My ram is a bit unstable, at overclocking

[imported_K3N]

While testing the stability of my oc (venice 3000 cpu at 9x268 at 1.51V) , and after 8 loops, i get a message box stating "Not Exact in Round".

And then ran memtest, and i didnt get any error at up to 70%, and a 2M super pi calculation. It's at 9x260 , htt is at 3x, 2.5-3-3-8, and 2.7v settings

When i upped the fsb to 268, i got an error at 14%. when i upped my ram's volts from 2.7 to 2.75, i got an error at around 20-30%..

So what do you recommend i do? Will rasing tCL from 2.5 to 3 and/or will increasing tRAS from 8 - 10, help?

By the way, my ram is TCCD right? I bought the ram on two separate occasions. One stick is like this, http://www.newegg.com/Product/Product.asp?Item=N82E16820220033R , the other is like this, http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=83704

 

[themusgrat]

Put the voltage at 2.9, and see if that helps. 2.9 is safe with almost all modern RAM. Leave tras at 8, and if the extra volts don't work, do latencies at 3-3-3-8. Also try 2.5-4-3-8.

 

[Wentelteefje]

Lower multiplier to 8x and HTT to 3x, up your CPU to 300MHz and set a 3:2 RAM divider... Use the extra voltage to force 1T command rate and lower the timings...

 

[RBauer]

Patriot memory there is the issue.. Great memory for a stock system but when it comes to an o/c its not the best.

 

[imported_K3N]

Originally posted by: Wentelteefje
Lower multiplier to 8x and HTT to 3x, up your CPU to 300MHz and set a 3:2 RAM divider... Use the extra voltage to force 1T command rate and lower the timings...

are you serious, i heard 1T can cause some instability problems. Can anyone else confirm if this solution is ok?

 

[Wentelteefje]

If you use the 3:2 divider, your RAM will be running at 200MHz (default ) and your CPU at 300MHz... At those stock speeds, you can't do anything wrong with forcing 1T, it'll be faster than a "high" overclock on 2T... BTW your RAM appears to be specified for 2-2-2-5 timings...

EDIT: Your RAM can surely handle it...

 

[imported_K3N]

Alright i'll try that, thanks Wentelteefje , . I'll report back and see how things go.

 

[Wentelteefje]

Hmm, with the MSI, you can't select 1T I'm afraid... Then just lower the timings...

 

[imported_K3N]

Alright , by the way, im really trying to get atleast 2.5ghz on my cpu overclock, is it alright if i do 280x9, with lowered multiplier to 8x and HTT to 3x, and a 3:2 RAM divider.. ?

BTW Thanks for your inputs.

 

[Wentelteefje]

Your RAM will not hit its full speed (186.666 MHz), but that way, you can lower the timings as well... It shouldn't matter much (if at all)... BTW 2.7GHz should be possible... I had mine up to that speed...

EDIT:

Originally posted by: K3N
Alright , by the way, im really trying to get atleast 2.5ghz on my cpu overclock, is it alright if i do 280x9, with lowered multiplier to 8x and HTT to 3x, and a 3:2 RAM divider.. ?

BTW Thanks for your inputs.

 

[imported_K3N]

i just checked in my bios , and it doesnt have an option to reduce the divider to 3:2 .
It has an option for HTT width, will that solve anything? Also will reducing the Ram's mhz from 200 to 166 do any good ? Im really disappointed that this motherboard doesnt have an option for a a cpu divider...

 

[Wentelteefje]

Heh, don't be disappointed, 'cause it has... When setting a RAM divider of 3:2, you have to lower the RAM speed to 133MHz (200/3*2)...

Stay off the HTT width!

 

[stevty2889]

Originally posted by: K3N
i just checked in my bios , and it doesnt have an option to reduce the divider to 3:2 .
It has an option for HTT width, will that solve anything? Also will reducing the Ram's mhz from 200 to 166 do any good ? Im really disappointed that this motherboard doesnt have an option for a a cpu divider...

3:2 divider is the same as lowering your ram to 166, so thats what you want to do.

 

[imported_K3N]

Oh alright, i'm so relieved. I'll go right ahead and do that. thanks

 

[Wentelteefje]

1. Lower HTT to 3x

2. Set RAM divider of 3:2 (133MHz)

3. Leave multiplier at 9x

4. Raise your CPU Frequency till you reach about 280MHz (2.52GHz), you could try 2.7GHz as well... Take steps of 5MHz a time...

5. If your system becomes unstable, don't start raising your VCore like mad, but raise the chipset voltage a bit as well... In theory you shouldn't be touching your memory voltage, as it runs below stock speeds...
6. When you have reached the speed you want with your CPU, lower your memory timings... 2-2-2-5 should work, since it's specified that way...
7. Test stability with Prime95 or OCCT... Preferably the latter...

