Re: ATT Paul --->Re: memory experts...

While doing my benchmarking, I must report an interesting
observation...

I bumped up my fsb to 220 (3080) @ 1.575v and ran P95 for almost 2hrs
as well as PCMark2k4, all without incident. During the Prime run, my
cpu temp hovered around 50c. I ran the tests again, but with a lower
cpu voltage and my cpu temp increased a few degree's. This was
verified with PC Probe and speedfan!

As I type this, PCMark has ran successfully ( P95 will run shortly),
but my fsb is @ 225 (3150), votage @ 1.575 and cpu temp is @ 36c idle
and 40c during PCMark! Seems I've found a sweet spot ands it's pretty
darn cool.

All ram setings are stock DDR @3338, (except for the 2.75v), but my
scores are going through the roof! My test chart thus far is proving
beyond a doubt that cas latency plays second fiddle to clock speed or
fsb gains.

It's nice to finally have some good ram to play with and yes, they are
all single sided dimms.
Regards,

ñíñjà¤têç

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On Tue, 27 Sep 2005 05:39:40 GMT, nospam@xxxxxxxxxx (Paul) wrote:

>In article <llihj19qo0qkai9fufv6ienbvbg121qdq8@xxxxxxx>, Fakk2 wrote:
>
>> I received my replacement memory(4x256mb balistix 2226) from crucial
>> and all seems to be running fine now in my P4P800e-deluxe mobo.
>>
>> I've done memtest86 overnight and also been running P95's torture test
>> in the background while doing some basic file work and surfing, boy,
>> the ole' system sure heats up. But all tests are passing...now.
>>
>> So I've been benchmarking with PCMark2k4 and trying to set my optimal
>> settings for system and ram and I was wondering if you do the same and
>> what your bios settings are for memory speed, voltage and timmings.
>> Also, do you manually set these:
>> -Dram idle time (auto)
>> -Dram refresh rate (auto)
>>
>> My settings are as follows:
>> -full manual mode, pat on
>> -fsb @ 210 (northwood 2800 @ 2940) 1.55v
>> -memory @400( 2-2-2-8) 2.75v and Dram burst length @ 4 (not sure about
>> that one either...)
>>
>> It's a bit conservative, but I'm trying lower votages to see what is
>> acceptable and performance hasn't been better with these settings.
>>
>> How high can I go? How high are your settings ? I've also installed a
>> side mount 80mm fan to blow directly over the northbridge and those
>> "hot" Balistix modules...Thanks for any feedback!
>>
>> Regards,
>>
>> ñíñjà¤têç
>>
>
>I'm not really that adventurous :-) FSB and Memory are both
>stock with the Ballistix I've got. I turned Pat on, but that
>is about it. (My lack of overclocking experiments on the
>P4C800-E has a lot to do with having to reenter the BIOS
>settings, if I have an overclocking failure. Takes a lot of
>the fun out of it. Hell, I even lost my BIOS settings one
>day, when I plugged the keyboard and mouse into the wrong
>ports by accident.)
>
>DRAM burst length should have something to do with the cache
>line size. The burst should be large enough to fill a cache
>line. Dual channel is 16 bytes per cycle, so a burst length
>of four totals 64 bytes. Perhaps if a person was running
>single channel, then you set the burst size to 8 to
>get 64 bytes ? If the burst size is too short, then a
>second burst would be required to finish the cache line
>operation, but I don't know what happens if the burst
>is larger than a cache line.
>
>You can play with refresh by extending the time between
>refresh operations, and on some of the private forums,
>they like to push that option. But what that does, is test
>how much better the memory is than its spec, in terms of
>the ability to retain the charge on each DRAM cell. I
>don't really see the profit in playing with refresh myself,
>as the benefit might be a small one. It is possible there
>is a test in memtest86 that will be good at verifying
>retention (fills the memory, then waits a long time
>before verifying it), if you wanted to spend the time
>testing it.
>
>There is some BIOS settings info here:
>http://www.rojakpot.com/freeBOG.aspx
>
>I think I invested more time on the A7N8X-E, because it was
>so picky about RAM. That generation of Intel boards is
>hardly a challenge by comparison, and other than just
>cranking the clocks on it, I don't think it really needs
>a lot of tweaking. Since my processor would only give
>me about 3.5GHz, I don't have a lot of reason to fiddle with
>it. And the box runs warm enough as it is.
>
>With 256MB modules, I guess those are single sided modules ?
>That should allow a higher memory clock, if you wanted to try
>it. Since there is a Ballistix bin for DDR500, they should
>get up fairly close to that. Maybe you could get to 240Mhz
>memory clock (DDR480) with them, but with the CAS set to a
>higher value. (I just checked the Crucial site, and it is
>interesting to see that the PC4000 256MB Ballistix module
>is rated CAS2.5, while the PC4000 512MB module is rated CAS3.
>They would both be using the same part number of chips. I
>think I'd start at a setting of CAS3, as most of the advantage
>of overclocking the memory, is the clock rate. Shaving
>0.5 from CAS really isn't going to help a lot.)
>
>On the private forums, bumping the voltage doesn't seem to
>help Ballistix that much. One guy managed to fry his sticks,
>the first day he got them. They are not tolerant of voltage
>like BH-5 would be.
>
> Paul
.

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