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post #12551 of 13131
Quote:
Originally Posted by EkseF View Post

If your going to keep them enabled you might as well not overclock at all.

I don't agree, I run 4ghz with CnQ, even if I could only get to 3.8ghz it would still be "worth it" It's crazy to run it on max power draw 24/7, it's like leaving lights on in 5 rooms while you browse on firefox wink.gif

If you are benchmarking then yeah, anything that causes instability should be turned off but who runs benchmarks all day? Also there is the question as to whether an overclock is truly stable if you have to disable things that in the real world would be ideal to have enabled. Like the people that say they can boot into windows at 5.5ghz on a cpu, what good is that if it crashes when you open the calculator lol.

I don't totally disagree with the statement though. It just depends where you draw the line, and it's a grey fuzzy line too smile.gif
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post #12552 of 13131
Quote:
Originally Posted by EkseF View Post

disable cool and quiet for overclocking, also spread spectrum, turbocore and such features. what exactly is your ram, what is it rated for? if your not sure look at the receipt for ram part details of when you purchased it.

RAM: 2x Kingston HyperX DDR3 4GB (2x2GB) 1600MHz Non-ECC CL9 (KHX1600C9D3K2/4GB) i set on auto and try on set - 9-9-9-27 and 1.7 to 1.9 volts - but results = picture freez example in Bf3

On 1333 all is ok ... frown.gif
post #12553 of 13131
I have a question related to the north bridge of CROSSHAIR IV FORMULA.
According to the board specs the RAM can be DDR3 2000(O.C.)/1800(O.C.)/1600(O.C.)/1333/1066 , what does this O.C. mean?
Does it mean that the NB works out of AMD specs but ASUS guarantees that is can work at that frequency?
Does the user need to change the default NB voltage and if so how are these considered officially supported is they can't be reached using default voltages?

On the other hand if default voltages can be used with that frequencies why do I see many owners of this board that have changed the NB voltage (in the owner table in the fist page)?

Alex
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post #12554 of 13131

O.C. = overclocked

the more you overclock - the more you need higher voltages

don't go to high there is a limit

you can set voltages to auto and overclock and the motherboard will increase voltage as need to a point

no guarantees and no officially supported its just that these motherboard will overclock very well


Edited by Tweeky - 2/13/13 at 2:59pm
    
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post #12555 of 13131
Quote:
Originally Posted by alexan_e View Post

I guess I can try C&Q and see how it goes, thanks.

Can you please point me to your bios guide?

Alex

Here's the basic setup guide,

These are settings that I use (manually enter) with bios versions 1304, 1902, 2002, 2002 MOD bios, and are not the only options available, but are used by many others with good results. One option I have not worked with is the D.O.C.P (Dram Over Clock Profile) and if your Dram is an issue I’d encourage it’s use.
Ai Overclock Tuner – Manual
CPU Ratio - (16.0 for stock Thuban 3.2GHz)
AMD Turbo Core – Disable (not applicable with all CPU’s)
CPU Bus Freq - (200MHz for stock Thuban)
PCIE Freq – 100
Dram Freq – Manually enter Dram factory spec freq
Dram Timing Configuration – Manually enter factory timing specs and verify with CPUZ under memory tab
PWM Phase Control – Full Phase
CPU Voltage OCP – Enabled
CPU PWM Freq - Auto
CPU Load Line Calibration – Full - be sure and watch load voltage! Using this should allow a lower Vcore in bios. PM me if you’d like more info on LLC. Be careful and watch the Vcore while under load (1.5-1.55v max)
CPU/NB LLC – Full - be sure and watch load voltage
CPU/NB Voltage OCP – Enabled
Extreme OV – Disabled
CPU & NB Voltage Mode – Offset or Manual, using Offset Voltage allows use of Cool & Quiet up to a multiplier of 18x. (I encourage Offset Mode)
CPU VDDA voltage – Auto
Dram Voltage – Manually enter factory spec,
Be sure and test Dram with no OC using LinX or 32M run of SuperPi after booting into windows. You may find a need for a slight increase (.05v to .1v on AMD Platform)
HT Voltage – usually auto is fine for a 4.0GHz
NB Voltage – usually auto is fine for 4.0GHz if you have a BE CPU. Non BE CPU’s may require additional volts as this is for the chipset which may need an increase when going past 260MHz CPU Bus Freq. (stock is 1.11, max around 1.3v. I have seen this as high as 1.5v in extreme cases for long periods of time.
NB 1.8v – auto
CPU Spread Spectrum – Disabled for stability
PCIE Spread Spectrum – Disabled for stability
Be sure manually enter a value for both CPU Voltage and CPU/NB Voltage (not auto)
All other settings can stay at default or auto for most cases.





Quote:
Originally Posted by alexan_e View Post

I have a question related to the north bridge of CROSSHAIR IV FORMULA.
According to the board specs the RAM can be DDR3 2000(O.C.)/1800(O.C.)/1600(O.C.)/1333/1066 , what does this O.C. mean?
Does it mean that the NB works out of AMD specs but ASUS guarantees that is can work at that frequency?
Does the user need to change the default NB voltage and if so how are these considered officially supported is they can't be reached using default voltages?

On the other hand if default voltages can be used with that frequencies why do I see many owners of this board that have changed the NB voltage (in the owner table in the fist page)?



