Intel i5 2500k

zx128k · 27 Jan 2012 at 13:29

Specs I have found.

Vcore max. = 1.52 volts [1]
Voltage memory max. = 1.65 [3]
Processor I/O supply voltage for DDR3 = 1.425(min), 1.5(normal), 1.575(max).
T case max. = 72.6 C [2]
Voltage for the system agent = 0.879(min), 0.925(normal), 0.971(max).
PLL supply voltage (DC + AC specification) = 1.71(min), 1.8(normal), 1.89(max).

Processor Clocking (BCLK[0], BCLK#[0]) (leave this at default)
The processor uses a differential clock to generate the processor core operating frequency, memory controller frequency, system agent frequencies, and other internal clocks.

Sources:
[1] - http://communities.intel.com/message/133908
[2] - http://ark.intel.com/products/52210?wapkw=i5 2500k
[3] - motherboard manual P8Z68-V/GEN3 p2-6 DIMM voltages below 1.65v is recommended to protect the cpu.

stulid · 27 Jan 2012 at 13:31

Is that really your 2nd post in over four years of forum membership?

Witcher1979 · 27 Jan 2012 at 13:34

wow I need to get one of those i5's they look awesome.

davethe11 · 27 Jan 2012 at 13:34

stulid said:
Is that really your 2nd post in over four years of forum membership?

/chuckle

zx128k · 27 Jan 2012 at 13:42

Processor Absolute Maximum Rating
Symbol Parameter Min Max Unit Notes
VCC Processor core voltage with respect to Vss 1.4 V (No higher than 1.4 vcore).
PLLProcessor PLL voltage with respect to Vss 2.0 V
Processor IO supply voltage for DDR3 with respect to Vss 1.85 V
Processor SA voltage with respect to Vss 1.4 V
Processor analog IO voltage with respect to Vss 1.4

http://www.intel.com/content/www/us/en/processors/core/core-i7-lga-2011-datasheet-vol-1.html page 60 approx. table 7-8

Electrical Specifications60 Datasheet, Volume 17.4
Absolute Maximum and Minimum Ratings Table 7-8 specifies absolute maximum and minimum ratings. At conditions outside functional operation condition limits, but within absolute maximum and minimum ratings, neither functionality nor long-term reliability can be expected. If a device is returned to conditions within functional operation limits after having been subjected to conditions outside these limits (but within the absolute maximum and minimum ratings) the device may be functional, but with its lifetime degraded depending on exposure to conditions exceeding the functional operation condition limits.Although the processor contains protective circuitry to resist damage from Electro-Static Discharge (ESD), precautions should always be taken to avoid high static voltages or electric fields

Confused · 27 Jan 2012 at 13:47

Thank you ever so much for the copy and paste of information regarding a processor which has been available at retail for a year...

zx128k · 27 Jan 2012 at 13:51

Got an i5 2500k overclocked @ 4.6GHz on air cooling. temp under 70 C all times even in a hot room. Stable prime 95 and IBT.
Vcore = 1.365v
RAM = 1.60 volts.
PLL = 1.8 volts
BCLK = 100
Ratio = 46

zx128k · 27 Jan 2012 at 13:54

"Thank you ever so much for the copy and paste of information regarding a processor which has been available at retail for a year..."

I had a hard job finding it, why not post it for other people new to find?
Please post if it is correct or not?

zx128k · 27 Jan 2012 at 13:59

Need some help at this point, should I going higher on air?

zx128k · 28 Jan 2012 at 09:26

Now I remember why I never posted here.

Plus1 · 28 Jan 2012 at 13:28

No, Don't go higer. Your Vcore is slightlyy higher than average, but not all chips are the same, Some people get away with anything between 1.3 and 1.350.

As for memeory.. Intel specs say that the all components go well with a ram of 1.5 volts. I'm sure 1.6 is okay.

As per Temp.. All goood.

zx128k · 28 Jan 2012 at 16:32

Plus1 thanks m8 will leave it at 4.6GHz.

Plus1 · 28 Jan 2012 at 16:40

It's all good.

zx128k · 31 Jan 2012 at 06:32

vcore = 1.35v
vtt = 1.1v
cpu PLL = 1.8125v seen as 1.806v in bios.
vdram = 1.6v
Current limit = 140%
Load Line Calibration = extreme.
VRM phase control = extreme.
vrm freq. = 350
vrm duty control = extreme.
ratio =46.0
i5 2500k = 4.6Ghz
Passed 10/10 @ max. IBT.

Funny thing is the cpu temp is 10c lower in asus overclocking program than in realtemp or core temp. Temps in the asus program are max 71-72c but are 10c higher in core temp and real temp.

Useful thing I found.

BSOD Codes
0x124 = add/remove vcore or QPI/VTT voltage
0x101 = add more vcore
0x50 = RAM timings/Frequency add DDR3 voltage or add QPI/VTT
0x1E = add more vcore
0x3B = add more vcore
0xD1 = add QPI/VTT voltage
“0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances”
0X109 = add DDR3 voltage
0x0A = add QPI/VTT voltage

zx128k · 31 Jan 2012 at 06:48

Stuck at 4.6GHz. vcore to 1.39v increased to increase the stablity. 60/60 max IBT done everything ok, should I do any more?.

zx128k · 31 Jan 2012 at 22:06

http://valid.canardpc.com/show_oc.php?id=2225940
Got 4.6GHz.

spixelspixel · 31 Jan 2012 at 22:17

those temps would be too close for comfort for me.

zx128k · 31 Jan 2012 at 23:49

Running heaven and aida stability test together temps are much lower. Max temp are 63, 67, 72, 69. 1 hour stable running heaven and aida cpu stability test at the same time. spixelspixel they are much higher in the test and much lower in games.

zx128k · 31 Jan 2012 at 23:55

vcore = 1.39v
vtt = 1.1v
cpu PLL = 1.8125v seen as 1.806v in bios.
vdram = 1.6v
Current limit = 130%
Load Line Calibration = extreme.
VRM phase control = extreme.
vrm freq. = default
spread spectrum = off
vrm duty control = T.Probe.
ratio =46.0
i5 2500k = 4.6Ghz

Seems stable enough, have not done the 24 hour folding at home test. Done 60 passes in IBT and 1 hour in aida cpu stability running with heaven to test everything. No BSOD yet or crashes, 50c cpu temp running just heaven benchmark.

zx128k · 1 Feb 2012 at 02:57

Working with vrm freq. = 500 and trying to lower vcore. Fail at 1.365volts, 1.375v. Anything else I could try?