CAS? Spread Spectrum? Latentcy? Mysterious BIOS settings?

[flounder43]

Need to know what all of those settings in your BIOS mean? If so, look here (http://www.rojakpot.com/freebog.aspx).


*edited, as a back-up, here is an older version of the Guide, in PDF format:
http://homepage.mac.com/timrutter/BOG_PDF_6.2.zip

**edit, changed the link to reflect change in address to the free version of the guide.

[Jon]

I want to make this a sticky a while if you don't mind.

As many of these questions I see, it's deserving.

[Maximus Nickus]

Well deserved Flounder, congrats on the Blue stars to.

Nick

[Vovan]

Thanks a lot, Flounder!
Really good info!;)

[Holst]

Thanks allot folunder.

I used to have that page in my favorites but a overclocking accident made me frinstall.

And congrats on the blue stars..well deserved from the little ive seen whyle reading the forum.

[killem1x1]

This is a definate must have. Thanks Flounder, I had lost the link. I have a printed copy from last year, but definately needed the updated version;)

[Madradog]

I have always been curious about some of the memory settings in my bios('s). I guess they keep trying to hide the information. I am not trying to ask you to go a-hunting for the new link, but it is a sticky post, and I guess it is staying at the top of the list. I see that 577 people have been to it. So, more might come, I figure. I guess, if you know where the link is, you could update the post. If not, no biggie. Thanks.

[CMangano]

I have asked about this on 2 different occasions on this board, thanks for the link!

[T20]

Holy crap, lol, I finally found out what 'Bios Video Shadowing' is. That thing bugged me for eons.

Flounder thanx a lot man ;)

[Sorondil]

Thank you Flounder for the link to the good info. :)

[walaka7]

thanks flounder.. you da man!

[Samzik]

yipie the revision 7 is out there thanx ppz we need theze cinda revisions cos rookies ask so many dumb questions (like me ) that they get triked all the time.

(for example some guy asked why hes modem lights turn on of all the time and was afraid been hacked,damn how dumb one can be hes surfing talking with ppz on mirc and thinks net activity hacking, damn, so the guyz pulled off a moronic trick they saed him to push cntr alt del 2 times, damn, and so he did 3 times, and then he was like .... amm why my comp restarts :D doh and then there is more funn they told him to del a tree on c:\ to keep the hakcers away.no futher infomation about that guy :) )

So dont be fuled be cearfoul what u read !

But i hear ocs is good ram 333 mhz one (pc2700) wil go to 195 mhz stable so im thinking of buying that and abits kr7 raid for the top of 200mhz ram bandwith as i hear :).

[LiquidConfusion]

Great page!! with it ive been able to get a few more Mhz on my fsb It really helped this BIOS setting idiot..:D have a :beer: on me for that one

[NODES]

thx for that great info...

[Darkpie]

Thank you Flonder No I can look up thoes Strange BIOS settings if i every feal the need to. You are DA MAN Thank you once agin.

You are a Great help to Newbes.

[tuzzi]

Hey Flounder,

As a newbe to this forum, and someone who is building their first rig thanks a million. I'm feeling more confident my rig going to turn out a-ok. This info is going to most helpful. Thanks again.:beer:

[Cown]

Flounder u rock :clap:

[flounder43]

When I first posted this, I knew it would be helpful, but I cannot thank all of you enough for your kind comments! I hope that we can all find links like this one and share with each other here.

I personally would like to thank the author of this guide for producing a fantastic, comprehensive guide that is so useful to so many.

[Henry Rollins II]

Well here is another one :)

This is great. I like it.

regards,
Henry the man

[Army_Of_1]

Thanks for the link... I knew a little about CAS settings, but just didn't have a complete grasp on it and that helped me out :) TY

[beezee]

good stuff

[M@€$†®Ö™]

Originally posted by Samzik
yipie the revision 7 is out there thanx ppz we need theze cinda revisions cos rookies ask so many dumb questions (like me ) that they get triked all the time.

