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Help Need - Asus P5B/D-805/Corsair1Gb_DDR2-4300C3

Poll Results: Do we need newer DDR2 OC'ing guides for n00b's?

This is a multiple choice poll
  • 33% of voters (2)
    Yes, DDR2 is now the norm.
  • 16% of voters (1)
    No, DDR2 isn't established enough.
  • 16% of voters (1)
    No, any half wit can glean the info off google
  • 16% of voters (1)
    Yes, it's to hard to find upto date guides on DDR2's relationship to successful OC'ing
  • 16% of voters (1)
    Yes, especially on Intel locked FSB CPU's, as this allows this limiting option to be got over.
6 Total Votes  
post #1 of 4
Thread Starter 
Hi Guyz'n'Galz

I'm a n00b & I can't get 166mhz stable on the above kit. I've removed & purified with Artic Silver 5 which has reduce temps by 8
degrees c, updated to lastest bios 0701.

How do I get this Pentium D 805 stable above stock 133mhz?

1. I first increased to 166mhz, wndow boots fine, Prime95 restarts my PC after an hour though. I then increased CPU vCore up from stock 1.3120V to 1.3125v only to get a BSOD on next restart.

2. So at 166mhz left CPU vCore at stock voltage & increase ram from 553mhz to 664mhz but got no windows [ram LED's stayed on red!]?

Where do I go from here?I've read tens of OC'ing articles including NoAffinity's OC'ing guide & Toms hardware's D 805 but until you've gain experience you feel unsure. This my 1st intel for 10yrs.

According to NoAffinity's guide I could loosen RAM timings. But where do I get the four sets of data from to go tighter or looser? Isn't there a maths equation or table I can refer to for my specific ram for CAS etc? Foolishly I bought the ram on it's best CAS 3 & best price for ddr2 4300. It was the only ram with CAS 3-3-3-8 so I bought them, was this a poor chose?

I'm sure therer are other P5B + D 805 [considered good for OC'ing] OC'ers out there, please get in touch

Thankz optical10 http://www.overclock.net/images/smilies/smile.gif

I posted a poll with this thread for more upto date OC'ing guides for intel, but more importantly newer DDR2 guides on the effects DDR2 has on OC'ing [data input resources] which is were I feel lost?
post #2 of 4
It sounds likely that your RAM might be the reason for the errors.

First, is that Value RAM or XMS from Corsair?

Second, there is no need to increase the speed of the RAM, it is already much faster than the CPU. If you managed to get to 166FSB, you would want your RAM at 332MHZ, roughly, 340MHZ would be fine depending on the settings avaialble.

My guess is that you cranked the RAM speed higher than stock, with the stock low timings and no additional voltage and that's your trouble.


I also recomend you make smaller FSB adjustments, jumping 30Mhz in one change is not always a good idea.

Enter your BIOS and reload all default settings.

Then, set your RAM to 340Mhz or as close as the BIOS will let you set it (some BIOS have only certain options).

Then set your FSB to 140 and boot into windows....test with Prime....once it passes at least 8 hours (12 is better), increase the FSB to 145, boot, retest....ect, ect.....once you hit 166 FSB you can then manually increase the RAM speed.......you should never have to go over the stock rated speed of the RAM with that CPU......as the RAm, at stock 533 speeds would be 1:1 with a CPU at 266FSB.....which you will never get out of that 805


Welcome to the forums

Also, be good idea to fill outt he System Specs in your USER CP in your profile......that way your system is displayed with every post.
post #3 of 4
Thread Starter 
Right, first of all as so little users voted on the poll [thanks for those who did] I’m going to move it to a main thread as I feel it was lost in my topic / thread title.

Now [Thumper] a lot has happened in the four weeks since I started this thread.

1.I was able to get too 180mhz, Air Cooled, with a vCore up from 1,49v up to 1.5125v. The Ram also upped to 2.000v. Windows booted but Prime95 wouldn’t complete over 12 hours. So as I had saved money by buying the D 805 CPU & the toms hardware review rig also needed it at this stage \\i purchased a Water-cooling kit to help on the high temps [63c idle/ 76c load]. I was expecting these temps as the review pointed out, plus the desktop case wasn’t as efficient as a tower case.

2.Now with W/C my temps at 180mhz are 51c idle / 54c load. I moved up in 1mhz increments with success in booting into widows until I hit 184mhz which didn’t boot. vCore was 1.5250 & ram 2.000v. As this CPU has the multiplier locked at x 20, this gave me 3.66ghz.

3.This brings me to today’s post. As 3.66ghz wasn’t stable I went back to 3.60ghz [719 fsb] with a 12 hour Prime95 completed. Not bad on a Intel 965 chipset mobo @ £85 that’s not as good as the higher 975 chipset £150 that were used in the Toms Hardware review.

4.My next question is my ram the bottleneck to squeezing more out of this rig? The TH review got to 4.1 GHz with W/C but that was with a 8 phase capacitor mobo & 1066 ram, but I was hoping for 3.80ghz or even 3.90ghz as this mobo is rated for OC’ing.

5.So as I emailed Corsair weeks ago and got no answer I thought you guys could help. Here’s my email to Corsair “Can you tell me if this ram is the bottleneck? Do I double up to 2GB or do I go for the RAM Configurator recommend for my mobo of TWIN2X2048-6400C4?
Please bear in mind this ram has to upgrade to a future proof Core 2 Duo 6800 extreme & nVidia Intel 590/680 SLi mobo next year. With this in mind could I go for Corsair DDR2 1066 as toms hardware recommends or will my current mobo not take it [my mobo is rated at 800 ddr2]?

Also what’s better, 2GB DDR2 1000, 4GB DDR2 800/667 or 8GB of DDR2 533? Obviously I mean all above choices at the best CAS Latency in their class. Can I go down in CAS latency & go up in ram speed to achieve the same or better results? “

Once again thanks in advance and I promise to reply sooner.
post #4 of 4
76C LOAD!! Don't you just love the smell of fried silicon?

That's pretty toasty..
    
CPUMotherboardGraphicsRAM
E6750 @ 3.1GHz ASus P5K-E XFX HD5750 2x2GB Team Elite PC6400 + 2x2GB G.Skill Pi Series. 
Hard DriveOSMonitorKeyboard
500GB 7200.10 + 160gb WD Windows Vista x64 SP1 Dell SP23" something W. Saitek USB 
PowerCaseMouseMouse Pad
750W Something or other. Beige ATX Mid Case Belkin GLOWY Optical None 
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CPUMotherboardGraphicsRAM
E6750 @ 3.1GHz ASus P5K-E XFX HD5750 2x2GB Team Elite PC6400 + 2x2GB G.Skill Pi Series. 
Hard DriveOSMonitorKeyboard
500GB 7200.10 + 160gb WD Windows Vista x64 SP1 Dell SP23" something W. Saitek USB 
PowerCaseMouseMouse Pad
750W Something or other. Beige ATX Mid Case Belkin GLOWY Optical None 
  hide details  
Reply
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