Manual OC 2500k on z68AP-D3 ?

Borsch

Borsch

Borsch

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10 Jan 2012
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Hello,

Please bear with me, this will be my first ever OC via bios (I've only overclocked my previous Dell C2D from 2.00 to 2.66GHz with a piece of kitchen foil hehe).

I have a Gygabyte Z68Ap-D3 mobo and would like to do a manual overclock as I understand this way I will likely run at lower voltages and thus cooler temps.

This is my OC "template" (from another forum):
OC'ed manually with a x45 multiplier a vCore of 1.28(cpuz shows 1.272) and RAM at 1600 Mhz (I set that when I put the rig together).
The result is here http://valid.canardpc.com/show_oc.php?id=2140622
That failed Prime 95 as well after 40mins so I tried again at 1.305V @4.5GHz, after 130 mins stable with 60C max on the cores, happy days.
So I have a clock speed just shy of 4.5Ghz and a max temp of 60C while running Prime95 torture test, compared with 4.2Ghz at 63C(max) with a 1.344 Vcore. Manual overclocking for the win
Click to expand...

My question is: do I need to set anything for RAM in BIOS? When I assembled the PC with 2x4Gb Corsair Slimprofile 1600 1.5v 9-9-9-24, it was straight plug'n'play - I did not change any of its settings. Will I need to change them for manual OC?
This is what CPUz shows for RAM right now, before any OC:



I am confused by its "668.6Mhz":confused:

But CPU tab of CPUz shows this:


1600Mhz does feature here - so RAM does run how it should?
Once again, do I need to change anything with reagrds to RAM for my OC?

Follwoing that, do I need to use "Turbo" or "Multiplier" to OC - is Turbo a "smart function" where Windows will adjust it according to needs, and multiplier a "dumb" permanent OC? Do I need to disable TUrbo for manual OC?

Ok, I think thats enough questions for the first post :)
 
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Relevant BIOS screenies:

I cant see the Vcore numbers, there is only dynamic Vcore slider that sits on 0.00, but even it does not show its current actual value (like 1.34V or something).

RAM shows at 1333Mhz- but is that boosted to 1600 when necessary by W7/ Turboboost, or is it just stuck at 1333 all the time right now?
Menu1


Menu2


Menu3


Menu4
 
As you are using DDR ram it will be running at twice the speed shown in the DRAM Frequency tab in cpuz, "DDR = Double Data Rate"
So you are currently at 1337.
Easiest way would be to check if your RAM has an XMP and then find in your BIOS the XMP setting and change it to enabled. Also check the RAM is getting the correct voltage as per the RAM specs.
 
Many thanks for you time, RAM is now seemingly sorted - 1600MHz was shown at boot and CPUz now shows DRAM Frequency @ 802.4 MHz

However, I'm now running Prime and temps are increased by about 3-5 degrees (compared to what they were when XMP was disabled. Also when enabling XMP in BIOS, it asked "Did I want to speed up my comuter", I selcted "yes"). Is that because XMP is some sort of "eazy OC" solution that is also liable to overvolt? Is there a Manual equivalent to XMP?
 
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This is my current successful attempt at OC- passed 20 minutes of Prime.

I've switched off Turbo Mode (it said in BIOS that with it disabled OC is more stable) and right now I'm trying x43 multiplyer at Vcore 1.284V.
So, yes, it appears that DRAM voltages are ok, timings are still 9-9-9-24 - so that good too.

Another question that I have is that DRAM Voltage is shown at 1.524V. WOuld it be beneficial to lower that Voltage too (once again to keep temps to a minimum)? DRAM should run at 1.500V or even below that, right?
 
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I have the same board and the dynamic vCore is a pain, but I set:

Ram - Manually set to 1600mhz as the XMP seemed to slow boot times (Checked 4-5 times with it on and off and it was the only independent variable hence it must've been the cause.
Clocks - Turbo mode off, Real time ratio changes on, 45 multiplier, hits 65 degrees under load (Raised vcore so understandable)

That's with a 2500k aswell but it's hyperX 1600mhz ram (8gb)


Good luck sir! I suggest you download TouchBIOS from gigabytes site - It'll save some time.
 
@sehcure what settings did you use in dynamic vcore to clock @4.5?. At the moment I'm overclocked at 4.3 but whenever I try any higher it wont boot in to windows, I've taken the dynamic vcore setting up to + 0.100 but still no luck.
 
FiXiT said:
@sehcure what settings did you use in dynamic vcore to clock @4.5?. At the moment I'm overclocked at 4.3 but whenever I try any higher it wont boot in to windows, I've taken the dynamic vcore setting up to + 0.100 but still no luck.
Click to expand...

Had it at 0.100 and mine wouldn't boot once I went past 4.2, so I upped it to +0.150 and it's working fine now.

I still don't understand how it works really - if normal is 1.220v, then +0.100 would make it 1.320v which is easily enough to reach 4.5 on a 2500k..

I still don't see the 1.370v I should in hwmonitor - This dynamic stuff confuses me.
 
depends if you have a D1 or D2 revision, D1's are not that great over 4.3ghz.
I struggled to get mine over 4.3ghz yet when I got the D2 it was a breeze.

eg D1 needed extra voltage and other tweaks just to get 4ghz, D2 does it on stock.

as for RAM my Corsair recommends 1.6v for 1600mhz so Borsch click on the SPD tab and it shows voltage for each speed.
 
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FiXiT said:
Before you upped the dynamic vcore to +0.150 did it keep on looping from black screen to Gigabyte bios screen?
Click to expand...

Yes.

At first I was worried i'd screwed something up terribly. It appeared to get bast bios screen, then when it would usually show 'Loading OS' and start loading windows it just remained black until it went back to the bios screen.

Worrying to say the least...
 
looks like I’ll have to give it some more then, like you was a little worried about taking it higher. It’s strange because I’m running stable @ 4.3 with a dynamic vcore setting of –0.060
 
It is a i7 2600k but basically the setting are very similar to the i5 2500k
Are all 2600k Revision D2's?
 
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varkanoid said:
as for RAM my Corsair recommends 1.6v for 1600mhz so Borsch click on the SPD tab and it shows voltage for each speed.
Click to expand...

Cheers for that - mine is 1.5V for 1600.

My chip is D2 as well :)

Aaaand, my OC works and I am happy:)

I decided to stop at 4.3GHz, Vcore 1.284V for now :) I only have Freezer 7 Pro CPU cooler, so temps when running Prime for 20 minutes are approaching 65+ even with that voltage.

Couple of points: in order to make sense of Dynamic Vcore, I would set the +/-0.xxx value, reboot back into bios and see the actual Vcore value on the M.I.T. screen.
Manual overclock is FAAAR better than just turning up Turbo, as Turbo has put my Vcore to a rather hot 1.344V (compare to my manually found stable and much cooler voltage of 1.284V!). So manual OC is definitely worth spending some time on - about an hour is all it takes (not counting Prime benching - this can be done as background task)

Here are my settings if anyone else needs them in the future - budget Gygabyte z68AP-d3 is very good board for the money imho.




 
FiXiT said:
It is a i7 2600k but basically the setting are very similar to the i5 2500k
Are all 2600k Revision D2's?
Click to expand...

not really its a different chip, different defaut speed, has more L3 cache so your base line is not the same as a 2500k so settings may not work as well for yours as they would a 2500k. Would be better off asking 2600k users what settings they use and there was a massive 2600k overclocking thread on here at one point.
 
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