(for example some guy asked why hes modem lights turn on of all the time and was afraid been hacked,damn how dumb one can be hes surfing talking with ppz on mirc and thinks net activity hacking, damn, so the guyz pulled off a moronic trick they saed him to push cntr alt del 2 times, damn, and so he did 3 times, and then he was like .... amm why my comp restarts :D doh and then there is more funn they told him to del a tree on c:\ to keep the hakcers away.no futher infomation about that guy :) )

So dont be fuled be cearfoul what u read !

But i hear ocs is good ram 333 mhz one (pc2700) wil go to 195 mhz stable so im thinking of buying that and abits kr7 raid for the top of 200mhz ram bandwith as i hear :).

Where did you find revision 7 ?

Maestro

[DreamingWolf]

Hey Flounder,
Thanks, but you took away all the fun I was going to have wandering the threads picking up random bits of wisdom as I searched for the answer to my question.:D

You da man! Or should that be you da fish:rolleyes:

Thanks again:cool:

[PhobMX]

i guess that theres something wrong, the link doesnt work anymore...

[flounder43]

Here is an updated link: The Definitive BIOS Optimization Guide, Rev. 6.5 (http://www.rojakpot.com/Speed_Demonz/BIOS_Guide/BIOS_Guide_Index.htm).

Also, for the interim release of Rev. 7 of Adrian Wong's Guide, look here (http://www.rojakpot.com/Speed_Demonz/New_BIOS_Guide/Index.htm).

Link at the top also edited.

[theendisgone]

Top Stuff

[ZeroKelvin]

Got a question....My corsair cas2 ram says that if I only use one stick of ram I am able to use cas2. If I use more than one stick of ram I must use 2.5cas. My question is.....if I am using two sticks am I still able to set the bios at cas2? Does the computer still see cas2.5 even if I set it to 2?

[R3V3L4710N]

Thanks a lot for the great link Flounder!

:D Top Stuff!

[Lithan]

I think I've asked this 3 or 4 times on the board. And probably been answered too... but Im so forgetful I likely dont check back. Thanks Ariel's fat little friend. Im an adult male who can probably still sing every song from disneys the little mermaid. Kill me... please.

[bubba gump]

I think the link is dead flounder :(.


I dont know what CAS Latency numbers mean so i wanted to know, came to this thread and the link dont work im pretty sure :(

[sigee]

This thread has help me more than any other so far...THANX

[I.M.O.G.]

if this wasn't a g-rated forum and i wasn't a heterosexual, i might offer you some sort of sexual gratification this link is so good... haha nice work.

[flounder43]

Looks like the guide is back, new and improved!
http://www.rojakpot.com/

[bassbeatz]

well after an hour on the link i sorted the bios out and it has cured a few probs and has made system more responsive,had a total of 6 adjustments to make.thanx for the link.

anyone else do yourself a favour a visit this site:D :cool:

[bassbeatz]

what a site,spent an hour reading and resetting bios to link settings,total of 6 adjustments made.system i must say has responded with definate increase on drive access and more responsive to folder openings....................a must visit for every one..............thanx flounder

[HoldenCaulfield]

For a newbie like myself this guide is more help then you could imagine. Thank You Flounder and Thank You very much to the author of this guide(I didn't look to see if then name is on ther).

[c0nfusion]

Thanks.

[KewlKid2000+]

i think i may be computer illiterate (im completely lost on this guide) if someone can help me get the most out of my Kingston 2.5 Cas pc-2100 ddr please tell me what to set it to < i only have 1 gig > please pm me thanx

[Cloot]

Wow just the thing I was lookin' for that's pretty comprehensive bios info

[cV]

Some of the stuff in there is not true though.. like about the BIOS caching and VRAM caching. Set BIOS caching on -- it'll be clear once the system boots anyway.

That's courtesy Peter Missel

[gruvin2]

Damn this link is Sweeet. Flounder saved us all many hours of searching the net to find this info. This link is a Must read!

[Mithrandir]

Thanks very informative

[IZON]

just what the doctor ordered

[Mark Larson]

http://arstechnica.com/paedia/b/bandwidth-latency/bandwidth-latency-1.html

http://arstechnica.com/guide/building/bios/bios-1.html

[JasonBr]

Sweet,

Nice work

[black jesus]

whoa, i have a new jesus

[knownotin]

flounder man u are da sh*t. That guide was awesome, i had no idea how to overclock memory, and now i do.

