Core2Duo overclocking report

[Cruelty]

Originally Posted by rx7350

I have some limited experience at overclocking, but I have read many posts on overclock.net that state over and over that the 'safe' max temp should be
55C on a C2D. (...) If it gets too hot then it will start throttling to lower the heat, and that would seriousy degrade your iteration times.

Hmmm, I am running my E6600 @ 3,07GHz and temperature is 62C under full stress - I haven't noticed any throttling, I would expect some above 70-75C or even higher (AFAIR max. temperature for C2D is 85C)...

[rx7350]

Yeah, the definition of 'safe' means different things to different people. I've also read posts (many) that claim to be running 70-75C with no problems. I've seen claims that 85C may be the actual upper thermal limit. At any rate, heat is the enemy, and running cpus at higher temps probably reduces their life. Since most pcs are 'obsolete' in 5-6 years anyway, who cares if running them hot reduces lifespan by 2-3 years. You've got me so fired up right now, I'm going to go push mine further. BURN BABY, BURN!! (SiSoft Sandra).

[rx7350]

Oh, please post full benchmarks after you're finished overclocking in the 'Perpetual Benchmark Thread'. Great way to stare/compare. I just put two in there in the last month - an E6300 (2.767 Ghz) and an E6700 (3.204 Ghz).

[Cruelty]

I'm done overclocking... for now :

• E6600 @ 3066MHz
• QX6700 @ 3000MHz (I have tested it successfully till 3.1GHz, but the temperature have been rising above 75C under full stress, so I have lowered Vcore and FSB slightly).

[garo]

The whole area of CPU temps is rather muddled up. 55C is definitely safe but then it depends on what you are measuring with and what loads you are using. The following link is the best explanation that I have found so far.

http://forumz.tomshardware.com/hardw...ict220066.html

It says that "70 is hot, throttling will start at 80, and CPU will shut down at 85".

I have an Antec P150 (or Antec Solo as it is called without the PSU). I have not found a definitive answer on whether the Tuniq tower will fit.

I am currently running the stock intel hsf with the fan turned to max at all times. I'm at 3000MHz at 1.325V. With two instances of Prime95 running I get a temp of 59C using CoreTemp. When I run TAT load, the temps rise up to 69C. So there is a 10 degree difference in the loads generated by the two. Of course speed fan and the BIOS give me temps that are about 10-15C less at all times.

[rx7350]

Can anyone tell me why I'm not seeing any memory info (freq, FSB:RAM ratio, etc) when using CPU-Z? I get all of the normal cpu info.

[rx7350]

I've been following this thread, decided I would push this E6400 further, and hope ya'll find it useful. Used to run Prime95 exclusively.

CPU: C2D E6400
MOBO: Asus P5B
RAM: Corsair XMS2 1GB DDR2 800 @ 4-4-4-8
PSU: Thermaltake TR2 430W
Video: MSI GeForce 6200TC 128Mb
HD: Western Digital 40Gb SATA
Case: Caseless
CPU COOLER: Zalman 9700
Vcore: 1.3375v
Vdimm: 1.9v
FSB Term V: Auto
PCIe: 100
PCI: locked at 33.33Mhz
Spread Spectrum: disabled


CPU-Z Database (ID : 164459)
Submitted on Sun, 04 Feb 2007 16:46:40 +0100 with CPU-Z 1.38
--------------------------------------------------------------------------------

CPU : Intel Core 2 Duo E6400 (*1)
CPU Arch : 2 Cores - 2 Threads
CPU PSN : Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
CPU EXT : MMX SSE SSE2 SSE3 SSSE3 EM64T
CPU Cache : L1 : 2 x 32/2 x 32 KB - L2 : 2048 KB
Core : Conroe (65 nm) / Revision : B2
CPUID : 6.F.6 / Extended : 6.F
Freq : 3142.35 MHz (392.79 * 8)
----------------------------------
MB Brand : ASUSTeK Computer INC.
MB Model : P5B
NB : Intel P965/G965 rev C1
SB : Intel 82801HB (ICH8) rev 02
----------------------------------
RAM Size : 1024 MB
RAM Freq : 392.8 MHz
RAM Type : DDR2-SDRAM Dual Channel
RAM Ratio : 1:1
RAM Timings : 4-4-4-8
----------------------------------
Slot 1 : 512MB (PC2-6400)
Slot 1 Manufacturer : Corsair
Slot 2 : 512MB (PC2-6400)
Slot 2 Manufacturer : Corsair

