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-   -   Likely Bad Ram :( (https://forum.corsair.com/forums/showthread.php?t=36785)

Sniper_Merc 03-17-2005 11:32 AM

Likely Bad Ram :(
 
I purchased a pair of Corsair PC 4000 TwinX Pro modules in June of 2004 from Fry's.

At the time I was testing them with an Athlon XP 2600+ (unlocked pre week 43 03) on a Shuttle AN35/N 400 motherboard and could not get them past 215 FSB at any setting with 2.7 Vdimm, even highly relaxed timings did not help so figured it was just a limitation of the board and or chip and set them back to 200 Mhz.

Flash forward to Satuday March 12th with a new system being built on an Epox 9NDA3+ with an Athlon 64 3500+, the board can deliver 2.8 Vdimm but I'm still hitting the identical 215 FSB (HTT) limitation, anything over 215 will error out of Super Pi within seconds no matter the voltage to Vcore or Vdimm or even relaxing the timings beyond 3-4-4-8. Board will not post at anything above 230 Mhz so testing to 250 is impossible.

Just to ensure I wasn't completely insane after 4 days of fiddling with it to get the system beyond 215 MHz, I slipped in a pair of Corsair Value Select 512 MB modules and have been able to get them stable at 227 MHz x11 for 2497 MHz at 2.5-3-4-8, which overall beats the hell out of the PC 4000 modules.

It appears as though the modules were bad or at the very least a bit screwy from the initial purchase back in june of 2004.

Last (semi) stable recorded settings with the PC 4000 modules on the Epox 9NDA3+ is as follows:

Advanced Bios Settings
DRAM Timings

Max Mem Clock: 200 (note that this does not lock it at 200 when CPU Overclock setting is used below)
1T/2T Command Rate: 2T
CAS# 3
RAS# to CAS# Delay 4
Min RAS#: 8
RPT: 4
Fast Writes: Disabled

Power Bios

System Performance: Fastest (optimal didn't help)
CPU Overclock: 215
AGP Overclock: 66
CPU Voltage: +0.05
DIMM Voltage: 2.8
AGP Voltage: 1.7
Chipset Voltage 1.75

Misc Settings:

HTT 4x (setting to 1x provided no help)

Would appreciate any help and or an offical suggestion for RMA on these modules.

Some additional Notes on my testing:

Using Dimm slots 3/4 due to large Zalman cooler blocking the tall heatsinks on the ram, which by chance appears to be better off anyway as noted from postings at Xtreme Systems forums that overclocking in slots 1/2 is a bit flakey on the Epox 9NDA3+.

Memtest86 errors start within 2 minutes at 216 Mhz no matter the settings, at 215 MHz it takes a while but does eventually return errors.
3D Mark 2001 looping infinately will crash within 20 minutes at 216 Mhz, and within 2 hours at 215 MHz
Super Pi errors out within seconds at 216 MHz.

One other thing of note, I'm over in Sunnyvale, CA with the Corsair building being over in Fremont I could bring the modules over for testing :biggrin: .

RAM GUY 03-17-2005 11:37 AM

Can you tell me the test that you are getting errors on, and do you have a Intel based system you can test the modules in?

Sniper_Merc 03-18-2005 12:03 AM

Quote:

Originally Posted by RAM GUY
Can you tell me the test that you are getting errors on, and do you have a Intel based system you can test the modules in?

Memtest86 is whats throwing the errors, as well as 3D Mark 2k1 and Super PI. Below is link to a pic I took of memtest running for 6 hours and 40 minutes, on the Epox 9NDA3+ board. Note that this is at only 220 MHz X11 and the CPU has allready proven it can run higher than 2500 MHz using some Corsair Value Select ram.

Link

And no I don't have an Intel based system to try the ram in, I have however tried it back in the system with the Shuttle AN35/N 400 with similar results.

Edit: ram timings at: 3-4-4-8 2T with 2.8 Vdimm.

RAM GUY 03-18-2005 12:43 PM

The type of errors you are getting would suggest some other problem. Please call our tech support and we can try to help you make sure it's not the modules. 888-222-4346 option 2.

Sniper_Merc 03-18-2005 05:36 PM

Quote:

Originally Posted by RAM GUY
The type of errors you are getting would suggest some other problem. Please call our tech support and we can try to help you make sure it's not the modules. 888-222-4346 option 2.

Just picked up two more sticks of XMS Pro PC 4000 this morning.

Stable at 250x10 2.8Vdimm 2x HTT 3-3-8 memory timings all on auto. Pulling out the new sticks and putting in the old ones results in bios beep and failure to post.

Will give tech support a call on monday thks for the help.

RAM GUY 03-18-2005 06:33 PM

Please follow the link in my signature I think I have a bad part! and we will be happy to replace them or it!

Sniper_Merc 03-18-2005 11:31 PM

Quote:

Originally Posted by RAM GUY
Please follow the link in my signature I think I have a bad part! and we will be happy to replace them or it!

RMA Request sent, thanks RAM GUY :)

Edit:

One other thing. Is there a posibility of just bringing the sticks over to the Corsair building in Fremont? Wouldn't be much trouble for me to drive up there come this monday. Just wondering cause I could really use the replacement sticks right away.

Wired 03-19-2005 01:45 AM

Call Cust Care on Monday about that.

Sniper_Merc 03-22-2005 01:14 PM

Online forum didn't work :sigh!: so sending email with request form attached.

RAM GUY 03-22-2005 02:42 PM

You can also call them at http://www.corsair.com/en-us/company/contact and dial "0" that will take you right to Customer Service.

Sniper_Merc 03-22-2005 04:02 PM

Quote:

Originally Posted by RAM GUY
You can also call them at http://www.corsair.com/en-us/company/contact and dial "0" that will take you right to Customer Service.

Might do that tomorrow if I don't get an email. Thks :)

RAM GUY 03-22-2005 05:27 PM

You should get a reply by about 10: AM tomorrow morning at the latest. I know we had some issue with our system this morning. So they were behind a bit. Sorry for the delay!

Sniper_Merc 03-22-2005 07:19 PM

Quote:

Originally Posted by RAM GUY
You should get a reply by about 10: AM tomorrow morning at the latest. I know we had some issue with our system this morning. So they were behind a bit. Sorry for the delay!

Thks mang :) definately appreciate the update.

RAM GUY 03-22-2005 07:46 PM

Please let me know how you make out!

Sniper_Merc 03-22-2005 09:28 PM

Quote:

Originally Posted by RAM GUY
Please let me know how you make out!

Got the RMA # tonight, will probably overnight the package in the morning. :sunglasse


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