Bad VX memory or more burn-in?

[BadImplant]

Hi All,

 

I've got a set of OCZ 3200 Gold VX modules I have been trying to overclock to 250Mhz. I'd like to OC my SD to ~2.5 Ghz to keep it cool with the stock HSF until I get something better. Lax timings, more volts and lots of active cooling dont seem to help, and I'm still getting errors in memtest 1.55 at 220Mhz and 3.2V with 2-2-2 timings. I'm able to run at 230 with timings of 2-3-3-8 and 3.2V. I'd like to get closer to 250 with 2-2-2 timings. I've been running memtest for 8+ hr/day at 240, 2.5-3-3-8 and 3.2-3.5V for a week without getting any reduction in errors. Here are my bios settings, any recommendations would be appreciated.

 

Genie Bios

 

FSB 240

LDT/FSB 3x

CPU Vid 1.275

CPU Vid Special 123%

LDT 1.20V

Chipset 1.60V

DRAM 3.5V

 

DRAM Config

200

enable

2.5

3

8

3

7

10

2

2

1

2

3120 or 4708

auto

enabled

auto

0

8 (drive strength)(1 seems to reduce errors to ~150/pass in test #5)

1

auto

auto

128

disable

16x

7x

disable (4)

[thecoomar]

are you using 623-2?

[BadImplant]

It's 623-3, direct from DFI Official BIOS page.

[loc.o]

Mine are stable at 250 2-2-2-5 but need ast least 3,43v to do so. I give them 3,5v with bios 510-2fix (23-06-05) and i use the orange slots.

 

Your 3,5 should be more then enough. Running them for a few more days may do.

[Markus_d]

burn them in @ 2-2-2-X and 3.6v for 12h.

 

run as high speed you can get without getting thousends of error, a few errors is OK....

 

hopefully you will get rid of the errors totally, and then you just increase the speed some more until you get som errors again, and burn them in 12h again....

 

when errors gone after 12h (hopefully) you just increase the speed again, and do this procedure until you cant go any higher....

 

//Markus

[thecoomar]

you should try a bios that ends with -2

[BadImplant]

Thanks for the advice guys, I guess Ill keep burning them in for a while and report back.

[red930]

Uwackme BH-5 Burn-in Guide

 

Set memory voltage to 3.3V

Set FSB to something high but not too high, e.g. 230 FSB

Run memtest86 and loop "test 5" for a few hours

 

If you get no errors at your this speed, increase FSB, all the way until you start getting errors. When you do, continue to loop "test 5" for hours, the errors will decrease or will be less frequent, soon enough they will magically disappear all together. When this happens, increase the FSB and try again.

 

On the errors... a few is ok, but not a bazzillion. You want the ram getting the crap kicked out of it, and too many errors, the program goes into subroutines to log them instead of hammering the ram. So a "few errors"...10-20-50-100 is ok, not not K's. I liked 10-20 max PER LOOP of the test. The thing is, when errors are found it takes a break to record the tally.... which takes time away from HAMMERING the ram.

 

Yes the idea of keeping the error rate low is that the program will take time away from hammering the ram to "tally" the error, and the idea is to hit the ram as hard as possible, so try to target the FSB at the point where errors start but not so high that ALOT of errors occur (as this would take away from the overall effect we are trying to acheive...HAMMER the SNOT out of the ram).

 

 

 

For burn in its not required to set it to the highest voltage possible. Instead, and this is confirmed by OCZ, set the Vdimm to 3.2-3.3V and run it in memtest at as high an FSB as it will run without getting more than a few errors on a pass. Now at that FSB point, give it 24-72 HOURS of burnin, keeping the ram cooled with a fan blowing on it. Hopefully the ram will "improve" over time and the errors will reduce/disappear. Try increasing the FSB a couple Mhz every say 4-6 hours, and continue burning.

[steelballzz]

yes

with me it worked fine

the mushkin special needed 3,3 v to reach 235....now i only need 3,1 to get the same 235

 

 

and it gets better.....248 3,3v...i could only do 240 just a few days ago

 

 

burn in rullezz....i guess