OC Thuban

[grandpatzer]

I recently got a Phenom II X6 1045t 95w to play with.

Here is settings stable Intel Burn test 2gb 10 passes, although it feels like horizontal artifacts on screen, so might have to decrease OC.

NB and HT Link is 1834 MHz
XMS3 Vengeance 1600 CL9 is: 698.7MHz 9-9-9-24 tRC 41.
CPU voltage is 1.425v
Locked multi so FSB is 262x13.5= 3571MHz

It passes 10 runs of 2gb Intel burn test and at most the temperatire was 59c.
----------------------------------------------------------------------------------------------------------------------

It immediately failed:

NB HT 1904MHz
DDR3: 725MHz 9-9-924 tRC 27
CPU voltage is 1.425v
Locked multi so FSB is 272x13.5= 3672MHz

I suspect is might have been because tRC was on AUTO and cpuz showed 27 which might be too agressive compared to CPUz SPD value.

 

[sirmonkey1985]

well it definitely isn't the NB or HT clocks. cpu voltage is low for 3.6Ghz, so yeah i'd say its definitely the ram timing.

 

[grandpatzer]

well it definitely isn't the NB or HT clocks. cpu voltage is low for 3.6Ghz, so yeah i'd say its definitely the ram timing.

What is best way to get HT & NB 2000MHz and Memory 1600Mhz?

The memory is according Corsair 9-9-9-24, opening CPU-Z under SPD it says for 800MHz:
9-9-9-24 and TRC 41.
**************************************************************************************************************

Now when I run 240 FSB and put NB to 1920 in BIOS Memory 1280 then inside Windows 7 the NB is 2400MHz!!!!

So I put memory in BIOS to 960MHz and now in windows 7 NB is 1920MHz.
But I want 1600Mhz on memory not 960MHz....

I was able to put voltage to 1.400v, FSB 237, memory 1580MHz and FSB 1659MHz.

 

[pgaster]

You have to first understand what is going on.
See here for some specs: http://www.cpu-world.com/CPUs/K10/AMD-Phenom II X6 1045T - HDT45TWFK6DGR.html

Multiplier is 13.5
system clock is 200
multiply those and you get the stock speed of 2700
HT multiplier is 10
NB multiplier is 10
10 x 200 = 2000 for each of those
memory, if it runs at 1600, is really 800 mhz. it is dual data rate and the 1600 is effective
200 system clock x 4 for the memory multiplier is what gives you 800

so you want to overclock.....

here is what you do:

change the HT and NB multiplier to 8 for each. Now the mobo bios may not list the multiplier directly. Some boards may say 1600 for this, which is the 8 x 200
(it will say 2000 to start with before you change it)

also change the system clock to 250
why? because the 8 x 250 puts you back to 2000 for NB and HT

now you also need to change the memory divider so the memory is not overclocked too far, so change the memory to the 1333 setting
let me explain this....
1600 memory is the EFFECTIVE speed, it really runs at 800
800 / 200 system clock = 4 for the memory divider
we changed the system clock to 250, so 250 x 4 would be 2000 and that would push your memory to 2000 which it will not run at, so this is the reason to change to the lower 1333 divider

1333 ram runs at 666
666 / 200 = 3.33
250 system clock x 3.33 = 832 and then the effective speed your memory is running at will be 1666

this is overclocking your ram, but it should take that small overclock without a problem, but of course there is no guarantee

If you use 250 and the 1066 divider, then the ram ends up at 1333 perfectly
keep this in mind just in case you need it

for cpu speed, 13.5 x 250 = 3375
not a huge number, and that is the reason the BE cpus are so popular
with a BE it is easier to get a big overclock
if you wan more than 3375 you have to do more math and tinkering to find something that works for overall cpu speed, HT, NB, and memory speeds


edit: leave the memory timings alone at first, just change the multiplier like I suggested

 

[grandpatzer]

You have to first understand what is going on.
See here for some specs: http://www.cpu-world.com/CPUs/K10/AMD-Phenom II X6 1045T - HDT45TWFK6DGR.html

Multiplier is 13.5
system clock is 200
multiply those and you get the stock speed of 2700
HT multiplier is 10
NB multiplier is 10
10 x 200 = 2000 for each of those
memory, if it runs at 1600, is really 800 mhz. it is dual data rate and the 1600 is effective
200 system clock x 4 for the memory multiplier is what gives you 800

so you want to overclock.....

