ASUS P5N-E SLI 650i Thread

[dpawl31]

Yep you are wrong. lol
The bios shows actual values. Lets look at my rig.

My CPU is rated @ 800Mhz FSB. I am currently at 1000 in bios.
Intel CPUs are quad pumped- meaning my FSB is actually 250x4. (1000)
The multiplier is what calculates your core frequency. Mine is 14.
14 times 250 is 3500, or 3.5Ghz.
Your RAM on the other hand, yes it is rated @ 800. That is not really right though, because it is DDR memory, otherwise known as DUAL data rate.
So you Ram in BIOS shows 800, while your FSB is showing 1660.

If you check CPUZ your Ram is running @ 400Mhz, not 800.
Your TRUE FSB is 415 (quad pumped to 1660)
Your RAM, to run it @ 1:1 only needs to be set to 830, a slight overclock.
This is because your RAM is Dual data rate. Your RAM will really be @ 415Mhz times two, and your FSB will be 415Mhz times FOUR.

So, 415:415 gives you 1:1. I hope this made sense, if not, keep asking questions!

I knew NOTHING about RAM a month ago. I am just gettin' the hang of it.
Also- keep those timings @ 5. You'll need it looser to maintain stability with your RAM OC'd. You may be able to tighten them after.
Also keep in mind you may need to up your RAM voltage to keep it stable @ 415Mhz, but I doubt it. You are already at 2.2v on them anyway, and it is a very minor OC. DDR2-800 can go beyond DDR-1000 speeds if you have good ram.

PS- I am running a 5:8 divider so don't go by my rigs setup lol.
The 5:8 is letting me run the RAM @ stock speeds and gives me a slight performance boost.

[carey8]

Thanks Buddy. That acctually helps alot. I understand how it works now.

[exnihilo]

Im stuck @ 2.2 Ghz on my e4300/P5N-E.

I have my mem (800) set to FSB 333 (667) @ 4 4 4 12
my CPU FSB is @ 250 (1000) with a multi of 9.

It tried getting to 2.4 with 3:2 ratio (mem @ 400 [CPU FSB @ 300]) which it's rated for, even dropped my timings to 5 5 5 15, with no luck, wouldn't post. I'm still on stock voltages, but for that kind of OC I didn't think i'd have to mess with those. Any ideas?

cg

[dpawl31]

Little hint: 1:1 is best for stability on Intels.
You should link it together so that you constantly have a 1:1.
With your FSB @ 300, your RAM will be 300, DDR2-600
Also- check the specs on your RAM for their stock voltage and manually set that. Also manually set the timings to stock.

Your increments for upping the FSB should not be so drastic. Go, say 5Mhz @ a time. (ie 250 to 255) When you fail to get into windows, go back and bump your voltage up a tad. Try again, if not, bump again and retry. KEEP AN EYE ON YOUR TEMPS.

[dpawl31]

Thanks Buddy. That acctually helps alot. I understand how it works now.

Glad I could help. Keep us posted! (no pun intended!)

[exnihilo]

Yeah, but running my ram @ 600 is kind of defeating the purpose of OC'ing my proc isn't it? I will however take your advice and go in smaller incredments. I'll find a happy medium somewhere . Thanks.

cg

[Perry]

I completely blame dpawl31 for getting me into this.

From the reviews I've read, it seems like the northbridge and southbridge chipsets can get quite warm on this board. I haven't been able to find anything definitive from my Google searches but could you mount Thermaltake Extreme Spirit II on the northbridge and southbridge to keep things chilly or is aftermarket cooling even needed?

[dpawl31]

I completely blame dpawl31 for getting me into this.

HAH!
I like you. lol.

Anyway, I have the stock board... @ 3.5Ghz on a 2.8.
But I do want to get some better cooling.
BTW dont worry about the memory thing, I have had no issues and it seems the new bios fixed it.
So yeah, GET IT MAN! lol

Lots of options for cooling NB/SB but it really is up to what cooler you get for the CPU, to fit it correctly. Check back a couple pages and look at the two I picked out

Welcome to the thread Perry! Can't wait to see you 805 on a P5N-E!

[Perry]

I'm curious to see what this thing can do if I put it on a board that allows for voltage increase. At the absolute worse I'll fry it, move on to an E6300 ver. 2 (with the 4MB L2 cache) and sleep on the couch for a few days when my fiance gets mad at me.

[dpawl31]

lmao...
How sure are you about getting the board?
I feel you on the fiance thing... we're getting married in October.
Just spent $500ish of wedding money on my new rig, LOL whoops.
She's over it tho- cuz it was from my stocks. haha.