The Official X2 Overclocking Discussion Thread

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06-26-2005, 10:46 AM
jinu117

Got replacement X2 from outpost.com and was able to get 50mhz more (one thing is though, it seems like both core do like voltage vs previous chip. As for stepping... its exactly same stepping still CDBHE 0515RPAW) 2.65ghz @ 1.57v. I think it might be heat related problem on air for limitation I have as well as very hot PWM temp... (up to 64c I saw a t one point -_-) That is my prime 95 stable 3d stable, game stable, memtest stable setting. Memory is running 2t 4x 512mb mushkin blue 2-2-2-5 @ 240mhz 3.25v. Overall, system response time is great, gaming isn't bad at all vs 2.8ghz venice setup I had. Maybe I will get back into some cheap water solution with some left over parts I STILL had and shove it in to see how it fares.
PS) This time, core 1 is better than core 2.... figures. Core 1 actually can seem to go 2.75ghz with about 1.5v while core 2 likes to ramp up with more volt... I need core 1 from this cpu and core 2 from previous one.... that would make this 2.75ghz prime 95 stable machine on air... chuckle...
06-26-2005, 02:06 PM
NickK

I think the extremely hot PWM is a common trait for X2 overclocks due to the increased current draw compare to single core overclocks.
06-26-2005, 02:26 PM
joe2004

In other words it is extremely unlikely there will be overclocks comparable to FX-55. Unless Vapochill comes out with something that can handle more than 200W. Watercooling is the best way to go here, but certainly no low end stuff like my old crappy Exos.
06-26-2005, 05:50 PM
Agent-JCDenton

Hence i'm looking to install a few TEC mods to my Koolance setup
06-26-2005, 09:55 PM
Usurper

i dont think they produce anywhere near 200w tbh.
06-27-2005, 05:27 AM
ewitte

Quote:

Originally Posted by NickK

I think the extremely hot PWM is a common trait for X2 overclocks due to the increased current draw compare to single core overclocks.

My PWM temps are about the same as my 3700+ SD. Although that was running 2.8Ghz @ 1.7v. I've got a 80mm fan right above them but it still hits 53-54C or so during the day when its hot in the house. If I'm not home I'll turn the fan up to max and it stays around 50C. I don't want to hear that thing if I'm home ;)

Eric
06-27-2005, 05:31 AM
ewitte

Core 2 needs extreme voltage to get anything over 2.8Ghz stable while Core 1 probably would have scaled to about 3Ghz. For instance running 2.816Ghz 1.65 or 1.67v core 1 9 hours prime before I cancelled it, core 2 lasted 11 minutes. I'm running 2.805Ghz @ 1.625v and it looks a little better. Did not try core 1 but core2 made it 40 minutes before it had an error. I'm burning it in, checking again and then trying 1.6v.

Eric
06-27-2005, 05:42 AM
xgman

Quote:

Originally Posted by jinu117

Got replacement X2 from outpost.com and was able to get 50mhz more (one thing is though, it seems like both core do like voltage vs previous chip. As for stepping... its exactly same stepping still CDBHE 0515RPAW) 2.65ghz @ 1.57v. I think it might be heat related problem on air for limitation I have as well as very hot PWM temp... (up to 64c I saw a t one point -_-) That is my prime 95 stable 3d stable, game stable, memtest stable setting. Memory is running 2t 4x 512mb mushkin blue 2-2-2-5 @ 240mhz 3.25v. Overall, system response time is great, gaming isn't bad at all vs 2.8ghz venice setup I had. Maybe I will get back into some cheap water solution with some left over parts I STILL had and shove it in to see how it fares.
PS) This time, core 1 is better than core 2.... figures. Core 1 actually can seem to go 2.75ghz with about 1.5v while core 2 likes to ramp up with more volt... I need core 1 from this cpu and core 2 from previous one.... that would make this 2.75ghz prime 95 stable machine on air... chuckle...

I guess it is better to have core 1 be stronger than core 2 if they are going to be different since core 1 will get most of the work right?
06-27-2005, 05:48 AM
xgman

Yeah, I'm finding too much voltage even at reasonable temps starts adversely effecting stability. I wonder why most reposrts are that the two cores are so far off from each other in stability at the same overclock? Really limits the overclocking potential.
06-27-2005, 06:13 AM
Agent-JCDenton

Quote:

Originally Posted by ewitte

My PWM temps are about the same as my 3700+ SD. Although that was running 2.8Ghz @ 1.7v. I've got a 80mm fan right above them but it still hits 53-54C or so during the day when its hot in the house. If I'm not home I'll turn the fan up to max and it stays around 50C. I don't want to hear that thing if I'm home ;)

Eric

are you using TCCDs or UTT/BH5?
06-27-2005, 06:15 AM
ewitte

Quote:

Originally Posted by Agent-JCDenton

are you using TCCDs or UTT/BH5?

TCCD
06-27-2005, 06:53 AM
xgman

Quote:

Originally Posted by Mr.President

hey guys which bios are ypu using for your x2?

was on 623-3 but tried 510-3fixed and got better performance and bandwith for some reason. Not sure what the deal is with the Erata 123 etc. referred to in bios 623 where there is a diable switch that syas better performance but may cause problems. It seems that AMD has released a defective processor. Not sure how to tell how this exhibits itself.
06-27-2005, 09:03 AM
Agent-JCDenton

Quote:

Originally Posted by ewitte

TCCD

50C is quite high for the PWM using TCCDs, tho i managed 48C the other day without cooling and vDimm set to 3.6v. whats your ambient temp?
06-27-2005, 09:25 AM
ewitte

Quote:

Originally Posted by Agent-JCDenton

50C is quite high for the PWM using TCCDs, tho i managed 48C the other day without cooling and vDimm set to 3.6v. whats your ambient temp?

