Please help - stock settings TCCD unstable in dual-channel

[malachii]

Hello,

 

Sorry I'm kind of new to this scene. I am kinda-crossposting because the thread I posted in for my specific memory (Patriot TCCD) is a slow thread, and I'm freaking out.

 

Here's the link there.

 

http://www.dfi-street.com/forum/showthread...7469#post107469

 

Thanks!

 

Mal.

[Krohling]

Well, sometimes settings put in AUTO may work at stock speeds, but some times don't. This mobo requires some tweaking for working correctly.

 

Tell us which are the stock timings for your RAM.

 

Try this guide, might help:

 

http://xtremesystems.org/forums/showthread.php?t=57317

[malachii]

Well, here are my RAM details.

 

I'm in memtest86 now, and it shows 2-3-2-5.1T Dual Channel. I was under the impression that TCCD ram (Patriot XBLK) shows up as 2-2-2-5.1T by default?

 

Default voltage was 2.6, and I have increased to 2.7 for this pass to see what happens.

 

Note: The errors only occur with 2 sticks in dual-channel mode!! When evaluating the sticks individually, there are no errors. This leads me to believe that there is nothing wrong with the RAM itself (I could be wrong!), but that the problem lies in the MOBO, or in its configuration for that RAM.

 

When this pass is complete I'll post the complete settings from the RAM genie screen. Again, these are all "stock" settings.

 

Thanks,

 

Mal.

[dspayre]

could you click "User CP" and edit your signature so that it shows your full list of hardware so that we can better serve you

[mucker]

Take a look here: http://www.dfi-street.com/forum/showthread.php?t=9451

 

Patriot TCCD discussion thread....

 

Don't freak out too bad about timings. Once you learn to tweak, you'll see how good it will fly

 

m

[malachii]

Ok,

 

You should have my signature now. Hope it helps!

 

I still can't believe that using AUTO settings on the motherboard, that my TCCD memory would not pass memtest86?? Seems really strange to me. But I'm coming from more entry-level motherboard in the past. I'm new to the enthusaist crows :-) So far so not-great.

 

I'm not freaking out over the poor default timings - it's about my non-useable system due to unstable RAM when using default settings.

 

RAM timings when rebooting (based on AUTO in the bios):

 

DDR 400, CL 2, 1T, Dual Channel

Tcl 2, Trcd 3, Tras 5, Trp 2 (1T timing)

 

Here are my RAM settings from the genie. I'll go through the guide on xtremesystems next.

 

DRAM voltage : 2.60

DRAM Frequency Set : Auto

Comand Per Clock : Auto

CAS Latency Control : Auto

RAS to CAS delay : Auto

Min RAS active time : AUto

Row precharge time : Auto

Row cycle time : 7 bus clocks

Row refresh cyc time : Auto

Row to row delay : 2 bus clocks

Write recovery time : 2 bus clocks

Write to read delay : auto

Read to write delay : auto

Refresh period : auto

Write cas latency : autio

DRAM bank interleave : enabled

 

DQS sqew control : auto

DQS skew value : 0

DRAM drive strength : auto

DRAM data drive strength : level 4

Max async latency : auto

Read preamble time : auto

IdleCycle limit : 256 cycles

Dynamic counter : disable

R/W queue bias : 16x

Bypass max : 7x

32 Byte Granularity : auto

 

That's it folks! Hopefully somebody here has some ideas for me.

 

Keep in mind I'm stable with 1 stick of RAM, but not 2! Both sticks are stable alone.

 

Thanks,

 

Mal.

[mucker]

Give these a whirl, they are pretty conservative:

 

See if it will boot stable anyway. We are both using TCCD on Brainpower PCB. You should be able to just raise the HTT up with these settings until about 250 without touching anything. You may have to add some voltage to the CPU as you go up. See the settings in my signature, click "here" for more detail...

 

BIOS Settings - 3/10

 

200 HTT x 11 = 2.20 GHz (for my win3500)

LDT x 3

PCIex: 105 ATI (if Nvidia try 100-101)

1:1 memory ratio DDR400

LDT v = 1.3

Chipset v = 1.6

Vddr: 2.8v

Command rate: 1T

Tcl: 2.5

Trcd: 3

Tras: 8

Trp: 3

Trc: 11

Trfc: 14

Trrd: 3

Twr: 3

Twtr: 2

Trtw: 3

Tref: 3072 (200MHz 3.9us)

Twcl: 1

 

Bank int.: Enable

Skew control: 0 (increase)

Drive strength: 7

Data strength: 4

Max. Async: 7ns

Read Preamble: 5ns

Idle Cycle: AUTO (16)

Dyn. Counter: disable

R/W Bypass: 16x

Bypass Max: 7x

32Bit Gran.: Disable

 

m

[malachii]

I noticed that it's always memtest86 test #8 (modulo) that screws up. I've tried at 2.5, 2.6, 2.7 volts - always the same (more or less). Errors and then, it often freezes memtest.