Alex

a. The O.C. means you'll need to raise the CPU Bus Freq (Ref Clock) to achieve the higher Dram Freq as AMD does not natively support the higher freq,s but the mobo does. Research or ask more ???'s if you don't know how the Ref Clock changes everything at once. There is a method to the madness. I'd be happy to share what I know.

b. The actual NB Voltage doesn't change a lot with simple OCing until you get close to 260-270MHz Ref Clock. I think you're referring to the NB Freq (not the NB). Yes the NB Freq will perform way above what AMD supports. Stock is 2000MHz, most Thubans can run 3000MHz and some of us run 3200+MHz. Just depends on your system.

c.OCing is not supported by the manufactures, but they do leave headroom for us that love to play.
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post #12556 of 13131
Sandman, thank you for the setup guide.
It has been a while since I have overclocked an AMD cpu ( it was AMD X2 5000+) so I'm current refreshing my knowledge on that , I have already read several guides and keep reading..

I'm clear about the cpu/NB and the Ref Clock and multipliers.
I also understand that cpu/NB frequency can not be higher than the HT frequency which means that you raise them together.

If my understanding is correct the motherboard board supports HT3.0 which is 2600MHz so I assume the (motherboard) NB voltage will only need to be increased if someone pusher the HT frequency to a higher level, so why do I see several users with HT frequency <2600MHz with changed NB voltage in the owner spreadsheet ( https://spreadsheets.google.com/pub?key=0Auak7crpAs7ydEV1V1IyY1plMW9WSFdFbVpXLWpZUVE&w=100&h=500 )

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post #12557 of 13131
Quote:
Originally Posted by alexan_e View Post

Sandman, thank you for the setup guide.
It has been a while since I have overclocked an AMD cpu ( it was AMD X2 5000+) so I'm current refreshing my knowledge on that , I have already read several guides and keep reading..

I'm clear about the cpu/NB and the Ref Clock and multipliers.
I also understand that cpu/NB frequency can not be higher than the HT frequency which means that you raise them together.

If my understanding is correct the motherboard board supports HT3.0 which is 2600MHz so I assume the (motherboard) NB voltage will only need to be increased if someone pusher the HT frequency to a higher level, so why do I see several users with HT frequency <2600MHz with changed NB voltage in the owner spreadsheet ( https://spreadsheets.google.com/pub?key=0Auak7crpAs7ydEV1V1IyY1plMW9WSFdFbVpXLWpZUVE&w=100&h=500 )

Alex

There is little to no performance gain when raising HT Link Speed with a Phenom II. Usually 2000HZ +/- 200MHz is where the results are best. The big gains come from increasing the NB Freq. This can be seen with a quick MaxxMem run while noting the "Reached Memory Score".

Have a look http://www.overclock.net/t/555061/guide-am3-cpus-which-ram-speed-is-faster-and-which-cpu-nb-clock-is-best
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post #12558 of 13131
1) The cpu/NB refers to the internal cpu controller while the motherboard NB (890FX) is a different thing, right (and there is a voltage setting for both)?

2)The memory bus and memory operating frequency is only related (as a bus) to the internal cpu/NB and there is a direct connection from that to the RAM?

3) The motherboard NB (890FX) is only related to the HT frequency and can work up to 2600MHz (Up to 5200 MT/s ; HyperTransport™ 3.0 ) without having to tough its voltage, is that correct?
so only when HT increases more than 2600MHZ the motherboard NB (890FX) voltage has to be increased too?

Please reply to each one of the above.

Now I have read two guides, one is logan's guide where it says
Quote:
The NB and HT are related, and in fact, you can't set the NB speed any higher than the HT speed
Does this refer to the cpu/NB ?

If so then there is another tutorial guide from tony that says the opposite
Quote:
Remember HT clock can not be higher than the CPU-NB clock

So which is the case , HT >= cpu/NB or cpu/NB >= HT ?

I have read the article you refer to which talks about the cpu/NB frequency increased from the default 2000MHz up to 3000MHz.
Now depending on the reply in the previous question either the HT frequency has to match that cpu/NB frequency (because it can never be lower) or it can stay to a much lower frequency close to 2000MHz

Thank you for your help.
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post #12559 of 13131
Quote:
Originally Posted by BenL View Post

RAM: 2x Kingston HyperX DDR3 4GB (2x2GB) 1600MHz Non-ECC CL9 (KHX1600C9D3K2/4GB) i set on auto and try on set - 9-9-9-27 and 1.7 to 1.9 volts - but results = picture freez example in Bf3

On 1333 all is ok ... frown.gif

What the heck are you doing with the voltages, stick to 1.5. Edit: 1.65 on 1600 with 9-9-9-27 the ram is guaranteed to work at those settings with that voltage, you don't need to increase it like that. Unless your going really crazy on overclocking. Edit#2: Also set all of your ram settings to auto aside from 99927

Quote:
http://www.kingston.com/datasheets/khx1600c9d3k2_8gx.pdf
Total kit capacity is 8GB. Each module kit has been tested to run at DDR3-1600 at a low latency timing of 9-9-9-27 at 1.65V.

Edited by EkseF - 2/14/13 at 6:13am
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post #12560 of 13131
My settings:



Now is ok? But on this settings i had freezing screen.

Edit: on 1600 had 2 frezz, settings like on pictures.

On 1333 ale works fine. Any idea?
Edited by BenL - 2/14/13 at 10:21am
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