During the day the AC is set to 80F. That specific room can be 85-90F.

Eric
06-27-2005, 09:41 AM
jinu117

Quote:

Originally Posted by Agent-JCDenton

50C is quite high for the PWM using TCCDs, tho i managed 48C the other day without cooling and vDimm set to 3.6v. whats your ambient temp?

1) PWM temp is for the CPU PWM... not VDimm.
2) Setting vdimm high on DFI actually lowers the temp on mosfet for the top right corner as you are dissipating less thrown out power through that circuit vs say 3.4v....
3) Peltier on Koolance.... :stick:
06-27-2005, 09:47 AM
mongoled

Quote:

Originally Posted by ewitte

There is one really nice thing about the X2. While I'm testing stability on CPU2 I don't have to wait for the system to complete. I have prime95 running on it while I'm playing KOTOR2 :D

LOL, damn right, is so annoying tht while stressing a single CPU u cant do too much with the computer, dual chip means tht problem goes bye byes

:D
06-27-2005, 12:14 PM
Agent-JCDenton

Quote:

Originally Posted by jinu117

1) PWM temp is for the CPU PWM... not VDimm.
2) Setting vdimm high on DFI actually lowers the temp on mosfet for the top right corner as you are dissipating less thrown out power through that circuit vs say 3.4v....
3) Peltier on Koolance.... :stick:

When i was burning in my Redlines today i noticed that the PWM temp would increase with vDimm,

vCore -> 1.61v

vDimm:
3.3v -> 43C
3.4v -> varied between 43-44C
3.5v -> a steady 44C
=>3.6 -> 45C

I've gone back to 3.3v for the time being while i sort out cooling in that area (I need to tidy my cables)

And yes, thats TEC on a Koolance.
06-27-2005, 12:19 PM
ewitte

Quote:

Originally Posted by Agent-JCDenton

When i was burning in my Redlines today i noticed that the PWM temp would increase with vDimm,

vCore -> 1.61v

vDimm:
3.3v -> 43C
3.4v -> varied between 43-44C
3.5v -> a steady 44C
=>3.6 -> 45C

I've gone back to 3.3v for the time being while i sort out cooling in that area (I need to tidy my cables)

VDimm @ 2.7
06-27-2005, 12:21 PM
Agent-JCDenton

Quote:

Originally Posted by mongoled

LOL, damn right, is so annoying tht while stressing a single CPU u cant do too much with the computer, dual chip means tht problem goes bye byes

:D

Possibbly run 2 games at the same time if you've got a dual monitor setup? I'm thinking Championship Manager (or Football Manager 2005) & say Operation Flashpoint (Annoying for long waits while searching and connecting to online servers). C Manager doesn't use much of the GPU being mostly text based...i'll out when i try running them 2gether...whenever www.Komplett.com see it fit to ship my X2.
06-27-2005, 12:33 PM
Agent-JCDenton

Quote:

Originally Posted by ewitte

VDimm @ 2.7

Is your chipset >50C? What PSU are you using?
06-27-2005, 01:49 PM
Bandit1

Quote:

Originally Posted by p0tempkin

CCBWE 0517MPMW

same as mine,hehe
06-27-2005, 04:36 PM
ewitte

Quote:

Originally Posted by Agent-JCDenton

Is your chipset >50C? What PSU are you using?

Chipset only gets up to about 46C.
06-27-2005, 04:43 PM
ewitte

After about 24hours burnin on second CPU.

http://s120570057.onlinehome.us/images/x2/9.jpg
06-27-2005, 05:00 PM
johnrr6

Probably stupid questions

How do you engage each core separately so you know what is running what??

Run something like Prime to occupy first core----then run the bench??

When does the 2nd core kick in???

Is it a percentage of CPU use on the first core???

what happens when you multi taks with say 5 apps running at the same time, i.e.: Word, PowerPoint, Phtoshop, Dreamweaver and Outlook???

Is there rhyme and reason as to what core handles what???

Please excuse what may be stupid questions....

I have a 4800+ X2 arriving tomorrow for my DFI rig.

I love the DFI and my 4000+ diego overclocked to 2.8-----and in single apps or a single game it is astonishingly quick....

But multitasking.....

It is a sad 2nd place to a stupid 2.4 cheap Intel Compaq I have at work.

I multi task a lot-----and lag in multitasking drives me bananas....

Am hoping the x2 will solve this as I'd like to stay with AMD....

Here's a pic of my yellow and black themed DFI rig it will go into:

http://www.frontpage2000.family-net....is/Inside1.jpg

John
06-27-2005, 05:08 PM
joe2004

Quote:

Originally Posted by Usurper

i dont think they produce anywhere near 200w tbh.

Oh, I think they do, and go over that. I know that dual Opteron setups spend more than 100W on full load more than single Opteron setups. If this is only 50W increase now then you are looking at the 400-500 MHz overclocked processor that goes to 200W and anything higher more than that.

This will not be tamed by Vapochill, only by solid watercooling, or perhaps modded Vapochill.

Multicore processor overclocking is not for the faint of heart. AMD has done good job of keeping it under the roof at the default frequencies but do not expect that to be the case once overclocked.

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