Thanks for the link flounder

[TeLoS]

Great link.. nice one dude :D

[TheGr8s1]

knowledge is power and u must made me king. thx

[Vertig0]

Lots of good info there! Thanks!

[altec]

Awesome link Flounder! Thanks a lot for the informative guide. I have myself asked the question about latency and timings twice, and I never checked back...so thanks for the information! You are the man!
;)

[AceGoober]

Great guide to have access to! Details information that is normally not found in any of the motherboard manuals. Would recommend it to anyone who does not understand what the settings mean and what they will do.

[Gage8]

so from reading that guide i'm still not sure about the AGP Aperture Size. It says that it is better to keep it at 64MB but if you have to you can go to 128MB. But it didn't really give a reason why (that i caught at least).

My friend says i should keep it at 128MB. I have a 64MB Gforce4 w/ 512MB of ram.

[/\\/3|2o]

1337. Iv learned a lot from that link.

[krzy]

So much information. Thanks for passing on the knowledge

[hitechjb1]

These are a number of posts about various aspects of memory and dual channel in a sticky in the memory section, posted during Feb - April 03. That sticky and the links are no longer there, ...

I found some copies of them and repost here. Any question or comments are welcome.


Memory

RAS, CAS Timing and BIOS Memory Setting (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983755#post1983755)

Single Channel vs Dual Channel DDR Memory (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983759#post1983759)

Overclocking memory module(s) vs dual channel (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983760#post1983760)

256MB vs 512 MB vs 1GB, 1 module vs 2 modules (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983763#post1983763)

Dual Channel Memory (1 vs 2 sticks, sync vs async) (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983766#post1983766)

Dual Channel, Nforce2, P4 and AMD FSB (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983770#post1983770)

Some Benchmarks of CAS Latency on Overall Performance (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983775#post1983775)

Different RAS/CAS timing on memory latency (estimate) (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983778#post1983778)

What is cycle time and frequency (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983779#post1983779)

Frequency, clock, period of synchronous operations, latency (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983780#post1983780)

Latency (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983782#post1983782)

Analogy on Bus Speed, Bandwidth and Latency (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983785#post1983785)

Analogy for FSB, CAS2, CAS3 latency and bandwidth for DRAM memory (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1983786#post1983786)


For CPU, FSB, memory, ...

Summary for overclocking CPU and FSB (http://forum.oc-forums.com/vb/showthread.php?s=&postid=1789454#post1789454) (page 3)

[Spleen43]

knowledge is power and u must made me king. thx

How true! Great work:clap:

:attn:

[digitaloverlord]

Great iofo, can't wait to try it tommorow!

[ZedBias]

Really Really helpfull thanks very much! :D Answered all the questions I needed.

[ken@rojakpot]

hi guys, as my username says... I'm Ken from Rojakpot.com.

well, just thought I'd come over and post the direct link to our BIOS Optimization Guide :)

http://www.rojakpot.com/default.aspx?location=7&var1=18

or this simpler redirector page http://www.rojakpot.com/bog.aspx

Thanks for the good words guys :) I'm sure Adrian's a happier person now.

[Soundster]

Revision 8.0 Interim Release 4

http://www.rojakpot.com/bog.aspx

[DarkSide8416]

thanks

[simpleman]

those helped me out

[Firochromis]

I think the link works. Couldn' t find CAS Latency though :(

[I.M.O.G.]

CAS Latency defined:

http://www.kingston.com/tools/umg/umg10.asp

CAS Latency
The ratio between column access time and clock cycle time. CAS Latency 2 (CL2) offers a slight performance increase over CAS Latency 3 (CL3).

Welcome to the forums! (http://forum.oc-forums.com/vb/showthread.php?s=&threadid=241747)

[ProBoner]

wow good stuff!

