Problem overclocking (prime 95 error)

[vertigofm]

Hey hey hey! I did 2 copies of CPU burn in with error detecting- set the affinity through the task manager and it ran for 5 minutes with 100% on each core with no errors that showed up, im im gonna try another stress test to verify these results

 

[robertk2012]

hopefully you just had something set up wrong with prime.

 

[vertigofm]

Ok I think it might just be a prime problem- after getting sucess with Burn in, I wanted to make sure it was really reporting errors- so I did a quick check- i pumped it up to 260X10 with a core voltage of 1.45, Core 1 quickly had an error, but now im doing it at 240X10 and core 1 and 0 have been ran stable for 3 minutes, which is an improvement- then core 1 failed but its better than prime......

 

[vertigofm]

Well here's another update:

260X9
2:3 divider
10 minute test

No errors on either core...

Is that good? I mean remember when we were doing prime at the lowest divider for a mere 150mhz and it would fail. This is a good sign I believe but im not gonna get my hopes up. I'm gonna try another CPU stress tester, if I clear it with that its safe to assume it was prime. Then I will run it overnight at the current settings just to make sure I have headroom to OC further. I'll get back to you guys tomm and hopefully we can start from scratch using more reliable stress testers

 

[vertigofm]

hmm ok same settings, different program- used cpu stability test and core 1 had a calculation error....

 

[robertk2012]

what program?

 

[vertigofm]

It's called CPU stability test... Now I did these settings with CPU stability test and its stable:

250X9
2:03 divider

But this is a pretty crappy OC huh?

 

[robertk2012]

Better than before though.

 

[robertk2012]

I think you might have just gotten unlucky with that core. Why arent you using a 10x multiplier?

 

[Mogadon]

I'd like to reiterate a point you made earlier vertigo. Have you looked into which BIOS would be best for overclocking with dual core on your board?

 

[robertk2012]

Originally posted by: Mogadon
I'd like to reiterate a point you made earlier vertigo. Have you looked into which BIOS would be best for overclocking with dual core on your board?

Its late. I dont quite understand that statement.

 

[vertigofm]

Ok I asked at the DFI forums about the best BIOS, they said it most likely wasn't an issue. On another note I've been running CPU stability test for the past hour. I changed the divider to 1:1 and used a 10 multiplier X 230, oddly enough changing the divider made it more stable- its been running an hour performing wheatstone calculation tests and mmx tests, and both cores are being 100 percent- so I'm gonna leave it on overnight and make sure that 2300 mhz is stable, this is better news.... So I'm gonna see how it is in the morning, if there are no errors we can assume that:

3-4-4-8 timings, 230X10 at 1.47 V is stable... If its my lucky day and it is stable I can slowly creep up further and further, using a divider if it gets rough. I would still like to know what is wrong with my system and whats going on with prime

 

[vertigofm]

update: stable at 2300mhz with 1:1 divider and 1.45 V.... Its not the memory, any higher than 2300 fails that core 1... I'm thinking of just RMAing it to newegg and getting a new one

 

[Mogadon]

Originally posted by: vertigofm
Ok I asked at the DFI forums about the best BIOS, they said it most likely wasn't an issue.

OK cool. Was just checking that it wasn't an issue. I know with alot of boards the BIOS revision can help you with overclocking, it did with the board I have (not the one in my sig.).

 

[nealh]

the blank statement is always there is no best bios at dfi

the best seem to be either 704-2bta or 623-2,3 bios( I use 623-2)

also I have seen issues with the memory slots

try orange first this seems to work better for most, in my case I started with the yellow slots as OCZ recommended and ever looked backed

so do not RMA yet...I saw someone at Hardforum have huge issues with 0530 TPMW OCing until he switched to the orange slots

Also even though the ram can do 230 plus..the cpu may not be able to do this overclocked

Also, my 170 was kinda weird...I stupidly popped it in and tried to get 2700 with no testing..it was failing left and right

so I lowered my ram and set the vcoreto 1.55(not what I wantred to run at and ran dual prime 95 for like 10hr one night with no crashes

then seeing the speed was possible I lowered down to 1.325 *113%=1.5v...my cpu is very sensitive to ram timings and crap(my old 165 was not)

