• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

***The Official Wolfdale 8200/8400/8500 Overclocking Thread ***

Hesky82 said:
Your getting Tjunction values mixed up with TjMax limits, TjMax refers to the maximum temperature before throttling begins. With TCC active, the clocks will be modulated by alternately turning the clocks off and on at a duty cycle specific to the processor (typically 30–50%). this is when throttling occurs, usually around 5-10C before TjMax. If PCZ did not see this behaviour, one can assume temp readings are incorrect or TCC is not active and his cpu is on its way to a thermal meltdown.
Click to expand...
My bad Hesky82 :o I've just found the article and you're spot on; had myself a blonde moment there :)

It doesn't help if you're getting Tcase and Tjunction figures mixed up :eek:
 
Gigabyte g33-ds3r

Just posting this to show the capability of this board, not bad for a 70 quid board with onboard graphics, my p5b deluxe maxed out at 480 and p5k deluxe at 490. All chipset voltages are on standard, not sure if its the memory (533 Ballistix) thats holding the board back.


Image1.jpg
 
i can't get my 8400 past 375mhz (x9) on a GA-P35-DS3R board with Crucial Ballistix DDR2 PC2-8500. What voltages are you guys using for the CPU?
When i increase it from 375mhz windows xp will not load just keeps restarting
 
Last edited:
I'm running a E8500 at 4.1Ghz with about 1.38v loaded in windows (cpu-z). You may need to up voltages on your RAM, fsb and northbridge. Could also be your ram timings/divider. What settings have you tried?
 
Most probably your memory is running too high, just drop the memory to lowest speed to take it out of the equation. If your memory was at 1000 to start with at 333FSB when you go to 375 it will be around 1150 plus
 
This is taken from the thread i linked to earlier - "Just finished some very interesting testing tonight with the IR thermometer and I think I've uncovered the core temp mystery with these chips.

Absolute Temperature = TjMax - DTS

The value of TjMax is not publicly documented for any of the Intel desktop processors and there is no magic bit that any software can read to determine this value. That's why whenever a new chip comes out, CoreTemp takes a guess and some times gets it wrong. DTS is the value put out by the on chip digital thermal sensors and shows you how far the chip is from the throttling point.

The programmer of CoreTemp bumped TjMax up to 105C for the E8x00 desktop processors. TjMax=105C is fully documented by Intel for the mobile processors but I don't believe it applies to the desktop 45nm core duo processors. After numerous runs up to the throttling point, I'm convinced that TjMax=95C for the E8x00 desktop series. The maximum Tcase temperature has been bumped by approximately 10C between the early Conroe processors and the E8x00 so it makes sense that TjMax was also bumped from the original 85C to 95C but not to 105C.

The DTS in my E6400 provided very accurate absolute temperature readings based on TjMax=85C over a 35 degree range from 50C to 85C. The same is true for my E8400 but the 35 degree range is now from 60C to 95C. Below that range the actual temperature vs the DTS based temperature diverge by approximately 5C so at a DTS temp of 40C the actual was only about 35C. The E6400 would also diverge by about 5C at very low idle temps but it ended up reporting temps that were too low. I'm not sure if Intel has made a correction for the E8x00 or if the DTS is simply not accurate at low idle temps and has a margin of error of approximately +/- 5C at idle for all core processors.

You can't adjust TjMax using CoreTemp but the latest beta version of SpeedFan 4.34b38 is reading the 8x00 processors. It assumes that TjMax=100C so you have to go into Configure->Advanced and set the Temperature 1&2 offset to -5 and check the "remember it" box for both cores. This sets TjMax=95C. You will finally have some very accurate core temperature readings from 60C to the throttling point at 95C. These sensors were not designed or calibrated for reporting idle temps so some inaccuracy down low should be expected."
 
Wolfdale processor core is 107sq.mm big and consists of 410 million transistors. These numbers give us to understand that Wolfdale has been changed significantly since the times of its predecessor - 65nm Conroe with only 291 million transistors. You can even see it from the photographs of Wolfdale and Conroe cores: the positioning of their functional units has slightly changed.

http://www.xbitlabs.com/articles/cpu/display/intel-wolfdale_2.html
 
wijcc said:
i can't get my 8400 past 375mhz (x9) on a GA-P35-DS3R board with Crucial Ballistix DDR2 PC2-8500. What voltages are you guys using for the CPU?
When i increase it from 375mhz windows xp will not load just keeps restarting
Click to expand...

Eh?? I've got a GA-P35-DS3P along with the e8400 and 4x1gb OCZ PC2-6400 ram. Apart from adjusting FSB voltage for having 4 sticks of ram, I managed to get my e8400 up to 400mhz without any CPU voltage changes.....

3.6ghz dual core from a P4 3.4ghz is enough for me :)
 
You must log in or register to reply here.
Back
Top Bottom