2500k. Wont boot anything but Stock and 4.7ghz

Slufa111

Senior member
Oct 13, 2002
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I tried 4.0 and it booted but got a BSOD

Tried 4.1 Blank screen with cursor
Tried 4.2 Blank screen with cursor
Tried 4.3 Blank screen with cursor
Tried 4.4 Blank screen with cursor
Tried 4.5 Blank screen with cursor
Tried 4.6 Blank screen with cursor
Tried 4.8 Booted but requires a 1.45 VCORE+
Tried 4.9 Blank screen with cursor
Tried 5.0 Blank screen with cursor
Tried 5.1 Blank screen with cursor

HOWEVER, my 2500k WILL boot at 1.4V @ 4.7ghz

Does that seem at all weird? I am thinking my motherboard has something wrong with it.


I am thinking of RMAing it for a ASUS or Gigabyte Z68
 

grkM3

Golden Member
Jul 29, 2011
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My asus p67Pro is acting up or I messed up my ram pushing 2240 with 4 sticks,I went from 100% stable to the smallest adjustment and total unstability.

try pll enabled and setting the ram timings a little looser.

what board are you on now?
 

Slufa111

Senior member
Oct 13, 2002
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Yeah I thought of that but why would it be Prime 95 Stable @ 4.7ghz @ 1.4V but it wont even boot at 4.4ghz @ 1.35V or 1.4V? I figured if it was the memory it wouldn't boot after a certain overclock, not just a random location (which is the x47 multiplier)
 

grkM3

Golden Member
Jul 29, 2011
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on my board the 46 and 47 multys are the sweet spot,like I can get 46X105 stable but 48-49 multys suck and then 50 and 51 are stable.

try pll overvolt enenabled if that board has that.

also on my board with 4 sticks installed I can only get it to boot with 8-10-8-2t and 9-10-10-2t at 2133 and no other timings will even post.

with 2 sticks installed I can boot with 6-7-7-1t,7-7-7-1t ect. once I went 4 sticks the system needed to be tweaked for days to find out what works.

its weird tighter and faster timings work 100% stable and then I lossen one up and its not very stable at all.
 
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Slufa111

Senior member
Oct 13, 2002
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PLL is enabled.

I am thinking of switching motherboards....but then again i could have gotten a crappy CPU batch
 

grkM3

Golden Member
Jul 29, 2011
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be carefull on the ram volts also,I just rocked my chip and threw in my old 2500k,my 2600k wont even post now with 4 sticks at 2133 and it was 100000% stable for months until I tried to push it last night and upped the dram to 1.685 and that was enough to strees the memory controller enough to screw it up.

Im so upset since that chip did 5 ghz on air with 4 sticks at 7-9-8-2t at 2240 mhz that gave me over 26000 mb/sec mem bandwith.

Im also changing my board and getting a ud5 or ud7 gigabyte board
 

Slufa111

Senior member
Oct 13, 2002
813
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Well Intel says not to push ram above 1.6V

Some say 1.65V is safe...apparently not. lol
 

Slufa111

Senior member
Oct 13, 2002
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haha

I think I am going to get the ASUS SABERTOOTH P67. Good reviews and good benchmarks.
 

blackened23

Diamond Member
Jul 26, 2011
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be carefull on the ram volts also,I just rocked my chip and threw in my old 2500k,my 2600k wont even post now with 4 sticks at 2133 and it was 100000% stable for months until I tried to push it last night and upped the dram to 1.685 and that was enough to strees the memory controller enough to screw it up.

Im so upset since that chip did 5 ghz on air with 4 sticks at 7-9-8-2t at 2240 mhz that gave me over 26000 mb/sec mem bandwith.

Im also changing my board and getting a ud5 or ud7 gigabyte board

Ouch, sorry to hear about that.

Yeah, over volting or even overclocking RAM isn't such a good idea with sandy bridge, the performance increase is extremely minimal with oc'ing, and overvolting is just bad news since SB has an integrated memory controller. To anyone trying an oc , I wouldn't fiddle with the RAM voltage ....i'd stay with 1.5V firm to ram no matter how high the OC is. OC'ing the ram to 2133 should be fine if your ram is up to the task, but I wouldn't over volt to much to get there.
 
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grkM3

Golden Member
Jul 29, 2011
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Im almost back to where I was,I think my board was just in a haze,I just reflashed the bios and im back up to 2133 with 4 sticks that seems stable.Im running 8-10-10-2t@2133 now on the 2500k and will swap the 2600k back in and re test

It passes 32m pi and intel burn test set on very high using 4gb of ram
 

blackened23

Diamond Member
Jul 26, 2011
8,548
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Well Intel says not to push ram above 1.6V

Some say 1.65V is safe...apparently not. lol

the leeway with over volting RAM is much smaller now since SB has an IMC. Personally I wouldn't do it, I tend to err on the side of caution though.
 

Slufa111

Senior member
Oct 13, 2002
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All the P67 motherboards and Z68s dont have AWESOME benchmark reviews.. hard decision
 

Patrick Wolf

Platinum Member
Jan 5, 2005
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and this is why I do not buy used or even open box pc components. :p

My GTX 460 and P8Z68-V Pro ($150 & came with all accessories) were open box from newegg and have been great. :thumbsup:

Haven't tried pushing higher than 4.5 yet. I just set the multi and called it good. Didn't change vcore or anything else.
 

