual kit DDR500 running 3-4-4-8-1T at DDR510 speed.
Here are my settings:
-FSB 255 at 4X HTT mult
-Memory running 1:1 with FSB speed (200 setting in BIOS) with 3-4-4-8 1T timings and 2.6v (2.6v to 2.8v recommended but people say 2.5v is nice if you have that option in the bios which I do)
-CPU mult 11x with 1.497vcore (1.45 plus 3.3% special vid)
-NF4 chipset set to 1.6v (1.5v stock)
-All spreads disabled

Something here is holding me back. I am running 1.6 Platinum bios which I heard is good for OCing on the board. I've heard people getting up to 3ghz speeds stable with their OPty 148's ...maybe my stepping is not that good? I kinda think either my memory has something setup not quite right or the chipset volts is picky (it redlines at 1.75v in the bios...the most I can go is 1.7v).
Anyone have any ideas? At 1.5vcore, I'm running around ~43C under load and ~32C idle. I can probably go up to 1.55vcore and see if I'm stable there but I really don't like the added voltage cuz my temps will most likely jump up to mid to high 40's.

Thanx all.
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE 1.55vcore MSI Neo4-F with 1.6 BIOS XP 32 bit SP2 19" Fujitsu LCD FP-988D 
PowerCase
600W MGE XG Vortec @ 37a Xoxide Bio-X 
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My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE 1.55vcore MSI Neo4-F with 1.6 BIOS XP 32 bit SP2 19" Fujitsu LCD FP-988D 
PowerCase
600W MGE XG Vortec @ 37a Xoxide Bio-X 
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post #2 of 30
I'm not sure about AMD but I know Intel CPUs can handle up to 75C temps... Of course you don't want to get that high, but 50-60 is acceptable. You should look into other cooling options though if you're really worried about it.
My System
(13 items)
 
  
CPUGraphicsRAMOS
Intel Core 2 Duo E6550 nVidia GeForce GTX 650 G.Skill DDR2 PC2-6400 PK Series 4-4-4-12 Windows 7 Enterprise 
MonitorKeyboardPowerCase
Acer S201HL Logitech Deluxe 250 305W Lenovo 
MouseMouse PadAudio
MS Trackball Optical N/A OnBoard 
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My System
(13 items)
 
  
CPUGraphicsRAMOS
Intel Core 2 Duo E6550 nVidia GeForce GTX 650 G.Skill DDR2 PC2-6400 PK Series 4-4-4-12 Windows 7 Enterprise 
MonitorKeyboardPowerCase
Acer S201HL Logitech Deluxe 250 305W Lenovo 
MouseMouse PadAudio
MS Trackball Optical N/A OnBoard 
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post #3 of 30
First thing to do is to slow down your ram to ensure that is not limiting you. Do this by selecting a slower divider than the one you're on now.
If you still fail Prime then you'll need to add more vcore until it's stable.
If you pass Prime, then keep the Ram speed a bit lower, run 2T timings or increase the vdimm slightly. Also, have a play around with some of the other memory timings in the bios as these can have a big effect on memory stability as well. Leave nothing on "Auto".

If you want a quick estimate of system stability then you can run OCCT. It takes 30 mins and is excellent, particularly for CPU stability.

If you're getting around 5hrs Prime though, you're very nearly there. Prob just a little more vcore is necessary.

Edit: Also, if you're running above 250HTT, then you should drop your HT multiplier to 3x and see if that helps at all.
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
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Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
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post #4 of 30
Show a screen capture of ur cpu-z showing cpu and memory. have u checked ur current voltage on vcore? cuz if ur going by with what the bios says its sumtimes incorrect, u mite be going 1.497v but in reality ur going lower.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
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post #5 of 30
Sorry for the double post but heres sumting that u need to calculate ur ram speeds its pretty easy to use just input the numbers fsb and dividers and multi. and it will calculate the ram speeds and cpu frequency for u.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
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post #6 of 30
Quote:
Originally Posted by shortfuse
Show a screen capture of ur cpu-z showing cpu and memory. have u checked ur current voltage on vcore? cuz if ur going by with what the bios says its sumtimes incorrect, u mite be going 1.497v but in reality ur going lower.
The bios shows the correct value. Software often shows a lower voltage, but is slightly inaccurate.
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
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Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
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post #7 of 30
Its not true. i tested my psu with my multimeter its not giving me the correct voltage im at 1.45v with 9.9% it should be 1.59v but its only giving me 1.55v same as cpu-z. i guess what im saying is it depends on ur psu.