Good luck with it! I'm off to bed... If you have problems, don't randomly start raising the voltages...

 

[Wentelteefje]

Originally posted by: stevty2889

Originally posted by: K3N
i just checked in my bios , and it doesnt have an option to reduce the divider to 3:2 .
It has an option for HTT width, will that solve anything? Also will reducing the Ram's mhz from 200 to 166 do any good ? Im really disappointed that this motherboard doesnt have an option for a a cpu divider...

3:2 divider is the same as lowering your ram to 166, so thats what you want to do.

Nope, that's 6:5... 3:2 is 133MHz...

 

[imported_K3N]

Alright i set it to 133mhz, and fsb to 270x9. At first when i got into windows, i got a blue screen immediately, and my computer restarted instantly. I then increased my cpu voltage to 1.51v, and i did a memtest of up to 30% and it passed. As i am typing this message , things seem to be fine. I just did a super_pi 2M test and everything seems alright.

I still have the ram timings at 2.5-3-3-8. Do you recommend that i reduce it, if so , what would you recommend?

picture

http://img58.imageshack.us/img58/4185/cpu01213cq.jpg

BTW Thanks for your help.

 

[Wentelteefje]

If you're going to leave it at this speed, a better situation would be to pick 8x300 IMO... Your RAM will "feel" better, and therefore you might not even notice a difference in performance... BTW I reached 2.4GHz @ 1.44V on a MSI K8N Neo4 Platinum (its bigger brother )

The RAM you have should at least be able to run at the timings it's specified! In this case 2-2-2-5...

Yay! 900

EDIT: BTW, 8x304 will give you the same speed...

 

[imported_K3N]

alright, so the closer the ram is to 200mhz (if the mhz is set < default) 200, it will perform much better? I changed the setting to 304x8 (Ram is at 202.7 mhz), and everything seems to be working great. Thanks .I'll try to aim to atleast 2.5ghz, and then give my cpu a rest.


Would 8x315 be better and 9x280 ?

 

[stevty2889]

Originally posted by: Wentelteefje

Originally posted by: stevty2889

Originally posted by: K3N
i just checked in my bios , and it doesnt have an option to reduce the divider to 3:2 .
It has an option for HTT width, will that solve anything? Also will reducing the Ram's mhz from 200 to 166 do any good ? Im really disappointed that this motherboard doesnt have an option for a a cpu divider...

3:2 divider is the same as lowering your ram to 166, so thats what you want to do.

Nope, that's 6:5... 3:2 is 133MHz...

oops, you are correct of course

 

[Wentelteefje]

Originally posted by: K3N
alright, so the closer the ram is to 200mhz (if the mhz is set < default) 200, it will perform much better? I changed the setting to 304x8 (Ram is at 202.7 mhz), and everything seems to be working great. Thanks .I'll try to aim to atleast 2.5ghz, and then give my cpu a rest.


Would 8x315 be better and 9x280 ?

Glad it worked out... Yeah, 8x315 (313MHz would already suffice for 2.5GHz) is IMO better, as it will give you more memory bandwidth (your RAM should be running at 210MHz, which is a speed even value RAM can handle)...

When you have set your speed, then try lowering those timings eh... They are way too high, looking at what you've paid for... If 1T cannot be forced (this is the case unfortunately), try lowering your timings (a cas latency of 2 should be perfectly possible, and the rest as well, a small voltage adjustment could be needed)...

 

[imported_K3N]

Alright thanks for your inputs guys, especially Wentelteefje

 

[Wentelteefje]

Yes! np mate... Have fun with it

 

[imported_K3N]

I was really trying to break the 2.6ghz benchmark, but when i did, i got random freeze/reboots, when running 3dmark 05, the cpu volts were at 1.62V. I also lowered the ram timings to 2.5-3-2-18 and i got 2 bsods, stating "IRQL NOT LESS OR EQUAL"
http://img21.imageshack.us/img21/1760/myoverclock015by.jpg


Do you think the reason why the cpu isnt stable is because of the current htt (was above 320) ?
BTW it passed a Super_PI 2M test.

If i increase the multiplier to 9x and and fsb to 290 (9*290 = 2610), will it help? BTW i promise that >2.6ghz will be the highest i will go.

I currently have the cpu at 8*320 = 2560. Will try and run 3dmark05 again. :x

EDIT: I was successful in running 3dmark05 with 8*320 = 2560 , pic
http://img245.imageshack.us/img245/5653/myoverclock0039xh.jpg

2nd Edit: Oh well, i think i'll stick to 2.56ghz from now on. I feel really lucky anyway for getting this far. Never expected my mobo to let me oc this high. Many thanks to everyone, especially Wentelteefje