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Asus P5B Concern Regarding Memory

Teraunus

n00b
Joined
Dec 20, 2006
Messages
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Putting this as descriptive as possible... I recently ordered an Intel E8500 3.16Ghz from Newegg with a custom Heatsink and Fan(Thermaltake). I also recently bought some of Crucial's Ballistix Tracer memory (DDR2 800Mhz at 6400 stock).

On my P5B Asus motherboard, with my old processor(E6400 2.13Ghz) I had everything finely set, could mess around with ram timings and make sure that my ram was set correctly timed to what the manufacturer labeled it as.

Once I put in my E8500, the first thing that happened was normal, my Motherboard recognized a new CPU and asked if I wanted to configure it myself or set default values. Of course I didn't want to reset the timings for the ram it had before because it was the same ram and had the same timings, so I just told it to save changes and exit. Upon this action, the computer attempted to reboot, but did not post, causing me to think that the CPU was not working. I unplugged the power and let the motherboard reset itself, allowing me to reconnect to the Bios via the POST page. This time I told it to use default values and it booted fine. I did notice it said "Overclock Failed, Please place settings to default" but I am not interested in overclocking it.

Now that gives and idea of what my past 2 days have been like, but now here is the issue. Before I put the E8500 in my motherboard, my ram could be set to its correct timings and frequency (800Mhz at 6400 with the timing 4-4-4-12) and I had no issue. Now when I have my E8500 in the motherboard, it defaulted(because I told it to so I could get the machine running) to 667Mhz at 5300. I knew this wasn't right and tried to change it, but to my surprise, when I went to up the Mhz frequency to 800, it wasn't 800 anymore. It is now 833Mhz. I currently have it set to 833 at 6700, since I do not want to underclock the ram. Is this fine to do to the ram or am I risking its life-span?

Also, when I go to change the timings to 4-4-4-12, my bios reboots the computer and won't POST. I do the power cord removal and wait and replug to get the POST to return, and I get the same message that says "Overclock Failed!" The settings on the memory now(for the timings) is off of the manufacturer's presets. I tested the computer with World in Conflict today and it ran flawlessly for around 6 hours. Any idea if I am potentially harming my system? If this is fine then I'll live with it, but I usually like having all of my settings to be set correctly to the manufacturer's presets so the life-span of all my goodies is as long as intended.

Pre-thanks for the help :)

[To elaborate on my concern/question (and to prevent you from having to read most of the above paragraph) I'll discuss what my concern for the RAM is.]

Before I put in the E8500, my RAM Frequency options were 533/667/800.
After I put my E8500 in, my RAM Frequency options are 667/833/1033.

When the RAM is set to auto, it defaults to 533. I personally want my ram to run at its potential, so I put it at 833; the RAM itself is DDR2 800Mhz 6400. Is it damaging to the RAM to run it 33Mhz over its stock setting?
 
I have reviewed the BIOS, it is at 1803 which is one step behind the newest one(2011) I went to the Official Intel site to see which reference number the CPU was given and it matched to my current BIOS. As for the RAM voltages, how would that affect the Frequency presets changing?
 
I have a P5B - Deluxe and the latest BIOS is 1226 (non Beta) do you have the regular P5B? Any way your FSB is causing the problems...I am not a CPU guru so I have no idea the FSB speeds of you old and new processor, but I can tell you this...

On P5B mobos they are somewhat restrictive on what you can set your RAM to, in other words it doesnt give you a choice of 1:1, 5:6, etc. It just does the FSB speeds...so on mine if I run a FSB of 1066mhz for stock speeds on my Q6600 I get RAM options of 667 or 833...like you. If I run at 1333 for a 3.0GHZ overclock I once again get RAM options of 667 or 833...if I run at 1600FSB for a 3.6 overclock I get back to "normal" options with 800 being an option.

See this thread...

http://www.hardforum.com/showthread.php?t=1198647

for a much better explanation of all this.

Even more for you I keep my RAM at 2.1V now at that voltage I can run the follwing stable...

1066FSB = 667@4-4-4-12 or 833@5-5-5-15
1333FSB = 667@5-5-5-15
1600FSB = 800@5-5-5-15 barely not stable and havent started tweaking voltages yet...weird thing is I can run prime95 for 2 hrs with no issues and core0 never gets above 150F with all voltages set to auto in the BIOS, but as soon as I load up a game or 3dmark or anything RAM intensive my system almost instantly hard locks...and honestly it might not even be any of that it might that I'm using 4 DIMMS instead of 2. This weekend I plan on taking 2 out and seeing what happens and then start tweaking voltage from there...

Hope all this helps!
 
Yes that clears what the cause is for me. And to the question regarding the motherboard, it is the plain P5B.

I'll give my old and new processor's FSB readings to help.
E6400 2.13GHz - 1066MHz FSB (Old CPU) Normal Motherboard Timings (533/667/800)
E8500 3.16GHz - 1333MHz FSB (New CPU) New Motherboard Timings (667/833/1066)

So setting the frequency over what the RAM is rated is not good correct?
 
Yes that clears what the cause is for me. And to the question regarding the motherboard, it is the plain P5B.

I'll give my old and new processor's FSB readings to help.
E6400 2.13GHz - 1066MHz FSB (Old CPU) Normal Motherboard Timings (533/667/800)
E8500 3.16GHz - 1333MHz FSB (New CPU) New Motherboard Timings (667/833/1066)

So setting the frequency over what the RAM is rated is not good correct?

Honestly it depends on the RAM whether its good or not or rather if it will even work over the designed specs.

You might have to play between 667vs833 and voltage, probably 1.8 vs 2.1 and timing probably 4-4-4-12 vs 5-5-5-15

Good Luck!

You might want to read the first part of that thread I linked to above to undersand your mobo and FSB and RAM stuff a little more. There is a link in that thread to the P5B FAQ over at ASUS' website as well...you might want to read that whole thing too.
 
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