By the way with this settings im getting 34c idle and 43c full load.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Opteron 148 cab2e MSI neo4 sli plati. MSI 6800gt Gskillz pc(550) 
OSKeyboardPowerMouse
windows7 ultimate x64 M.S Bluetooth Seasonic s12 M.S Bluetooth 
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post #8 of 30
Quote:
Originally Posted by shortfuse
Its not true. i tested my psu with my multimeter its not giving me the correct voltage im at 1.45v with 9.9% it should be 1.59v but its only giving me 1.55v same as cpu-z. i guess what im saying is it depends on ur psu.
Yeah, if you've tested it with a multimeter then there's no doubt
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
  hide details  
Reply
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
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post #9 of 30
Thread Starter 
Thanx for the response guys -
Never heard of OCCT but I'll look for it on the net to download. I didn't try a 180 divider as I'd like to keep the memory at 1:1 if possible at 2.8 since I'm so close and really don't wanna knock it down to 2T over 1T cuz I heard that really lowers the performance. After all, I'm only ocing the memory a mere 10mhz total.
I really have no idea other than the standard 4 # timings and voltage as to what to mess with in the dram page but changing it from "auto". I did try upping the vdimm but I've heard it becomes unstable with too much voltage depending on the motherboard.
As for the vcore, I've noticed with the Core Center software that the vcore fluctuates + or - .05v probably due to using the special vid which makes it go up and down. My fixed vcore is maxed at 1.45v. ALthough it is set to 1.497 in bios, I notice that it drops to 1.44 sometimes in Prime and then goes back up.
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE 1.55vcore MSI Neo4-F with 1.6 BIOS XP 32 bit SP2 19" Fujitsu LCD FP-988D 
PowerCase
600W MGE XG Vortec @ 37a Xoxide Bio-X 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE 1.55vcore MSI Neo4-F with 1.6 BIOS XP 32 bit SP2 19" Fujitsu LCD FP-988D 
PowerCase
600W MGE XG Vortec @ 37a Xoxide Bio-X 
  hide details  
Reply
post #10 of 30
Quote:
Originally Posted by conqst99
Thanx for the response guys -
Never heard of OCCT but I'll look for it on the net to download. I didn't try a 180 divider as I'd like to keep the memory at 1:1 if possible at 2.8 since I'm so close and really don't wanna knock it down to 2T over 1T cuz I heard that really lowers the performance. After all, I'm only ocing the memory a mere 10mhz total.
I really have no idea other than the standard 4 # timings and voltage as to what to mess with in the dram page but changing it from "auto". I did try upping the vdimm but I've heard it becomes unstable with too much voltage depending on the motherboard.
As for the vcore, I've noticed with the Core Center software that the vcore fluctuates + or - .05v probably due to using the special vid which makes it go up and down. My fixed vcore is maxed at 1.45v. ALthough it is set to 1.497 in bios, I notice that it drops to 1.44 sometimes in Prime and then goes back up.
You only need to drop the memory speed temporarily to test whether it's the ram or the cpu that's unstable. After that you can raise it again. 2T and 1T Command Rates don't really have much effect on real world apps (maybe upto 5%), but have quite a large bearing on benchmarks. You should be able to keep 1T though. If it is your ram that's unstable then see what gives you the best performance/stability by changing the memory speed and command rate around. CPU speed should always be the main aim. Get this as high as possible and then work your memory around this and not the other way around.

There's some good info on the other memory timings at DFI Street. It's aimed at DFI boards, but just as applicable to an nF4 board. I'll edit with the URL for you in a minute.

http://www.dfi-street.com/forum/showthread.php?t=11397
Although these are often overlooked. Leaving at auto can cause instability. My games kept crashing and these settings were the culprit, so worth spending an hour getting these right really.
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
  hide details  
Reply
Clevo P170HM
(6 items)
 
  
CPUGraphicsRAMHard Drive
i7 2760QM HD 6990m Samsung 1333mhz Crucial M4 SSD 
Hard DriveOS
Western Digital Black 500gb Windows 7 64 Bit 
  hide details  
Reply
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