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Need help OCing E4300 and P5B Deluxe

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February 22, 2007 1:45:18 PM

So I've got all this great hardware running at stock right now. OS is loaded and I'm ready to begin OCing. In looking at wusy's guide, one of the first things I need to do is set my mem:FSB ratio to 1:1. On the P5B Deluxe, that would be changing you ram to DDR2-533. The only problem I have is I'm running the E4300 which is a FSB of 200. This would make my ram run at a 4:3 ratio. A 1:1 ratio (in Asus terms) would be DDR2-400, but there is no option for that in BIOS Rev 910. Do I need to flash the dreaded 1004 BIOS? Does anyone have experience OCing the E4300 and the P5B Deluxe? What did you do?

Lastly, since I'm a noob at changing things up in the BIOS, I just wanted to confirm that to get the low latencies of my Supertalent memory, I just need to change vDimm to 2.15 (there is no option for 2.2V) and set the latencies to the manufacturer's specs, correct?

Thanks in advance for your help!

More about : ocing e4300 p5b deluxe

February 22, 2007 2:25:38 PM

Stay away from bios 1004.
This is for 1333 FSB CPU support only.
It does not support roll back to previous revisions (not without a lot of headaches)
The E4300 is an 800 FSB CPU and will not have the same results as other Allendale or Conroe CPU’s
The only way to get your ram to specs is 266 FSB.
That gives you 533, 667 and DDR 800.
This E4300 has been portrayed as some sort of Super CPU and although it is a good one it is not a Conroe.
February 22, 2007 2:45:34 PM

Really? I have heard lots of people having plenty of luck overclocking E4300s.

True, it's not a Conroe, it's an Allendale, but the only difference is it's made with 2MB cache instead of made with 4MB cache with half disabled like the E6300/6400, or with all enabled like the E6600/6700 and X6800.

People say it should be a great overclocking CPU because it has a multiplier of 9 at a default FSB of 200, but is manufactured on the same process as the proven excellent overclockers, the Conroe. In theory, it should have the same overclocking potential as the E6600, which has the same 9 multiplier.

He's not trying to make his RAM run at 533 MHz, he's trying to make his RAM run 1:1. Now, I'm not sure how the P5B deluxe works, but does setting the 533MHz setting mean your RAM will, no matter what the FSB, run 533MHz, or is it just a round-about way of saying 1:1? I suspect the latter. What would happen if you underclocked, say, an E6400, to 200MHz FSB, but left the setting at "533"?



To the OP:

Have you tried changing the RAM speed to 533 in the bios, with everything else at stock, and then seeing what it says in the memory tab of CPU-Z, or in some other memory utility? If it says 200MHz, it's 1:1. If it says 266MHz, it's an absolute 533MHz setting.

And, yeah, that should be all you need to do to set the advertised latencies.
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February 22, 2007 3:03:56 PM

It is a good overclocker but you have to treat this CPU as it is designed.
Getting high OC's from this CPU in comparison to its stock clocks is rewarding but it will not behave like people think it will.
The Super Talent Running 1:1 will need the FSB to come up to 266 on the P5B.
E6600 is 9X also and having the 1066 strap makes it the superior chip to overclock.
In fact the E6300 blows this CPU out of the water because of the 1066 FSB strap even at 7X.
February 22, 2007 3:22:24 PM

So you're saying the board is incapable of running the RAM at any speed lower than 533MHz? What if you popped a Pentium 4 and some DDR2-400 in there?

Also, I thought the straps were related to the chipset, not the CPU. But I don't know a lot about straps.
February 22, 2007 3:27:53 PM

It depends on the CPU support in bios.
The E4300 seems to skip logic 8)
The Straps set the base frequency.
The higher the base the better the bandwidth and this improves your FSB capabilities.
February 22, 2007 3:43:18 PM

Thanks to all those who replied.

Pimecone - I will try as you specified - set it at DDR2-533 and then run CPU-Z and see what it says. If I'm at 4:3 ratio, then perhaps Asus can provide some help. Asus makes this confusing, IMHO - I don't know why they don't just let you change the ratio itself rather than labeling/dumbifying it (if in fact that is what they are doing). You are correct in that my goal here is not to make my ram run at 533, but to get the 1:1 ratio and then OC my FSB (hopefully to ~350MHz).
February 22, 2007 10:55:59 PM

Figured it out. I changed the Memory to DDR2-533 and changed the FSB to 266. CPU-Z reports a 1:1 FSB to Mem Ratio.

On another note (And I'm sure this has been posted elsewhere), why does CPU-Z show my CPU multiplier toggling from 6 to 9 when I have speedstep turned off?
February 22, 2007 11:04:46 PM

But what happened when you had the FSB at 200MHz and the RAM set to 533MHz?
February 22, 2007 11:56:24 PM

It reported 4:3 ratio
!