Max OC on my CH-5

[Anarki]

Where I live we've had some pretty cold nights recently , so I thought I would do some OC'ing.

I have 2x256 Hyper-X PC3500 ram. Got it to 242 @ 2-3-2-6 with 3V. This is on a Unmodded NF7-S V2.0

I used clockgen to get it to 251 but XP BSOD'd :(

Is this the norm for CH-5?

[Jupiler]

Guess it is, with just 3.0V. Still not bad at all.
You'll need more voltage to get it higher.(if your board allows it though)

[Slickthellama]

since BH5 can handle 3.6V safely people say, CH5 should be able to handle at least that since it is on a larger process. This is simply speculation but it probably needs more voltage to really shine. But hey 240 2-3-2 is nothing to snuff at. Pretty good for 3.0V imo.

[hatemi]

CH-5 is actually smaler process...

[yotomeczek]

I had 2x256 CH-5 TwinMos and They did 248 6-3-2-2 stable (DC) and 230 6-2-2-2 Vmem 3,20V

[blinky]

yup CH5 is .13u and BH5 is .18u

i dunno how to get the micron symbol

[Techmasta]

CH-5 has been known to die a lot more frequently than BH-5 at the same volts. I wouldn't go past 3.3v with ch-5.

[Anarki]

Thanks Techmasta I will remember not to put more than 3.3V through them :toast:

I dont intend to mod my motherboard just yet, so to have those sticks running as they are is very pleasing for me.

Seeing as I am a nub when it comes to advanced technical stuff, why would the smaller process .13µ mean that they're worse than BH-5 at .18µ ?

Thanks, Anarki.

[lalPOOO]

It doesn't make them worse, in theory is makes them better because less voltage would be required. However in this case things are a bit mixed up. Bh-5's .18u process is what allows them to eat the high volts.

[Techmasta]

As lalPOOO said the lower process means the ram can operate the same speed as a higher process with lower voltage. It should also make the ram cheaper to manufacture.

[elts_drac]

Ok, I know I'm a NooB @ this and I've read a lot of posts here and learned a lot. I finally nutted up and laid out the dough for my system. I couldn't find any BH-5 Winbond memory in my price range so I decided to buy 2 sticks of Buffalo Tech DD4002-512/WC, which according to Buffalo's website is Winbond CH-5, from NEWEGG for $105 a stick. I guess you could say I was having buyers remorse. Do you think this memory will take say 230-240Mhz of FSB reliably with enough vdimm(3.3v)? I will actually USE this system as opposed to just pushing to see what it will take. I know a guy who works for Buffalo that posts over @ AMDMB forums. He says that he hits 250+ with CH-5 all the time @3.3v but does it @ around 2-2-2-11. As you can see in my sig I got a Thermalright ALX-800 w/ a Tornado and a Thermalright NB-1 active Northbridge cooler, as well as sinks for the MOSFETS. The case has 6 34CFM fans, 3 intakes and 3 exhausts, with a side cover intake and a top mounted blowhole. I thought about using a flexible duct kit I found that attaches to an 80mm fan and directing the air on the DIMMS. I hope this setup will keep it pretty cool so i can hit 10.5x240. Does anyone have any other suggestions or comments?

[Alexandrus]

Only one comment. There's no such thing as Maxtor SP1614C 160GB SATA HD ;)

[rookiekiller]

samsung?

[Anarki]

Sorry to sound a nub, but I swear this ram can go higher with the 3V im giving it!

A few questions:

1. I can boot into XP with the ram @ 240, 2-3-2-6. Any higher a nice series of beeps from the BIOS. I can use clockgen to get it to 241-243MHz stable. 243+ = no USB, general crap outs. Any tips? P.S. It doesn't matter what timings I try either.

2. I heard somewhere to get high FSB's you sometimes have to disable APIC?? Can someone elaborate for me please.

3. Why on earth does my BIOS display the wrong FSB when I boot? I set it to 240 in the BIOS, when I boot up it display 478 instead of 480, same goes for any FSB after 200.

Thanks, Anarki.

[ElmnTfrliF]

I believe APIC is only a problem for 261+ fsb (on the infintify anyways.) But I'm not sure if it is the same for others/

[elts_drac]

My humble apologies as the hd in my sig should be Maxtor 160GB 7200RPM SATA Hard Drive, MODEL 6Y160M0. I was looking at the samsung earlier and somehow got the #'s switched.

[Ravilj]

Originally posted by Anarki
2. I heard somewhere to get high FSB's you sometimes have to disable APIC?? Can someone elaborate for me please.
What is APIC exactly, is it AMD specific?

[stestan]

Originally posted by ElmnTfrliF
I believe APIC is only a problem for 261+ fsb (on the infintify anyways.) But I'm not sure if it is the same for others/

I have to disable it when i go over 260fsb aswell using Msi 865pe Neo Fis2r