Crucial pc2100 not OCing high enough?

Insthink · May 20, 2002

Ive been reading of people managing to reach 166mhz with their Crucial pc2100, what cas is that?

I got 2x256 crucial pc2100 but they cap at 147mhz with cas 2 and maximum DDR voltage

I got Epox 8k7a mobo with lastest BIOS and I set my memory settings to Fast (meaning lowest cas latencies)

silent bob · May 20, 2002

it could possibly be some other component holding you back like a nic or a modem and even scsi . I am running a scsi CDR and HD and I dont want to toast another card so I am keeping it pretty low on the OC 1.2 @ 1.3, and its pretty stable I only have to reboot once a week or so ,but look at other components befor determining it is your memory . Befor I put in scsi I had mine doing 160mhz on an Epox 8kha+, and was fine , just my $0.02

steve

edit >>Dont set it to Fastest or even Fast ,and I have had no luck with Turbo but thats just me

eli · May 20, 2002

I have my 256 stick of crucial doing 150 FSB with turbo timings at 2.8 volts. I only had one random reboot at 2.7, so I upped the voltage. Hopefully that will fix it, otherwise it's the PSU. (300 watt)

Insthink · May 20, 2002

Well I dont know what could be holding me back. I got a gforce3 at 4x agp, 2 network cards, sb live! thats all.

Also, i noticed my 5v is quite low, its 4.71v, is it my power supply? Its an Antec 300W

eli · May 20, 2002

Insthink said:
Also, i noticed my 5v is quite low, its 4.71v, is it my power supply? Its an Antec 300W

That is pretty low! That I would think be a definite indication that you need a more powerful PSU. Antec is usually a great PSU.

Insthink · May 20, 2002

So what would happen if I get a 350-450W PSU(Gonna get Enermax if so)? Cause even if its low, its not too low, which wouldnt affect stability, right?

Here are my sisoftware sandre results for voltage

CPU core voltage 2.07 V (Dont know if thats correct because I use epox 8k7a and got the jumper set to +0.4V for vcore)

+3.3w voltage 3.34v
+5v voltage 4.71v
+12v voltage 11.83

btw I was also thinking of doing the voltage mod for the epox 8k7a

http://www.ocinside.de/html/workshop/enmic_8kax_ep8k7a_vio_vcore.html

Comments?

Insthink · May 20, 2002

Also Ill add what my system is composed of to see if the low voltage is normal

3x80mm case fans, Dragon Orb 3 CPU fan, Gforce3, 2 network cards, 1 sound card, vcore +0.4, DDR voltage +0.3, Epox 8k7a, 50X cd drive, 12/10/32 CDRW drive, 40G 7200rpm HDD

I think thats it, and I may add a 90mm case fan on top of it all plus the voltage mod for my mobo which will increase voltage use

Yodums · May 20, 2002

Try adding more voltage. Micron/Crucial are major voltage eaters.

Yodums

Insthink · May 20, 2002

read my first post again

I said that i maxed at 147mhz fsb with max DDR voltage

Yodums · May 21, 2002

What is the voltage?

Seems like either two modules is holding you back. It took me 3.12v to hit 166 stable.

Insthink · May 21, 2002

at what cas latency?

Rottys-R-Us · May 21, 2002

Epox 8KHA+ with XP1600+, 256mb Crucial pc2100, setting all on high even Turbo, cas 2, Sparkle 350w PS, cheap VC nvidia GF 2mx 200, AX-7 HSF, 185x8.5

Genis B · May 21, 2002

nice~~~~~ my corsair can only do me 140 100% stable

here is my sysytem spec:
Green 1800XP AGOAG
Epox 8K7A
256 mb PC2400 Kingmax
256 mb PC2100 Corsair
Gigabyte Geforce 3 (orginal)

GTXP
hercules 5.1 speakers
canon BJC 3000
Hitachi CM771 19inc
Lite-on 16*10*40
Samsung 12 speed DVD
Vocalno 7CU+
10/100 Intel Pro 82557
40Gb 7200 rpm seagate
60Gb 7200 rpm WD
headphone, microphone 24 hr plug in

maybe because i got too many thing in my system.....

but i want to share a high FSB as well as my feature though

Yodums · May 21, 2002

Genis B said:
nice~~~~~ my corsair can only do me 140 100% stable
here is my sysytem spec:
Green 1800XP AGOAG
Epox 8K7A
256 mb PC2400 Kingmax
256 mb PC2100 Corsair
Gigabyte Geforce 3 (orginal)
GTXP
hercules 5.1 speakers
canon BJC 3000
Hitachi CM771 19inc
Lite-on 16*10*40
Samsung 12 speed DVD
Vocalno 7CU+
10/100 Intel Pro 82557
40Gb 7200 rpm seagate
60Gb 7200 rpm WD
headphone, microphone 24 hr plug in

maybe because i got too many thing in my system..... but i want to share a high FSB as well as my feature though

Rottys-R-Us, nice man, how much voltage is being pumped through that thing?

You do have alot of stuff in your system, but you have two different types of ram so I think that may screw you over.

Yodums

Insthink · May 21, 2002

Ok, here is what I got by changing my timings

My timings are 8872422
I can attain 170mhz FSB stable, but I needed to go down to 166mhz because my CPU cant go over 1580 and the multiplier doesnt allow me any higher FSB to not pass the 1580

In sisoft sandra I got 2013/2064 in my memory benchmark. If I lower my 7 to anything lower my system becomes unstable and would need to decrease my FSB down to 147 again.

What do you think?

UnseenMenace · May 22, 2002

Insthink said:
Well I dont know what could be holding me back. I got a gforce3 at 4x agp, 2 network cards, sb live! thats all.

I allways found that it was my soundblaster live value which held me back from getting high FSB speeds on my kha+.

Insthink · May 22, 2002

Well it was not any of my PCI devices, only my timings which I changed as stated in my earlier post

Passed 166fsb, my motherboard initiates 1/5 divider so I had no problem with that and im pretty sure the new BIOS allows me to select my PCI mhz without any relations to FSB since in a new setting it says PCI Clock and was at 33 default and I could move it by shots of 1

Malakai · May 24, 2002

Insthink said:
Well it was not any of my PCI devices, only my timings which I changed as stated in my earlier post

Passed 166fsb, my motherboard initiates 1/5 divider so I had no problem with that and im pretty sure the new BIOS allows me to select my PCI mhz without any relations to FSB since in a new setting it says PCI Clock and was at 33 default and I could move it by shots of 1

what!
on an 8K7A?

there are no dividers on that board.

-Malakai

Insthink · May 25, 2002

yes, the 8k7a will move from 1/4 to 1/5 PCI clock divider once it reaches 166 fsb and higher

Malakai · May 26, 2002

Insthink said:
yes, the 8k7a will move from 1/4 to 1/5 PCI clock divider once it reaches 166 fsb and higher

umm, no that is not true, it hasnt even been proven on the 8KHA+ (although i still suspect it). even if it is there, which i have never heard of, it is not proven and cannot be said for sure.

-Malakai

Crucial pc2100 not OCing high enough?

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