I guess I have to reboot now while this info is still fresh in my head :D

[gcb]

I could not read the bios guide... don't know what's going on with that page right now...

anyway... the kingston glossary page is great, but it don't mention the obscure numbers in CAS... like, everybudy knows that latency should be the lowest numbers, since latency means WAIT, and fast overclocked computers dont wait :)

but i can't figure out the numbers that follow CAS latency 2.5

like... when i see an ad "CAS 2.5 1-2-3-4" i doesn't mean nothing to me... WHAT ARE THOSE NUMBERS? ...And do they make any diference if i'm not goingo to overclock a computer, like then main CAS number?

[Yamiyanazz]

Thanks. This answered my question.

[gamefoo21]

Hello,

I need this information like today. What kind of impact will CL3 have on performance when used on pc3200. This is compared to CL2.5. Its kingston value ram I ordered some in and well they got the CL3 stuff when I wanted the CL2.5. This will be running dual channel.

[vincent_1985]

i think they did that to try to be as un-bias as possible as a reviewer it's quite hard to do cuz we all have our own lil likes and dislikes i suppose.

[JezterVA]

I knew if looked long enough I would find this information somewhere on this board......Many Thanks Flounder.

[Radical]

Thanks, I had been wondering what the FSB Spread Spectrum did.

[PhoenixMDM]

YESS!! Flounder, you are the greatest!

[ledzep]

hi all
why am i missing some of the bios options souch as
"Fast Gate A20 Option "
"IDE HDD Block Mode"

any idea? im on the gigabye GA-8IPE-1000 mobo

ledzep.

[orionlion82]

Great work! this will help me go from "advanced user" to "employable" yee_haw!

[Hawk2k2]

sweet thx :) it answered some q's

[flounder43]

Updated the link so it is a direct link to the free version of the guide.

[Flashymang]

:D Awesome information! Thanks! I'm sure that guide will be usefull for me when i get my pc fixed (wich will probably be tomorrow cause i'm returning faulty mem modules, and guess what... even corsair mem modules can get faulty :cry: )

[Spacemonkey]

Nice work.

[Mhypertext]

Thanks man very nice

[Kileak]

Thanks a lot for this guide!

I was always wondering what some of the stuff in the BIOS was for but even mobo manufacturers don't even give details about what the options do.

Having read about the few options I wasn't familiar with I was able to set them properly and I am convinced my system runs better now!

Thanks a bunch!

[sevendevilhell]

nice article.

thanks for making this one a sticky; it can help a lot of people

[Kevin007]

thanks

[modfusion]

:) Your link is very informative. Got quite a bit of info! One item I need defined was missing from the list. :( What is CPU Interface??? (Pheonix BIOS on DFI board)

[mynihilism]

nice guide. thanks for posting it.

[XPIxEXAMPLE]

Wow, like the biggest mysteries of life revealed... cool

[truongbeo]

anyone have the PDF of this guide (The Definitive BIOS Optimization Guide)
Revision 8.8? I downloaded the one in the flounder's 1st post but it's Reevision 6.2
thx :)

[gomerpile]

Thanks for the page, I came here just for this reason. I just put in a new mb and processor and could not understand some of the ram timings, if I still have problems understanding some of the features in the bios I will ask.

[alphavirus]

this is the ****zle!

[netmask]

that's fine I think

[MELLOW420]

Hey im really needing to know whats a good PSU for my System, Also needing a cooling fan for my CPU, tired of resetting the bios because of the attempts to overclock :beer:

[hank123]

ok this is not the right place for this.
plz look for the right place.
we need to know everything bout your computer bro. what kind of cpu,ram,psu,mobo ect

and welcome!

[TheOldCodeToad]

Updated the link so it is a direct link to the free version of the guide.

Hi'ya Gents,

Old and long running thread. Many references to some amazingly good reference... but I can't find the link.

I feel like I'm searching for the Revealed Truth of All Existence or digging for the Oracle at Delphi [1].

Or I'm just having a senior moment :drool:

Either way, HEP OUT A BROTH'A, PLEEZE...

BTW, I'm new here. So hello all. I'll just stumble over and ring the bell, signalling a round for the house on me! :beer:

...and if your know that tradition it's KHUN CodeToad, yea?;)

Cheers,
CodeToad

[1] The Oracle in GREECE, not the one in Redwood Shores CA... sadly I know the later much too well! Both are known for sacrificing virgins...