is this 2 much voltage for 2.6ghz OC?

[edub2006]

hey guys quick question. im OCing my opteron 165 to 2.6ghz...its stable @ 1.5v . temps dont get passed 49c on load...is this 2 much voltage on my cpu? should i oc to 2.5 with lower voltage? or will it be just fine?

 

[aigomorla]

1.5 isnt too much. Im pushing close to 1.5 right now. If your system will be stable at 2.5ghz 1.37V stock voltage it might be better. A 100mhz jump isnt worth the .13 extra voltage if you ask me.

 

[Ricemarine]

Ehh, the safe zone is 1.45v, so I'd stick with that so I don't burn my CPU...

By the way, I am at 2520 MHz right now stock core, or actually 1.33v. With my opty.

 

[aigomorla]

ehhh?? 1.45V?? ive seen tons of people run X2's with at least 1.5 :X Some X2's wont get past the 2.5ghz mark unless you bump up to 1.5V. Can you show me a article where it says 1.45 is the safe zone? to my knowledge, i thought 1.6V was danger and 1.5 was borderline.

 

[Ricemarine]

Originally posted by: aigomorla
ehhh?? 1.45V?? ive seen tons of people run X2's with at least 1.5 :X Some X2's wont get past the 2.5ghz mark unless you bump up to 1.5V. Can you show me a article where it says 1.45 is the safe zone? to my knowledge, i thought 1.6V was danger and 1.5 was borderline.

Meh, it's all a matter of opinion. But usually, those who can usually reach 2.7 GHz dont' need more than 1.45v. Some might need 1.5v, it's all the luck of the draw I suppose. 1.53v is the overvolt line for me. X2's overclock differently than opteron's, even though mainly opterons have the toledo core.

 

[edub2006]

yea..ur right 100 mhz isnt worth the volts...i wish i could run 2.5 on stock vcore but for some reason wont let me run 2.5 with lower than 1.45. i think its my memory(pc3200 ocz plat)

 

[Ricemarine]

Originally posted by: edub2006
yea..ur right 100 mhz isnt worth the volts...i wish i could run 2.5 on stock vcore but for some reason wont let me run 2.5 with lower than 1.45. i think its my memory(pc3200 ocz plat)

Then run your memory with a divider... But I really doubt your ram has to do anything with the vcore. Btw what stepping is your opteron 165?

 

[aigomorla]

Originally posted by: Ricemarine

Originally posted by: edub2006
yea..ur right 100 mhz isnt worth the volts...i wish i could run 2.5 on stock vcore but for some reason wont let me run 2.5 with lower than 1.45. i think its my memory(pc3200 ocz plat)

Then run your memory with a divider... But I really doubt your ram has to do anything with the vcore. Btw what stepping is your opteron 165?

at 9x multiplier your gonna have to use a stepping try to use a lower mem stepping. like 5:6. Also, what board do you have? i have the same exact RAM as you do and if u have a DFI class board, then i might be able to help u out a bit more. Also if it is DFI, try changing the memory to slots 2,4 and not 1,3. It was reported on DFIStreet, that the board overclocks better on 2,4 and 1,3 :\

Lastly, if your board is also a DFI, did u connect all the aux power imputs? the board takes 2 additional power imputs besides the standard ATX2.0 . Having this imputs connected increases the stability of the system.

Oh also, whats the voltage your running on your platinums? right now i have mine at 2.8 +.03V .

 

[Ricemarine]

Originally posted by: aigomorla

Originally posted by: Ricemarine

Originally posted by: edub2006
yea..ur right 100 mhz isnt worth the volts...i wish i could run 2.5 on stock vcore but for some reason wont let me run 2.5 with lower than 1.45. i think its my memory(pc3200 ocz plat)

Then run your memory with a divider... But I really doubt your ram has to do anything with the vcore. Btw what stepping is your opteron 165?

at 9x multiplier your gonna have to use a stepping try to use a lower mem stepping. like 5:6.

When I implied stepping, I meant like CBB1E 0550 VPMW that's on your cpu. Mem stepping for you = memory divider.

 

[edub2006]

i have an asus sli prem 0550 uvpm something like that.. i forgot..i did however see an extra plug on the mobo..it looks like a regular 4 in plug labeled ez plug( like the one u woukld plug 2 a cd drive)
right now im running 1:1 divider...stable

 

[aigomorla]

that might be a aux power plug, i would read the manual to see exactly what that plug is, if it says u should connect it for stability, it is highly recomended to plug a power cable to it.

 

[edub2006]

i read it and it says its to make the sytem stable when using 2 video cards...should i go ahead and plug it anyways?