 

Thoughts?

 

Mal.

[rise4310]

what timings do you have now? muckers? if so, most of them worked for me except the bank interleave, max async and the read preamble i put on auto and that fixed the errors.

 

edit---and i save time by running 8 first and then a full test if 8 passes.

[tmogi]

Try Command Per Clock disabled(2T) and other settings all default or auto.

If it works, probably problem is on-die mem con.

You might want to try DRAM bank interleave disabled or setting DRAM drive strength to level7 too.

[Angry_Games]

BIOS Settings - 3/10

 

200 HTT x 11 = 2.20 GHz (for my win3500)

LDT x 3

PCIex: 105 ATI (if Nvidia try 100-101)

1:1 memory ratio DDR400

LDT v = 1.3

Chipset v = 1.6

Vddr: 2.8v

Command rate: 1T

Tcl: 2.5

Trcd: 3

Tras: 8

Trp: 3

Trc: 11

Trfc: 14

Trrd: 3

Twr: 3

Twtr: 2

Trtw: 3

Tref: 3072 (200MHz 3.9us)

Twcl: 1

 

Bank int.: Enable

Skew control: 0 (increase)

Drive strength: 7

Data strength: 4

Max. Async: 7ns

Read Preamble: 5ns

Idle Cycle: AUTO (16)

Dyn. Counter: disable

R/W Bypass: 16x

Bypass Max: 7x

32Bit Gran.: Disable

 

try mucker's settings @ 2.9v and 3.0v (you wont kill the RAM trust me)

 

if that doesn't work, try the 3/16 BIOS from teh BIOS Factory (in the AMD OC section) or the 4/14-2 and see if that gives you any love.

 

also try EVERYTHING in the DRAM section on Auto @ 2.5v-3.0v and see what happens.

 

if you keep getting memtest errors @ #8, then test each stick individually (farthest orange slot from the cpu) and see if you get errors.

 

if you try the 3/16 bios, you can also then use the two yellow slots just to see.

[malachii]

Thanks guys you've all helped a lot. I've performed a TON of tests, and here are my results. Hopefully you can tell me if

 

a) all is good.

B) my venice CPU is poor

c) my venice CPU needs replacing

d) my motherboard is toast

e) my memory needs changing.

 

My overall observation is that I cannot use interleaving. When I do that (the optimized default!) all goes to hell. I tried with 310 bios and 414. Same basic result. With just one stick, I can use interleaving. Also forcing 7 drive was important for me.

 

The question becomes :

 

Does no interleaving mean {correction} MY CPU or MEMORY is bad? And, how "serious" is this lack for performance. Is it as bad as using 2T instead of 1T?

 

Also of interest is my ability to run at 3.0 with better results. In fact I can ALMOST run with interleaving enabled when set to 3.0. (I get a few errors after 5-6 runs). I did not try 3.1. This seems WAY too high for TCCD memory to me, but others report LESS stability at high voltages (I'm getting more stability!). Is this dangerous?

 

Results:

=========

 

[1 stick - same results for both - using mostly auto]

interleaving, 7 drive, [email protected] = 0 errors

interleaving, 7 drive, [email protected] = 0 errors

 

[2 sticks - using mostly auto]

interleaving, 7 drive, [email protected] = 6895 errors

interleaving, 7 drive, [email protected] = 10632 errors

interleaving, 7 drive, [email protected] = a few errors after a long time

(mucker's settings yield almost the same results)

 

[2 sticks - using mostly auto]

NO interleaving, 7 drive, [email protected] = 0 errors

NO interleaving, 7 drive, [email protected] = 0 errors

NO interleaving, 7 drive, [email protected] = 0 errors

(mucker's settings WITHOUT interleaving yield the same results)

(also, using 2-2-2-5 timing yields the same results at DDR400!! yay)

 

Changing to 2T generally gives me 0 errors all the time as well. If either 2T were used, or interleaving removed, then I got 0 errors. I chose to run my tests without interleaving, on the assumption that it would be better performance than 2T. Not really sure though.

 

Here are some quick-and-dirty overclocking results I got... I'm sure I could push farther still. Didn't really try.

 

[2 sticks - using mostly auto - 2-2-2-5 timings]

NO interleaving, 7 drive, 440ddr = 0 errors

 

I suppose if the interleave thing isn't a big deal, then I'm doing ok.

 

Thanks for all the help,

 

Mal.