what is holding me back - Page 2

22nd June 2004, 17:41

when i set 1.6 vcore in bios, in windows my voltage is higher (+-1.675, while stressing vcore drops a bit. So your vcore is 1.65 is bios?

And i'm not planning to do a droopmod, it's a waste of time for a bit more performance

Sidney · 22nd June 2004, 17:54

It's all chip dependent;

The following is what I've experienced with Northwood.

1) One 2.4C no matter how high the vcore, it wouldn't go over 3.06 ghz.
2) Second 2.4C 3.24 Ghz 270 FSB @1.70 Volt; 275FSB 1.725 V.
3) 2.6C no matter how high the vcore; 3.32 or 255 FSB.
4) 2.8C no matter how high the vcore 250FSB

None is restricted by memory; it's the nature of the particular processor. The 2A could go 3.34 Ghz at 1.750V.

For p4, you don't want over 1.80 Volt; non temp related, the proc will have a sudden death from over voltage rather than death from heat.

Some lucky guy will get 3.6 Ghz from 2.4C with 1.70 Volt; some wouldn't get over 3 Ghz.

22nd June 2004, 22:24

When is set my FSB to 260 I have to push the vcore to 1.7 in bios, otherwise i receive errors in prime. In windows while prime95 is running it gave me a vcore of +-1.6 and it' s stable.

Is the vcore psu dependant?
BTW 3.3v and 5V are veryy stable, only 12V goes to +-11.75

Sidney · 22nd June 2004, 22:36

Others may have different opinons; here is mine.

Accurate voltage power supply delivers clean power to a mother board that has below specs power delivery = low voltage at the end.

Most boards are under volt. We would only hope the voltage sensor reading is accurate adding another variable.

23rd June 2004, 07:49

Quote:

Originally posted by HardFreak
the best thin to find out whether your PSU is holding u back, is checking the voltages. Maybe upping the VCore will help (but not too high, P4's don't like that).

yep, my opinion too, get a better PSU, had the same problem with my mobile. The chieftec is a nice standard PSU but not when you go to decent oc. and this is a nice oc already.

changed my chieftec 360 to enermax 465 and mobile went stable from 2500 to 26++

duploxxx

23rd June 2004, 11:46

It 's strange because my 3.3v, 12v,5v are very stable. only my vcore drops(0.1) while stressing and that's the reason why i can t oc further.
I''ll try to bench without those fans (vantec tornado needs a lot of power).

23rd June 2004, 12:03

after reading this i know that 's not psu related but it's chip dependant.

23rd June 2004, 13:08

jmke did you do any mods on your p4c800???

jmke · 23rd June 2004, 13:12

nope, it's stock

overclock is Chip and PSU dependant, eliminating the PSU by getting a HQ one will make the job easier

2nd July 2004, 15:48

Which PSU do you suggest?

I've read good things about antec and tagan PSU's

22nd June 2004, 17:54	#12
Sidney Member Join Date: Mar 2004 Posts: 15,738	It's all chip dependent; The following is what I've experienced with Northwood. 1) One 2.4C no matter how high the vcore, it wouldn't go over 3.06 ghz. 2) Second 2.4C 3.24 Ghz 270 FSB @1.70 Volt; 275FSB 1.725 V. 3) 2.6C no matter how high the vcore; 3.32 or 255 FSB. 4) 2.8C no matter how high the vcore 250FSB None is restricted by memory; it's the nature of the particular processor. The 2A could go 3.34 Ghz at 1.750V. For p4, you don't want over 1.80 Volt; non temp related, the proc will have a sudden death from over voltage rather than death from heat. Some lucky guy will get 3.6 Ghz from 2.4C with 1.70 Volt; some wouldn't get over 3 Ghz. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

22nd June 2004, 22:36	#14
Sidney Member Join Date: Mar 2004 Posts: 15,738	Others may have different opinons; here is mine. Accurate voltage power supply delivers clean power to a mother board that has below specs power delivery = low voltage at the end. Most boards are under volt. We would only hope the voltage sensor reading is accurate adding another variable. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

23rd June 2004, 13:12	#19
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,021	nope, it's stock overclock is Chip and PSU dependant, eliminating the PSU by getting a HQ one will make the job easier __________________

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22nd June 2004, 17:41	#11
calimero Posts: n/a	when i set 1.6 vcore in bios, in windows my voltage is higher (+-1.675, while stressing vcore drops a bit. So your vcore is 1.65 is bios? And i'm not planning to do a droopmod, it's a waste of time for a bit more performance

22nd June 2004, 22:24	#13
calimero Posts: n/a	When is set my FSB to 260 I have to push the vcore to 1.7 in bios, otherwise i receive errors in prime. In windows while prime95 is running it gave me a vcore of +-1.6 and it' s stable. Is the vcore psu dependant? BTW 3.3v and 5V are veryy stable, only 12V goes to +-11.75

23rd June 2004, 11:46	#16
calimero Posts: n/a	It 's strange because my 3.3v, 12v,5v are very stable. only my vcore drops(0.1) while stressing and that's the reason why i can t oc further. I''ll try to bench without those fans (vantec tornado needs a lot of power).

23rd June 2004, 12:03	#17
calimero Posts: n/a	after reading this i know that 's not psu related but it's chip dependant.

23rd June 2004, 13:08	#18
calimero Posts: n/a	jmke did you do any mods on your p4c800???

2nd July 2004, 15:48	#20
calimero Posts: n/a	Which PSU do you suggest? I've read good things about antec and tagan PSU's