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HELP!! Dual-channel = no boot


EasyCo

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System specs:

MSI K8N NEO2 Platinum

Corsair 1024 3200XL (2x512)

AMD 64 3200+

BFG 6800 GT OC

 

My system wont boot if I put my ram in the dual-channel configuration(DIMM1 & DIMM2). I get a long beep warning, pause, then another long beep... However, if I have them in single channel config (DIMM1 & DIMM3) it works fine.

 

I tried DIMM3 & DIMM4, no luck either. Please help!!!!

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  • Corsair Employees
Please check that you have the latest bios and then test the modules one at a time with http://www.memtest.org to be sure. But if both modules run one up or with both in single channel mode but will not post when in DC mode. That would suggest a problem with the memory controller and I would RMA the CPU.
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Well, yesterday I did something I've never done before...

I brought my system to the shop that I bought the pieces from!

I could do the testing myself but I figure they have spare parts to swap-test with.

 

Suffice to say, when I got there the first tech (Very arrogant, probably because of the amount of not so computer savy people who walk in thinking they know all) took a look and couldn't find the problem. Next thing I know, 3 techs are working on it. 30 mins later, still nothing. However I keep pressing them to try a new CPU but they don't think it's the problem so they keep trying other stuff despite me screaming the RAMGUY SAID SO!!! :)... Finally they ask to keep it for the night... Sure I say! Enjoy.

 

Hehe, I can't wait to pick it up tonight and find out if it was a chipset or CPU problem.

 

On another note, the K8N Neo2 Platinum ddr voltage defaults at 2.5 and the TwinX 3200CL asks for 2.75V, should I raise it to match?

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Yes, just set the timings and such manually.

Dim Voltage to +2.8 Volts:

CAS Latency CL=2.0

Row Cycle Time tRC Bios Default

Row Refresh Cyc Time tRFC Bios Default

Ras# to CAS# delay tRCD 3

Row to Row delay Bios Default

Min Ras# Active Time tRAS 5

Row Precharge Time tRP 2

Write Recovery Time Bios Default

Write to Read delay Bios Default

Read to Write Delay Bios Default

Refresh Period tREF Bios Default

Enable 2T Timing Disabled

Then test the system with http://www.memtest.org and make sure it's stable! If you have problems, I would set Enable 2T Timings to AUTO and test it again!

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Yes, just set the timings and such manually.

Dim Voltage to +2.8 Volts:

CAS Latency CL=2.0

Row Cycle Time tRC Bios Default

Row Refresh Cyc Time tRFC Bios Default

Ras# to CAS# delay tRCD 3

Row to Row delay Bios Default

Min Ras# Active Time tRAS 5

Row Precharge Time tRP 2

Write Recovery Time Bios Default

Write to Read delay Bios Default

Read to Write Delay Bios Default

Refresh Period tREF Bios Default

Enable 2T Timing Disabled

Then test the system with http://www.memtest.org and make sure it's stable! If you have problems, I would set Enable 2T Timings to AUTO and test it again!

 

Wouldn't the Ras# to Cas# delay be 2 and not 3 since the specs are 2-2-2-5?

Also, wha's 2T Timings? What does it do?

 

Cheers

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Actually, it's not running so smooth under 2-2-2-5 @ 2.75v.

 

I freeze in game with it at 2-2-2-5 @ 2.75v but run smooth at 2-3-2-5 @ 2.75v.

 

Any suggestions of why this would occur? It's not like the 1 clock cycle effects my benchmark very much, but I'm still curious.

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