 

[5t3v0]

1.5v is fine. 1.45v is over cautious unless you intend to keep you cpu for its full lifetime, often quoted as 10 years. That would be like me still having my Pentium II 333 today. I use 1.55v to get 2.5GHz on my 144 which is fairly high (but still only 11% above default) but then if I haven't upgraded this cpu in a year's time I'd be surprised. I would agree with aigomorla & say that 1.6v & over is too high but there's no strong evidence for that either. It all comes down to personal preference with what you feel comfortable with & how long you intend to keep your cpu.

Ram has no effect on the cpu overclock & vcore in my experience. I went from 1Gb to 2Gb ram & my overclock & vcore stayed exactly the same. Motherboard & psu are the biggest factors.

I'm surprised that you could even start the pc without that 4 pin power plug connected. Mine wouldnt.

 

[edub2006]

basicly the connector on board looks like the female part of this

pic

 

[Matt2]

Originally posted by: edub2006
basicly the connector on board looks like the female part of this

pic

yes plug it in.

make sure the extra floppy connector is in as well

 

[VERTIGGO]

I dual primed stable overnight at 2700MHz (250MHz ram * 200:166 = 300MHz HTT) with 1.44Vcore. Max load temp has been 44C. I'll be going higher tonight...

 

[edub2006]

hey vert ..i saw your 3dmark06 core at what ghz were u running that? i got a 4448 at 2.5ghz . I can OC to 2.6( havent tried 2.7..im scared) but that takes 1.49-1.57(max temp 49c) which by what i have read here its to much v core. Im happy at 2.5ghz. also at 2.6gz i cant get prime 95 stable. one core goes all day but the oter fails after like 2minutes. giving me an error saying "0.4 expecting 0.5" something like that. also when i do 3dmark06 i can see some artifacts during the snow test. I have tried putting the mem divider low but it only runs the mem at like 140-180ghz( i think thats slow..right?) right now its running at 226mhz (1:1) i really dont know if that improves performance or not. Im gonna try to plug in that EZ plug and c. i dont know why its taking so much voltage for me to run at 2.6 (1.45) is this normal? i have seen on the forum of peeps running 2.6 on stoc v core.

another question about cpu...is it the voltage o heat that kills the cpu?. I only plan to have my cpu for 2 years at the most.

 

[tvdang7]

1.55 right here on 3200 venice. temps are low 50 ish

 

[furballi]

1.55Vcore is fine with the 90 nm core, and 1.65Vcore with the older 130 nm core. Your CPU does not need to run at full speed all the time. Installing Cool and Quiet will allow the CPU to throttle down to a lower CPU multiplier (like 5x) and lower Vcore (around 1.2V). This will permit long CPU life and fast performance when needed.

 

[edub2006]

 

[nealh]

Originally posted by: edub2006
cool and quiet? does that work? i had it on my old asus board and the cpu fan would stop sppining at times ..so i was like screw that im not putting that on my new board..ill check it out

Do not use cool n quiet with overclocking this leads to issues

on the dual core chips most will use 1.55v max on high end air, higher if water or phase change cooling

I prefer to stay around 1.5v...there have been no reported issues that plaqued Northwoods with xs vcore on the A64, Opteron, X2 chips

1.45v is only the max if that is right for you..any increased vcore over stock has some risk...10% or less increase should do little to lifespan of the chip..15% should be safe but will likely lead to some reduced lifespan

max I use with air cooling is 15%...1.55v

you just need to decide what is ok with you...nobody really knows..but the engineers will tell, if you increase the vcore you will reduce the lifespan
increased vcore and increased temps is a double whammy....
even low vcore and high temps is not good

Always rememberOCing is YMMV and at your own risk

 

[edub2006]

so high volts is ok ( at my own risk)as long as temps are low..sounds good to me.

now for the memory ..if i can run it stable at 1:1 should i? does it make it big diffrence in performace if i go for a lower divider but higher pc speeds. 226mhz(2.5ghz) vs 180mhz(2.6)?

 

[furballi]

All my builds are overclocked with C n Q. No issue to report. Those with problems are running the system too close to failure. I always find the failure point and then back-off 40 to 50MHz core speed.

Many experienced overclockers also rely on C n Q to achieve higher top-end performance with mininal reduction in CPU life. Of course there are boards with poorly implemented chipset that will not run stable when presented with a large fluctuation in CPU speed and Vcore.

My el-cheapo $45 ECS NF3 board has no problem pushing a 3100 Sempron Paris up to 2.51MHz at 1.6Vcore with 2.5-3-3-5-1T timing (Corsair Value Select @ 232MHz). Most of the time, the CPU is crusing at 1.39GHz with 1.2Vcore.

If I use Firefox to open more than ten windows AT THE SAME TIME (Open In Tabs), then the CPU load may spike to 100% for about 4 seconds. Again, C n Q will dynamically adjust the core speed to match the current load.

Going from 200 to 166 memory divider will cost you about 50 MHz core speed. So you will get a little boost in speed with the lower memory divider.

 

[shinzwei]

Whats C and Q?

 

[edub2006]

asus cool and quiet