Help me OC 2X1GB PATRIOT DDR500 PDC2G4000ELK UCCC

[rottendumpling]

Have you tried any other DRAM Drive Strength and DRAM Data Drive Strength settings other than 4 and AUTO, respectively? If not, try 7 for the former and 3 for the latter. TREF on AUTO and DQS on AUTO. VDIMM at flat 2.5 for now, UCCC tends to favor lower voltage.

[ReelFiles]

Still playing around with various settings, but for now 2.66v seems less stable than 2.9v. I will follow your suggestions and lower it even more.

 

Does UCCC favor the yellow slots by any chance? They're in the orange ones atm.

[Guest Darien]

Still playing around with various settings, but for now 2.66v seems less stable than 2.9v. I will follow your suggestions and lower it even more.

 

Does UCCC favor the yellow slots by any chance? They're in the orange ones atm.

 

the consensus seems to be orange...

 

one thing I find is that its very particular about the divider... stable settings with one divider will be totally unstable on a different divider... look for settings with a particular divider... ESPECIALLY with tRef... make sure your tRef matches your divider.

[mikepellegrini]

I've got two machines running the Patriot 2X1GB sticks that you've got.

 

I did a bunch of research before I built the machines and from what I found, the best bios for UCCC is the 623-1.

 

Both are perfectly stable at 250 MHz running at CAS 3,4,4,8 1T. I'm using 2.6 vdimm. Other than those above, the rest of the DRAM settings are the stock settings for this bios.

 

I never did find many reviews of the RAM. The best one, the tester got it to run at 255 MHz - but it wasn't a real extensive test.

 

I got the comps to where they're at now in the first day after I built them; I plan to let them sit for another week, burning in, then I'll push them a little more.

 

I've had good luck with Patriot products.

 

The specs:

 

DFI LanParty NF4 SLI DR – 623-1 bios

Opteron 170 – OSA170 DAA6CD CCBBE 0615 EPMW – 275 MHz (10X275) HTT 4 @ 1.35 VCORE - 33c idle; 47c load

2 X 1 GB Patriot PDC2G4000 ELK (3-4-4-8 1T @2.6 VDIMM – on the 9/10 divider - 250 MHz) - orange slots

eVGA 8800 GTS

Thermaltake Venus 12 – AS5 – 3750 RPM

120 GB Seagate 7200 RMP HD

200 GB WD Storage drive

DVD R/W

MSI CD R/W

OCZ GameXStream 700 Watt PSU

Thermaltake Xaser II case with lots of lights and fans

 

Note: It also ran okay at 250 MHz 1:1.

[ReelFiles]

Thanks guys, I got pretty far today with your help.

 

I finally got it running at 250MHz 1T 3-4-8-4 @2.5v with most of the advanced timings on AUTO, I will take a screenie of a64 tweaker when memtest does enough passes, then input the settings manually and retest.

[dr_bowtie]

why wouldn't you want a max async of 9.0...? seems to work for TCCD... is lower tighter...? seems you'd want a looser...

 

and a preamble of 6.5...???

[rottendumpling]

Does UCCC favor the yellow slots by any chance? They're in the orange ones atm.

 

The UCCC's I've used have always behaved better in the orange slots so you should be good there.

[ReelFiles]

So in the orange slots it is then.

 

So like I said earlier, I set most advanced settings on AUTO and memtest finally passed all tests over night.

 

 

 

 

This is what a64 shows with those settings, it's a shame they don't exactly correspond with the bios settings, but I am sure I'll figure it out. Don't let my post count fool you guys, I am pretty much a newbie to OCing. I still have a few links you guys mentioned to look over and CPDMF sent me a link via PMs as well. Since it is Christmas, I'll probably just get a few minutes to play here and there over the next two days.

 

[dr_bowtie]

Reel....

 

with that board and bios (I have the same) I do better with the settings on Auto too...I got mine at 300x10-1:1 with em' on Auto...leave em' there and see what happens... I just loosened up the primaries as need be and then gave it a little juice after that...

 

I still thinking of playing with the TREF...but dont really know how to calculate it...I read the thread but dont understand it....

 

Mine is on 3120 like yours and A64-Tweaker says the same as [email protected] wonder what number would be for the [email protected]? but havent touched it since it works sooo good where it's at...

 

dont know if it will help but here is my screen of A64-tweaker with the auto settings @ 300x10-1:1

 

http://www.dfi-street.com/forum/showpost.p...&postcount=3147

[ReelFiles]

I posted a thread a while ago where I figured out how to calculate Tref, let me go find it.

