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RMA request for twinx xms PC4400C2.5


raptor.dst

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hello,

 

I have twinx xms PC4400C2.5 ram (2X512mb)

but i can't boot at 275 Mhz 2.5-4-4-8 or other timing

I can't boot if the memory is above 250Mhz :eek:

 

I have a DFI nforce4 ultra-D with bios 702-3, and an A64 3700+ (san diego)

I tried with a lot of differents bios, and in the yeallow and orange memory slots

 

thanks

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My CPU is stable at 280*11=3080 Mhz

And My MB is stable with fsb>350

 

I can't boot if the memory is above 250mhz, and i have to put bad timing to boot

for example, now, my memory is at 228Mhz 3-4-4-8

if I put a little more than 228Mhz (230Mhz for example), My PC boot, but windows restart during the load :(

 

Moreover I can lower the multiplier of my CPU ;)

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  • Corsair Employees
The option will show in the bios but the multiplier is not actually changing! But I would test the modules one at a time and if the modules will not run at above 230 MHz how are you running the CPU at 280 MHz? If you are setting the memory frequency at like DDR266 to run the CPU that way then that is not a good example. The CPU Frequency will be able to run much higher if you are under clocking the memory. That is the way this platform works. But to be sure its not a module holding you back I would test them one at a time.
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It's that I said, I have to underclock the memory, because it doesn't works 275Mhz 2.5-4-4-8, whereas it's the normal timing for this modules

I tested with others motherboards : ASUS A8N-E and MSI k8N-E platinum

 

The memory didn't work at 275Mhz with these motherboards ... :mad:

 

So to overclock my CPU, I have to put DDR166 :(

If I don't oveclock my CPU, and I put DDR266, it doesn't work :(:

 

Do you understand what I say ? Because I don't speak english very well, sorry ...

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hi,

 

I did the tests,

So if I put one module I can boot at 275 2.5-3-3-8, and it's stable

 

But if I put 2 modules in dual channels, I can't boot above 270Mhz

So I boot at 265Mhz at 3-5-4-8, but I have blue screen during games ...

 

I don't understand what happen .... :(:

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hi,

 

I did the tests,

So if I put one module I can boot at 275 2.5-3-3-8, and it's stable

 

But if I put 2 modules in dual channels, I can't boot above 270Mhz

So I boot at 265Mhz at 3-5-4-8, but I have blue screen during games ...

 

I don't understand what happen .... :(:

 

 

Hi Raptor,

 

I also own a DFI nF4 Ultra-D with the same banks as yours ... ans i also wants to make an RMA request.

 

I tried for hours (ouch for days, for weeks) to make these banks works with the DFI.

Then, i belevied i found working settings with these config :

- Proc : AMD 3200+ OC to 2600 (rock tsable with others banks --- even nomane one)

- Ram : synchro at 260 MHz (520 DDR) ... vdimm to 2.7 or 2.8V ... default timings (2.5-4-4-8)

 

This system worked for me during several months, but now ... it's impossible make this system works ... crashes, crashes ...

 

I tried several combinations :

- RAM desynchronised (180, 166, ....) ---> never works.

- return to standard processor speed with synchronised RAM (DDR 400) --> never works !

 

For information, Memtest+ or Windows memory test won't report any errors.

But, if a try :

- Windows version of Memtest

- SuperPI, Prime95, OCCT ....

--> i ALWAYS have errors.

--> that's why my PC always crashes.

 

Then, i replace the corsair Banks with no-name ones (desynchronised) and my PC doesn't crash anymore, even at 2600 Mhz (rock stable SuperPI, Prime95, in games, in windows ...)

 

So, i think that my CORSAIR Banks, maybe yours, are faulty.

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  • Corsair Employees

Nada,

If the modules will run one up at 275 Mhz then chances are its not the memory. But you can try the settings bellow for reference and see if they help.

 

Raptor,

Please try these settings and test the modules one at a time with http://www.memtest.org.

And if either one of you does not have an unlocked CPU I doubt you will get much over 240 Mhz,

 

Please make sure you have the latest BIOS installed for your MB (download the Beta version) and load optimized defaults settings, and try the following BIOS settings;

Genie BIOS/DRAM Configuration

DRAM Frequency Set: 2:1 or 400MHz or 200 (if option are 133/166/200)

Command per Clock: Auto

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 8T

And leave the rest at AUTO setting

Genie BIOS

FSB BUS Frequency: 275

LDT/FSB Frequency ratio: 3X

LDT Bus Transfer Width: 16 16

CPU/FSB Frequency ratio: Auto

CPU Multiplier: 8-9X

PCI Ex: 100

K8 cool N’ quiet: Disable

CPU VID Start Up Value: 1.55 (Depends on Core of CPU but about .5 Volts above default)

CPU VID Control: 1.55 (Depends on Core of CPU but about .5 Volts above default)

CPU VID Special Control: Auto

Chipset Voltage Control: 1.6

DRAM Voltage Control: 2.8

All other settings are motherboards defaults

Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure!

