Updated your list. 4GHz on it,what is the FSB and DRAM ratio you have? 5:4 ratio ?Full load temperature with your new heatsink?

Thanks bro. FSB at 1066mhz, ram at 177mhz CL2.5 - cause my rams are just generic stuff. Temps even with the new cooler are low 70s during intelburn test. My test room is not air con'ed- ambient temps are high- so that's a big minus point. The whole case gets blazing hot until even the panels feel like the side of an oven. You can actually start sweating sitting around this system. Stability is of course best early in the morning

Stability tests completed at 4ghz- intel burn test 10 loops maximum stress, superpi 32m, unigine cathedral, prime 95 2 hrs and 1/2 hr of NFS:MW. No 24 hr prime test- I just don't believe in 24 hr priming anymore, the stress it places on system components is lethal and I prefer more real world tests. High power draw of the prescotts at 4ghz will burn out mosfets eventually.

Now that I've hit 4ghz, I'm gonna lower it to something "sane" for 24/7 use - maybe 3.6ghz . I kinda like my retro P4 so I want it to last just a bit longer.

4GHz stable at all the stress test you applied. 3.6GHz is somehow good enough for daily use. I'm with 3.6GHz for daily use too!

Long time no drop by this thread. Seems is till very active.

@SGT76
Maybe you can include all the parameter such as ram timing, voltage etc. Just my suggestions.
Running at 4GHz is superb, but too much of heat generated is another issue. A 3.6GHz would be sweet enough to run daily works.


@raymond
Bro, perhaps is time for you to go further than 3.6GHz.

It has been a while since a P4 user uploaded his 4Ghz clocks

Running at 4ghz is scary- the system feels like it's on a thin edge. The air exhausted out the back fan and psu is like a building exhaust vent. Case side panels hot. Northbridge heatsink WILL burn fingers real fast, vcore fluctuates due to droop.

Parameters are:
ram timings: 2.5-3-3-7 @ 177mhz dual channel
voltage set in bios to 1.385v, but due to vdroop it fluctuates wildly. Setting it higher than this pushes temps way too high.
pci/agp/sata all locked at 33/66/100
super patch and all auto enhancements off

hardware is:
Processor: Prescott 3.0 E0 stepping
Motherboard: DFI 865PE-AL
Ram: 1 stick Kingmax 512mb DDR400 and 1 stick Kingston 512mb DDR333 (either it shows how ghetto my rig is or that you don't need high performance rams) <-- anyway I'm looking for a set of better rams
CPU cooler: Coolermaster Hyper N620, with modified Deepcool s478 mounting, 2 x12CM fans
Thermal past: Zalman
Graphics: Nvidia 6800GS, Palit oc'ed version, further pushed to 470/1300--> faster than a 6800 Ultra
Hard disk: 2 x 40gb (1 maxtor, 1 Hitachi)
Optical drive: Sony CD/ DVD combo
Floppy: Sony 1.44"
Sound card: SB Live ! CT4830 with EMU chip (on-board sound doesn't like oc- becomes flaky)
Case: Coolermaster Elite, forgot which model- 3 x 12cm CM fans
PSU: Tagan 480w
Others: CM Musketeer with bling bling meter

Future plans: get some better rams - Kingston Hyper-X or similar, more modern video card- Radeon 2600, 4650 or 3850, add more fans - maybe 2 in the rear in sequence to extract hot air faster, heatsinks on mosfets, southbridge, ram cooler.

This post has been edited by SGT76: Dec 20 2010, 03:52 PM

My Northwood is hardly to get stable at 3.7GHz with 1:1 ratio with 4 sticks of RAM. Best case is to run on 226MHz or 227MHz on fsb.

shinjite,is your P4 ES still on service?

Your Prescott is very much better in terms of pushing to high frequency compare to Northwood core. 90nm vs. 130nm architecture.

My ES still running at stock clocks 3Ghz haha

SGT76: Your setup is running on 3:2

This post has been edited by shinjite: Dec 20 2010, 05:00 PM

3.6ghz on Northwood is very impressive. Before this I was using 2.8b, max stable oc only 3.36ghz. Clock-4-clock, Northie is 10% faster than presscott I think, so your 3.6ghz should be about a 4ghz pressie.

Ya, ya 3:2... my matematik very phail one thanks!

Mine is C version, C version is having a better overclocking than A & B version. I don't think Northwood is performing better in clock to clock performance,it should be the same as they are from P4 family.

C Northie is the best P4 bro. Northwood only 21 stage pipeline, prescott is 30 stage. Make many many extra rounds in the silicon, then only the superpi come out.

Very inspired lah joining this thread. I think today I go back I'm gonna tweak my system some more and try to get that 4ghz 24/7 stable.

This post has been edited by SGT76: Dec 20 2010, 06:17 PM

Prescott has a longer pipeline compared to the Northwoods
So clock per clock at stock, the Northwood is able to beat the Prescott

But due to smaller dye for the Prescott, it can scale higher than Northwood in terms of overclocking to compensate on the longer pipelines

4GHz fro daily use, . I think it would be amazing if you are able to run at 4GHz all the time. Hmm..pipeline stages..

bro shinjite,you agree that Northwood core beats Prescott in clock to clock performance? I think that kind of perfomance is not significant.

Clock to clock it definitely beats the Prescott in stock form, that is a fact after all but not when the Prescott is overclocked
With the help of a larger 1MB cache couple up with high overclocking ability (0.09 micron), the longer 31 stages of pipelines is easily being compensated

About significance....for a P4, a 400Mhz bump in clockspeed, the gain is so negligible that one can say it is close to non-existence (which for me is true, just nice to see high clockspeeds )

This post has been edited by shinjite: Dec 21 2010, 01:20 AM

400MHz boost in clockspeed for P4 today is negligible almost but i believe it still does help a little in term of speed/performance. You're right, it's nice to see high clock speed.

It does help in speed/performance in applications, just that it is negligible even though with HT on. However in Windows, it is close to non-existence. If it is snappy, it will be snappy.

No choice for me now but try to boost the proc at higher clocks for daily use only. I know the comment from you meant as the newer technology cual core or better has actually boost miles of performance in apllications and speed.

Can't do much for our golden Netburst Architecture

Benchmarks at 4ghz

Intelburn 10 loops at max- stable



3dmark06 - 3383 marks



superpi 1m- 37.437s



cpu queen- beats athlon 64 3200, pentium d820 and P4 3.73 EE



cpu aes- beats sempron 140, pentium d820 and P4 3.73 EE



cpuhash- beats core duo T2500, athlon 64 3200 and P4 3.73 EE



cpuzlib- beats sempron 140, athlon 64 3200 and P4 3.73 EE



fpujulia- beats core duo T2500, P4 3.73 EE and athlon 64 X2 4000!



fpumandel- beats core duo T2500, P4 3.73 EE and athlon 64 3200



fpusinjulia- beats sempron 140, pentium d820 and P4 3.73 EE



fpuvp8- beats athlon 64 3200 and P4 3.73 EE



This post has been edited by SGT76: Dec 21 2010, 11:01 PM

the Gflops in intelburntest for the P4 is 4Gflops from the screenshot. My X3220 oc'ed to 3.3Ghz is 44Gflops...