 

I did set the settings in manually, as far as they correspond anyways. Still testing atm.

[ReelFiles]

I used Sharp's formula with my old RAM here:

http://www.dfi-street.com/forum/showpost.p...53&postcount=31

 

And here's his formula:

 

Hello,

 

Your ram spec should say a refresh interval time, eg 7.8uS or 15.6uS.

The refresh interval is how often the memory cells on the modules are sent a pulse of electricity, this lets it maintain its charge.

 

Now,

200Mhz = 5nano-seconds

250Mhz = 4nano-seconds

300Mhz = 3.3nano-seconds

 

How does one work this out?

 

Using the formula 1 / f = t,

 

1 / 200Mhz = t

Remeber that Mhz =1,000,000

so

1 / 200,000,000 = 0.000000005 (that is 5nano-seconds)

 

But to make things easier just use 1/200 then multiply the answer by 1000.

1 / 200 = 0.005

0.005 x 1000 = 5ns

 

Do that for any frequency and you will be able to calculate the time in nano-seconds.

 

The second part was 1560 clock cycles < these are the options in the BIOS.

So to work out the Refresh interval you just multiply this value with the nano-seconds you just worked out.

 

If you ran your modules at 200Mhz the time in nano seconds would be 5ns

Now 1560 x 5ns =7800 but as 1 nano second = 0.000000001 seconds.

your answer is 7.8uS (micro-seconds).

 

But the bit that needs testing, if you overclock the modules should you try and maintain the default refresh interval?

 

So if the the spec for your modules said 7.8us and you run the memory at 300Mhz what tREF value should you use?

 

If you understand what was said above then it should be

 

t x clock cycles = Refresh rate

 

I have shown you how to work out t

The modules spec states the Refresh rate, eg 7.8uS

 

With 2 knowns you should be able to work out what value to choose in the BIOS

Remember how to rearrange a formula?

 

you should end up with:

Clock cycles = Refresh rate / t

 

So,

assuming the spec stated 7.8micro-seconds

 

Clock cycles = 7.8 / (1/300)

 

= 2340

Then check for the closest value in the BIOS.

Notice that you dont need to multiply anything by 1000.

 

So the final formula would be

Clock cycles = t / (1/f)

 

f = the frequency.

 

Everything I have said is just a theory which does need testing

http://www.dfi-street.com/forum/showpost.p...153&postcount=8

 

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So for my situation this following calculation would apply

 

1 / f = t

 

1 /250 = .004

 

0.004 x 1000 = 4 nanoseconds

 

1560 x 4 = 6240 = ~6.2 microseconds

 

 

Clock cycles = Refresh rate / t

 

Clock cycles = 6.2 / (1/250) = ~1550

 

So now I am retesting with Tref at 1552, the closest match.

 

Found this on another post I made on Corsair's support forum, doesn't anyone have a completed version of this list?

 

1552= 100mhz(?.?us)

2064= 133mhz(?.?us)

2592= 166mhz(?.?us)

3120= 200mhz(?.?us)(seems to be a/ Bh-5,6 sweet spot at 250+mhz)

---------------------

3632= 100mhz(?.?us)

4128= 133mhz(?.?us)

4672= 166mhz(?.?us)

0064= 200mhz(?.?us)

---------------------

0776= 100mhz(?.?us)

1032= 133mhz(?.?us)

1296= 166mhz(?.?us)

1560= 200mhz(?.?us)

---------------------

1816= 100mhz(?.?us)

2064= 133mhz(?.?us)

2336= 166mhz(?.?us)

0032= 200mhz(?.?us)

---------------------

0388= 100mhz(15.6us)

0516= 133mhz(15.6us)

0648= 166mhz(15.6us)

0780= 200mhz(15.6us)

---------------------

0908= 100mhz(7.8us)

1032= 133mhz(7.8us)

1168= 166mhz(7.8us)

0016= 200mhz(7.8us)

---------------------

1536= 100mhz(3.9us)

2048= 133mhz(3.9us)

2560= 166mhz(3.9us)

3072= 200mhz(3.9us)

---------------------

3684= 100mhz(1.95us)

4196= 133mhz(1.95us)

4708= 166mhz(1.95us)

0128= 200mhz(1.95us)

[dr_bowtie]

In this formula....

 

clock cycles = 7.8 / (1/300) = 2340

 

In windows calculator I get = 2600?

 

now our ram is 15.6...so doing the same math...

 

15.6 / (1/300) = 5200...is that right...doesnt sound right...?