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I did that.

 

I had no errors, but next I had blue screen during games ... :(:

 

And today, I had another problem

my ram is at 230Mhz 2.5-4-4-8, my cpu wasn't overcolcked

and I had a blue screen (It's memory error isn't it ?) after 2 hours playing a game (LOMAC) :eek:

(I was in dual channel)

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Thanks RamGuy for the response.

 

First, i made a RMA request (always waiting for the response) regarding to a first response telling me that i should do that : Case # 208192.

 

Then, about the memory speeds my typical config was this one :

 

Genie BIOS

FSB BUS Frequency: 260 (AMD 3200+ overclocked to 2600Mhz stable with an SQP 512 Mo Ram Bank ...)

LDT/FSB Frequency ratio: 3X

LDT Bus Transfer Width: 16 16

CPU/FSB Frequency ratio: 10x

PCI Ex: 100

K8 cool N’ quiet: Disable

CPU VID Start Up Value: 1.5

CPU VID Control: 1.5

CPU VID Special Control: Above Vid x 104%

Chipset Voltage Control: 1.6

DRAM Voltage Control: 2.8 (I also tried 2.9 as MotherBoard Monitor seems to report a smaller value than the one in Bios)

 

Genie BIOS/DRAM Configuration

DRAM Frequency Set: 200 RAM/FSB:01/01 (RAM synchronised)

Command per Clock: Auto (1T is report)

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 8T

...the rest at AUTO setting

--> tried by leting them to AUTO (DFI default) and also tried by manually setting them to "Auto" ...

 

Then i use these settings with several DFI Bios. Now, i use the last 406 official bios.

With these settings, the PC worked fine during several months. But now, since 2 or 3 weeks (just after the reseller 1 year waranty :sigh!: ), it doesn't work anymore :

- Memtest with each bank or with dual channel --> no error

- Windows Memory Test --> no error

- Windows version of Memtest --> several errors

- SuperPI, Prime95 or OOCT (and so on) --> errors

- .. and the PC crashes in Windows (during startup, during work, or game, ...)

 

So,

I used the banks with a bios config during x months, but now, with the same config, it's impossible to make it stable.

 

So, I tried several other config :

- Ram desynchronised at 180, 166 ... nothing worked

- Processor a default speed (2000MHz) with RAM synchronised (DDR 400) ... it didn't work.

 

So, i can say that i've always used the settings described in "Genie BIOS/DRAM Configuration":

- the RAM has never been overcloked (DDR 520 max speed used with my config)

- the RAM won't be OK even at a lower speed, with several different DFI Bios

- ... but when i use another type of RAM bank (tested with an SQP 512Mo bank), the PC works fine ... even with my 3200+ OC to 2600 Mhz. I made a 10 hours stress test with Prime95 yesterday with the SQP bank and all is fine (SuperPi, Games, Windows ....).

 

So, it really seems that the Corsair Banks are faulty ... or one of them...

The real problem is that the Memtest test doesn't report any error ... but the PC always crash ... and SuperPi, Prime95 ... do report errors.

 

So, the RMA process seems to be justified ...

 

PS :

Before thinking to faulty RAM, i made, since several weeks, a lots of tests with a lots of DFI bios, with a lot of processor speeds (2000, 2200, 2400, 2600) .... and a lots of Vcore/vdimm combinations ...

I also tried the bios setting "DRAM response time" to different values "Fast", "Normal", "Slow (??)" with no more success.

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  • Corsair Employees
Let's get them or it replaced. Please follow the link in my signature “I think I have a bad part! Or *New* Tech Support Express” and we will be happy to replace them or it, please note that you are posting from the forum!
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thanks,

 

but do you understand why my memory work if I put one module, and doesn't work if I put the two modules ?? (in dual or single channel)

 

I did the tests with an A64 3000+, and an A64 3700+ for CPU

and an ASUS A8N-E, a MSI k8N neo4 platinum, and a DFI nforce4 ultra D

 

I have always the same problem with all of these... :sigh!:

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I think that memtest isn't a good test

because I have no errors at 270 2.5-4-4-8 (if I launch memtest with the bios)

but I can't boot

 

I have this problem with different CPU and motherboard

So if I change everything, except the RAM, and I can't boot, the RAM isn't good :roll:

 

 

Moreover I have no errors with superPI 32M

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