From others experience...they seem to find the 104%, 110% and 113% seem best..my mobo seems to like 110% and 113%...running a higher vcore and special vid..like 1.4 *104% does not work as well as if I were to set 1.3*110%...not exactly the same but you get my point

The DFI mobo offer so many options it can be a bitch to get things sorted out

I pretty sure the ram does not like alot of vdimm...checke at XS for some timings....

just to test set vcore to 1.5v or 1.55v
10x 250
htt 3x
ldt voltage to 1.3
chipset 1.6v
pcie freq to 105(angrygames recommended this)
turn off cool n quiet
set vdimm to 2.7-2.8v(at least 0.1 or stock)
set ram 100 or 133...3-3-3-10-2t

turn off items you are not using onboard sound, extra nic, serial, parallel ports etc

make sure you are using a clean install, make sure monitor is set to not turn off after certain time(with one set of ATI drivers this was an issue for me and prime 95)

DRAM drive strength and data strength have been a huge issue for many...I have seen..5/1, 7/1,7/3...I used to use 8/2 but now run 6/1 with my 170

Just out of curiosity does the cpu do say 2500 with everything except prime 95?..game etc

Also when I prime 95 now I turn off my AV and spyware and disconnect the internet( i have found with some apps like my dictation software on my laptop I do so much better if this stuff is off)

 

[LiquidImpulse]

simple, your overclock isnt stable,thus detecting errors, bump up voltage for the bazillionth time, and if you are still getting errors, drop down on the OC

 

[Wik]

Originally posted by: vertigofm
update: stable at 2300mhz with 1:1 divider and 1.45 V.... Its not the memory, any higher than 2300 fails that core 1... I'm thinking of just RMAing it to newegg and getting a new one

Does it work out of the box at the rating that it is? If so, then what would be your RMA reason?

 

[vertigofm]

How do I set my RAM to 2T? I don't see any option in the bios for that....

 

[Centoros]

Just disable the command per clock. It should be right under your divider settings.

 

[Centoros]

I had the same problem as you did and had the same error. I had to back off the multiplier until it was rock solid stable. As long as you've got two prime instances running, one for each core, you'll find that sweet spot. Try relaxing the LDT/FSB setting to 3 or 2.5 just to ensure stability and try raising the multiplier again.

Here's a screen shot to show you how I have it set up.

http://photobucket.com/albums/f16/Lumin...Screens/?action=view&current=BIOS1.jpg

Once I found the sweet spot, I cranked the LDT/FSB up to 4

 

[vertigofm]

Yeah, Even if I can't get it past 2.2 I can't complain.... I mean, it's hard to see the bad in my computer with a x1900xtx, but I'll try what u mentioned

 

[Centoros]

Yeah, that's true. The thing is, AMDs don't overclock as well as Intels do as the headroom simply isn't there. On the flipside, what you do get out of the AMDs though, makes them perform that much faster than stock vs. Intel. Make sense? With Intel, you have to really overclock the crap out of them to really get them to perform alot better. AMDs you overclock a little bit and they perform alot better.

Right now, i've got mine mine sitting here @2.5 and its blazing fast, rock solid and stable. Who cares so much about benchmarks. If the machine performs well enough for you, than that's all you need.

I have an Intel 630 prescott machine sitting here currently @3.96Ghz on a DFI 925XT-2 board. Its pretty fast and it still has alot more headroom. I had it up to 4.1Ghz before the RAM simply said, enough is enough. So I know the potential is there.

http://photobucket.com/albums/f16/Luminaris/?action=view&current=PrescottOC3.jpg

 

[vertigofm]

but I read that FSB speed is important and should not be under 1000... So if you have it at 275 a FSB setting to 3 that still doesn't hit 1000

 

[vertigofm]

also disabling command per clock is good?

 

[vertigofm]

On another note- I really dont think its the RAM speed or latency or anything- I think that core 1 just sucks... plain and simple. anything I try is great with core 0 but its that damn core 1 that has trouble