here is what you do:

change the HT and NB multiplier to 8 for each. Now the mobo bios may not list the multiplier directly. Some boards may say 1600 for this, which is the 8 x 200
(it will say 2000 to start with before you change it)

also change the system clock to 250
why? because the 8 x 250 puts you back to 2000 for NB and HT

now you also need to change the memory divider so the memory is not overclocked too far, so change the memory to the 1333 setting
let me explain this....
1600 memory is the EFFECTIVE speed, it really runs at 800
800 / 200 system clock = 4 for the memory divider
we changed the system clock to 250, so 250 x 4 would be 2000 and that would push your memory to 2000 which it will not run at, so this is the reason to change to the lower 1333 divider

1333 ram runs at 666
666 / 200 = 3.33
250 system clock x 3.33 = 832 and then the effective speed your memory is running at will be 1666

this is overclocking your ram, but it should take that small overclock without a problem, but of course there is no guarantee

If you use 250 and the 1066 divider, then the ram ends up at 1333 perfectly
keep this in mind just in case you need it

for cpu speed, 13.5 x 250 = 3375
not a huge number, and that is the reason the BE cpus are so popular
with a BE it is easier to get a big overclock
if you wan more than 3375 you have to do more math and tinkering to find something that works for overall cpu speed, HT, NB, and memory speeds


edit: leave the memory timings alone at first, just change the multiplier like I suggested

Thanks this makes sense, my mobo does not show multi instead just the numbers.

I'm currently running almost all at stock with TURBO enables, once I learn 100% the overclocking I will try.

Is it normal that when I put CPU Voltage 1.25v with TURBO Enables that the FSB is 170-220 and multi is 13.5-16 according my Everest loggin during gaming?

 

[pgaster]

I would leave the cpu voltage alone and leave that at stock now. The stock setting should work fine for the overclock I mentioned too because it isn't so extreme of a jump.
Just leaving it at stock is fine for now. I'm sure it will run games just fine like that.

Yes, when you run a game that does not take advantage of all cores, Turbo will kick in and some cores will run at a higher speed. The multiplier for those cores is jumping up to make them run faster and that is normal. I'm not sure about the FSB part, but if games are running smoothly and the computer seems to run fine then I doubt there is any problem.

 

[OmegaSupreme]

Oh boy, looks like I'm going to have to interject. I'll do a small write up when I get back to my rig. (On my phone ATM.

 

[OmegaSupreme]

OK finally got to my rig.

I skimmed through your earlier posts and after reading slightly I facepalmed and stopped. So Sorry if I may go over something again.

At any rate, lets start out by addressing your choice of stress testers. INTEL Burn Test is an absolutely HORRIBLE stress testers for AMD's. As is anything that's based on that test such as LinPack and OCCT. On another forum I used to frequent more, a member there ran TWO INSTANCES of Linpack @ max for 18 hours straight on his overclocked 1100T --that's 500 passes. Passed with flying colors. He fired up Folding at Home and BSOD'd within 5 minutes.
He said that he has never had a Prime95 stable OC that failed folding at home. He has since removed IBT, Linpack and OCCT from his stress testing regimen.

So with all that said, Prime95 your OC to see if it's at all stable. I'd recommend to let it run as long as possible using the blend test. I'm actually testing an x3 720 @ 3.5 (250x14) , 2500MHz CPU-NB as we speak. So far it's 8 hours stable.

Now lets move on to the memory. What you see in CPUz shows your memory frequency, however you're forgetting that it's DUAL data rate, hence it's called DDR. So whatever you see in CPUz you need to double and that is what you're RAM is running at.

Now lets move on to the timings. Why is your tRC so high? Here's a "rule of thumb" I concocted that seems to work really well for setting timings including tRC.
CAS (CL) + RAS to CAS delay (tRCD) + RAS Precharge (tRP) = Cycle time (tRAS); then tRP + tRAS = tRC. Now there's a little bit of leeway with the tRAS as you can tighten it up (numerically lower). However, I wouldn't go lower than 24 unless you're going for 7-7-7 or 7-8-7 timings. However, the tRC should be calculated out.
Personally, I have found this formula to work really well especially when going fo high CPU-NB frequencies coupled with high RAM frequencies.

Speaking of which, AMD CPU's are only rated to run RAM at 1333MHz. Anything over that is considered an overclock. I see that you want to run it @ 1600, but at what timings? 9-9-9-24? See that really sucks. Not to mention having your RAM at that high of a frequency will limit your ability to get a good OC out of the CPU-NB.
It's better to lower your RAM to 1333, increase the CPU-NB frequency and tighten up the timings. You'll actually get better performance from 1333 with 7-7-7-21-28-1T timings than with it @1600 9-9-9-24-34. AMD's LOVE tight timings. you get a fairly hefty speed boost from it.

At any rate, I read over pgasters post and he seems to have covered the rest I was going to talk about.

Good Luck!

 

[teletran8]

I agree with Omega Supreme use Prime.

Also look online or try yourself (trial and error) for tighter memory timings in your bios bro.