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Intel K Club & Discussion - Page 17

post #161 of 560
Thread Starter 
Quote:
Originally Posted by SimpleTech View Post
Hey Cory, if you wouldn't mind putting up the latest Real Temp and CPU-Z in the OP since they offer better detection for our processors.

Real Temp: 3.59.3
CPU-Z: 1.54.2

Thanks!
Done, Has RealTemp been updated? When I first got my 875k it would only show 2 cores in Realtemp. Had to use Coretemp.
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post #162 of 560
Quote:
Originally Posted by cory1234 View Post
Done, Has RealTemp been updated? When I first got my 875k it would only show 2 cores in Realtemp. Had to use Coretemp.
Which version were you using? Sometimes you have to delete the program files and just extract the new files from the .zip.

Thanks for posting the two programs in the OP.
post #163 of 560
very nice update, nice work finding those files
post #164 of 560
Hi everybody. Thanks for this thread, very informative. Below is my story with the 875K so far.

I used to have an i7 860 but after reading reviews, forums and considering the ability to customize Turbo ratios, I couldn't resist and bought an 875K. Actually, not just 1 but 3: found them at "attractive" prices and had the money so I wanted to try all 3 and keep the best out of the bunch.

Compared to my 860, my 875K runs a lot cooler at the same frequencies, despite the voltage difference (see my signature for system specifications and cooling equipment):
  • i7 860: Prime95 stable at 4GHz (20 x 200 w/ HT) - VCore: 1.375V - Load temperature: 82°C.
  • i7 875K: Prime95 stable at 4GHz (30 x 133* w/ HT) - VCore: 1.4V - Load temperature: 75°C.
* Same stability and temperatures at 25 x 160, 24 x 166.67 and 20 x 200.

I was pleasantly surprised at the temperature difference. That's what I was hoping for as I always found my 860 to run abnormally hot (tried reseating the waterblock with a thinner layer of Arctic Cooling MX-2, no difference -- but I'm haven't given up on it yet) and it definitely wasn't because of my WC loop given that the temperatures of my HD 5850 in that same loop are excellent (35°C at idle, 40°C under FurMark at 1920x1080 in extreme-burning mode).

The maximum stable frequency of the 875K is disappointing though. I can't get it stable over 4GHz, not even 31 x 133. Tried every combination of BCLK / CPU ratio / Turbo ratios / spread spectrum toggles / overheating protection, went as high as 1.5V of VCore. But it always ends up crashing under Prime95 (Large FFT), even at just 31 x 133 with 1 core active (custom Turbo at +0+0+0+1). However, it did boot into Windows up to 4.4GHz (33 x 133) on all cores.

This first 875K has the following FPO/Batch#: L012B159. I received the other two in the mail yesterday. Both are L012B141, will try one of those this evening or tomorrow evening. Hopefully they will be better chips than this one.
Edited by Roman2K - 7/6/10 at 4:37am
    
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post #165 of 560
@Roman2K

Hi and welcome to OCN

These Lynnfields do tend to run hot and they seems to throttle down at 70C if one not turn of the CPU TM Function.

My 875k hit 70C at around 4,2GHz (HT on) with ram at 1600C7, I need ~1,34v vcore and IMC at ~1,26v, LinX or y-cruncher stress test.

I can reach 4,4GHz (HT on) but then I need ~1,50v vcore, ram at 1600C7, IMC ~1,26v, temp hover ~95C

To bad yours not stable at 4,0GHz, hope those in FPO/Batch#: L012B159 can do better.

I thing I don´t like about these unlocked 875k is that the uncore is fix to the Bclk with two ratios so at Bclk 133 vs Bclk 200 one lose performance due to a low uncore frequency , so in my opinion it´s no real benefit with a unlocked CPU because one need to run high Bclk to get performace but then again those are not extreme edition so one have to live it

BTW: I notice in your sig that you run almost the same gear as I, how you like your MIIIF?
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post #166 of 560
Testing my 875k at 4ghz with 168x24 with vcore 1.248.. Seems stable.. And i know.. I need proof. Coming soon..
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post #167 of 560
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Quote:
Originally Posted by DoctorNick View Post
Testing my 875k at 4ghz with 168x24 with vcore 1.248.. Seems stable.. And i know.. I need proof. Coming soon..
GL, there has to be a few good chips around here. I had had two low volt 4ghz OCs that I thought were going to pass and ended up failing IBT around the 48th-49th run. How much did your board run ya?

@Roman2k: Welcome to OCN. My i7 875k is batch #: L012B141 like your 2 on the way.
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post #168 of 560
[QUOTE=cory1234;9917625]GL, there has to be a few good chips around here. I had had two low volt 4ghz OCs that I thought were going to pass and ended up failing IBT around the 48th-49th run. How much did your board run ya?

IBT falled... But wth.. Just upping the vcore a little, 1.264v right now, with 1.26 vtt for 2000mhz
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post #169 of 560
I'm running mine at 4.026Ghz (183x22) HT on. DRAM at 1100Mhz actual (cas 7).
Voltages:
vCore = 1.3625 (LLC Off) - 1.329v under load.
DRAM = 1.65v
VTT = 1.35v set (1.34v actual)
PLL = 1.8v
PCH = 1.05v

Temps for cores average about 70C. CPU Tcase is 68C. Load temps of course.
On the CPU frequency side, not too impressive. One thing I've had luck with was pushing my DRAM frequency above the 2200Mhz mark. Was able to get them to 2304Mhz. A 52Mhz actual OC isn't too special, but I smiled anyway .
Still working this chip. Hopefully will get something more substantial then 4Ghz.
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post #170 of 560
Quote:
Originally Posted by R00ST3R View Post
I'm running mine at 4.026Ghz (183x22) HT on. DRAM at 1100Mhz actual (cas 7).
Voltages:
vCore = 1.3625 (LLC Off) - 1.329v under load.
DRAM = 1.65v
VTT = 1.35v set (1.34v actual)
PLL = 1.8v
PCH = 1.05v

Temps for cores average about 70C. CPU Tcase is 68C. Load temps of course.
On the CPU frequency side, not too impressive. One thing I've had luck with was pushing my DRAM frequency above the 2200Mhz mark. Was able to get them to 2304Mhz. A 52Mhz actual OC isn't too special, but I smiled anyway .
Still working this chip. Hopefully will get something more substantial then 4Ghz.
Nice OC Rooster Also want a WC loop! Do you think the Apogee XT is a good block?
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