http://valid.x86-secret.com/show_oc.php?id=164459


Here's some TaT temps with two 10M exponents running
Ambient air temp 21C

On Demand Clock Modulation [Processor 0] : Chipset: 0-4 Processor: 0-1
On Demand Clock Modulation [Processor 1] : Chipset: 0-4 Processor: 0-1
10:28:49: ** Monitor Started **
10:28:49: No temperature reading
10:28:49: Processor 0 : DIGITAL TMP[ 50°C ]
10:28:49: Processor 1 : DIGITAL TMP[ 47°C ]
Writing to C:\Program Files\Intel Corporation\Thermal Analysis Tool\Results.txt

Idle temps are 41C on core 0, and 37C on core 1

Iteration times with two 10M exponents running are .041sec-.042sec

This is a 1.012Ghz overclock, 47.5% over stock.

One of the most satisfying results was that before I pushed this further from a 2.767Ghz oc, I had the Vcore set to 'Auto' and it was overvolting beyond 1.4v, with temps on both cores of 55C. Running at this overclock of 3.142Ghz with a lower Vcore resulted in lower load temps.


I overclocked this up to 3.4Ghz (425 FSB), and it was WinDoze stable, and torture test stable (blend), but it wasn't Prime95 stable - got rounding errors. Even tried raising Vcore by three steps, but it still wasn't Prime95 stable.
I was able to get it Prime95 stable (48 hours running two 10M exponents) at FSB 393 with one step up in Vcore from stock. It was Prime95 stable at FSB 383 with stock voltage.

Any suggestions on getting it to go further? I've noticed, at least on this system, that each step up in cpu freq translates into less of a drop in iteration times. This thing actually has slightly lower iteration times than an
E6700 I've got oc'ed to 3.204Ghz

[Cruelty]

Right now I think that FSB speed and chipset temperature limit your overclocking, therefore I would experiment with some aftermarket NB cooler, Thermalrigh HR-05 would be my choice then

[rx7350]

I had an issue with no info showing up on the Memory tab when using CPU-Z, but it was was easily resolved by upgrading to version 1.38.

[Grant]

I have also just completed an overclock on an E6600

my system info is below:

Gigabyte 3D Aurora 570
Corsair HX 620W modular PSU
Asus P5W DH Deluxe
Intel E6600 @ 3.3GHz and 1.275 vCore
AC Freezer 7 Pro
Corsair XMS2 2GB DDR2 800 C4
eVGA 8800 GTS
Seagate 7200.10 320 GB (3)
3DMark06 = 8,947


currently running:

cpu at 366 x 9 = 3.3 GHz
vCore at 1.275 which is 'stock' for a E6600
mem at 732
1:1 ratio
mem v at 2.1
mem is set fo C4 timings

Checked stability with Prime 95 in one core and TAT in the other for 11 hours.
cpu tems using TAT were 51/52 after 11 hours

remarkable that this cpu can do a 37% overclock using stock vCore

cannot go higher that cpu 366, system reboots
tried gighervCore up to 1.3v
this did not help

problem must be either mobo v or memory v???

[vaio]

Greetings

Still playing with "my first Intel".
She is an Allendale 6300 with Arctic Cooling Freezer 7 pro/Gigabyte Ds3 running at 390 x 7=2730.
Full dc load temps on both cores usually mid to high 40's with a 15-20c ambient temp.

IIRC vcore in bios set at 1.35 with a cpu-z reading of 1.31.

Could probably get a lil more out of her with some chipset cooling and loosening of timings but pretty content with 2.7 as a starter

May try to find her max before setting her back a notch as weather warms up in spring.