MadScientist

Platinum Member
Jul 15, 2001
2,183
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OP, Your first post results are a bit weird.

Your ram settiings appear to be ok. You can run Memtest86+ just to make sure that it's not a ram problem. http://www.memtest.org/#downiso

Try this first:
1. Reset everything to default. Under Exit in your bios "Load UEFI Defaults". Reboot to bios.
2. Under OC Tweaker "Load Optimized CPU OC Settings" start with Turbo 4.0Ghz
3. Under Dram Configuration set Load XMP Setting to Profile 1.
4. Save and Exit. If this loads into Windows then start raising your Optimized CPU Settings to 4.2, 4.4, 4.6, 4.8. If these settings boot into Windows then your CPU and MB are most likely ok.

110728085836.jpg


110726093334.jpg


If you are running under Fixed vcore mode:
1. C1E, CPU C3/C6 State, CPU Thermal Throttling - enable these
2. PLL Overvoltage - set to Enabled
3. Set LLC to Level 1 or 2.
4. Under DRAM configuration set Load XMP Configuration to Profile 1
5. Set Turbo Boost Power Limit to Manual, when this is set to Auto the default values will cause your CPU speed to throttle back.
3 more settings will appear under it.
Set Short Duration Power Limit to 200 - 300
Set Long Duration Power Limit to 200 - 300
Set Long Duration Maintained (sec) to 1
6. Start with 4.0Ghz at stock voltage and work your way up from there, increasing vcore as needed.

FYI,
The XMP profile on my ram is 1.65V. It runs fine at that voltage. Yours is 1.5V.
 

blackened23

Diamond Member
Jul 26, 2011
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FYI,
The XMP profile on my ram is 1.65V. It runs fine at that voltage. Yours is 1.5V.
Just to be clear, the issue isn't whether the RAM can handle 1.65. Thats laughable, are you kidding? of course it can handle 1.65V. The memory controller is integrated on Sandybridge, thats the problem - if you over do it for extended periods it will degrade the CPU. This wasn't the case with previous generations of CPU's, as most of them did not have IMC. SB IMC is rated for 1.56 max V to ram if memory serves correctly - Standard disclaimer about cpu degradation not happening overnight but I have seen reports of CPU's burning out from over volting the RAM too much. Which can obviously happen due to the MC being integrated on nehalem and SB CPU's. But these boards are filled with extreme risk takers, YMMV of course, do whatever suits you.
 
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toyota

Lifer
Apr 15, 2001
12,957
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yeah if that memory is rated to run at 1.65 then it is not really suitable for Sandy Bridge.
 

MadScientist

Platinum Member
Jul 15, 2001
2,183
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The object of this thread is to try and help the OP solve his weird overclocking problem, not to debate ram voltages.
 

Slufa111

Senior member
Oct 13, 2002
813
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I tried boot at 48X and blinking cursor so I upped the vcore and blinking cursor.

I tried 46X at the same voltages as of 47X.


I have a feeling its the motherboard because the BIOS feels jittery or flaky. I don't really know how to describe it. In any event we will see, I returned the P67 Extreme6 in exchange for ASUS P8Z68-V PRO and the Hydro Series H80.
 

grkM3

Golden Member
Jul 29, 2011
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try 2 sticks of ram only and set the timings to 9-10-10-27-2t also Im sure you have checked this but what memory speed are you setting the chips to run at?

try running them at 1600

I found out my issue,one of my sticks wont do 2200+ 7-9-7-24-1t anymore and it was causing major instability.Im testing my other ones right now running 32pi at 7-10-10-27-1t 1.65 volts and its rock stable again.

this sucks as I ordered a gigabyte z68 ud7 board today from newegg for 360 bucks shipped.

Ill call them asap in the morning to cancle as I thought it was my board.

I was trying to break 27500 mb/sec in aida64
 

blackened23

Diamond Member
Jul 26, 2011
8,548
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0
try 2 sticks of ram only and set the timings to 9-10-10-27-2t also Im sure you have checked this but what memory speed are you setting the chips to run at?

try running them at 1600

I found out my issue,one of my sticks wont do 2200+ 7-9-7-24-1t anymore and it was causing major instability.Im testing my other ones right now running 32pi at 7-10-10-27-1t 1.65 volts and its rock stable again.

this sucks as I ordered a gigabyte z68 ud7 board today from newegg for 360 bucks shipped.

Ill call them asap in the morning to cancle as I thought it was my board.

I was trying to break 27500 mb/sec in aida64

I truly don't understand why anyone would even bother oc'ing their RAM, it makes little to no difference in real world applications. Especially if it involves overvolting the RAM (not smart).

http://www.anandtech.com/show/4503/sandy-bridge-memory-scaling-choosing-the-best-ddr3/6

Why? To thump your chest over a memory benchmark? I'm pretty confused. Oc'ing from DDR3-1600 999-24 to DDR3-2133 results in a .2 fps increase in metro 2033, and no difference in crysis 2. IMHO all that energy and effort would be better served on a better cpu or cpu/gpu overclock.