Dominator 8500 won't overclock OR underclock?!

Flareon

Flareon

Flareon

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Joined
2 Dec 2003
Posts
400
Location
High Wycombe, UK
GA-965P-DS4
Q6600
4GB Corsair Dominator PC8500 (2x2048)

Just built this rig. The board is an old one but the rest is new.

In short, if I try to set the memory clock to anything but 1067mhz, it won't POST. Just sits there and powers on/off repeatedly til I reset it in the standard DS4/DS3 fashion.

***

Some details:
I've set up everything previously before actually doing any clocking. By this I mean:
Setting Vcore to 1.43125v
Setting DRAM to 2.1v
Setting PCI-E clock to 100mhz
Taking the FSB clock to manual, but setting it to the stock of 266
Leaving the RAM timings as per SPD.

This all works fine.


I then try to do any of the following:
Up the FSB to 267mhz, or anything above.
Change the RAM multiplier to anything other than the 4x default setting, notably 3.33x which gives a clock of 888mhz or so which is well below the rated speed of 1066.

This results in the aforementioned start/restart cycle which only stops when I reset it manually, at which point it of course reverts to defaults.

***

The system works fine on all standard settings. As mentioned, the board is a re-used one which I've had working fine in the past with an E6400 and 4x512mb GEIL dimms.
BIOS is F7
Temps are very low as this was designed to be a seriously clocking system - currently 22C CPU temp as reported by coretemp. The RAM is sitting on 35C as reported by a sensor that's stuck to it.




Any thoughts please?
 
Flareon said:
Some details:
I've set up everything previously before actually doing any clocking. By this I mean:
Setting Vcore to 1.43125v
Taking the FSB clock to manual, but setting it to the stock of 266
Click to expand...

typo? :eek:
 
I've heard some boards using "Auto" CPU vcore are a bit generous with the voltage sometimes. In that case, 1.4v doesnt seem unlikely.
 
Erk I guess I missed some posts.

Yep I meant 1.43125. That's a manual BIOS setting not a core temp or a probe, not sure what it's actually gonna be.
I used to run the old E6400 at about that or sometimes higher...
Although I don't have the machine in front of me, I believe it said the default was 1.375.
And it is indeed running at stock. I don't -need- to use a higher voltage to get it to work without an OC, but there's also no harm in it apart from slightly higher temps. Just did it first to prove that changing the DDR clock was the prob :D

Switching the RAM about is on my list of things to try along with updating the bios to F11 :)
 
download coretemp, open it and that will tell you your vid set this in the bios

open cpuz and see what it tells you the vcore is, it might be lower so up the vcore in the bios till cpuz reports the same voltage as you vid, now start upping the fsb till it becomes unstable then up the volatge abit more, having such a high voltage for stock settings will just create excess and unnesasary heat

keep your ratio on auto

I thinking its more the board thats the problem than the ram
 
Well of course usually I would work that way, I was simply proving that upping the vcore wasn't causing the POST failure. Considering with the upped vcore it's still running at about 28C under load I'm not exactly concerned about that either!

Like I said earlier, the board has been clocked fine in the past.

Anyway I need to try a load of stuff.
 
Flareon said:
Well of course usually I would work that way, I was simply proving that upping the vcore wasn't causing the POST failure. Considering with the upped vcore it's still running at about 28C under load I'm not exactly concerned about that either!

Like I said earlier, the board has been clocked fine in the past.

Anyway I need to try a load of stuff.
Click to expand...

i see, do you have any other ram to try in the board?
 
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