Tom's Hardware > Forum > Overclocking > General Discussions > FX-55*A8NSLI-P*2GBOCZPC4000EB*2X7800GT***LOW OC

FX-55*A8NSLI-P*2GBOCZPC4000EB*2X7800GT***LOW OC

Forum Overclocking : General Discussions - FX-55*A8NSLI-P*2GBOCZPC4000EB*2X7800GT***LOW OC

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billdavis   04-25-2006 at 12:16:33 AM

hey

im having problems OCing my computer past 2900mhz
the temps are good...under 50c on prime95 for cpu and chipset

but i can not get my fsb up to 250 i dont know if im doing something wrong
ill have my Vcore at 1.55v ram at 2.8v the chipset V maxed and HT V maxed

ill keep the multi at 13(stock) but if i raise the multi to 15with a htt of 200 itll crash or just not be stable?

i can get my htt to 224 but ill freeze after that and prime95 wound last more than a minute

also the X-Fi card does it require you to plug it a small 4 pin plug from the psu it worked fine w/o it but it works fine with it pluged in so i dont know if it is supposed to be in ot not???

i dont have a floppy to run memtest

thanks :( :( [b][/b]

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billdavis   04-26-2006 at 03:40:09 AM
- 0 +

it isnt the temp cause i can underclock the cpu and i still can not raise the htt past 223

i also lowered the divider on the ram to run 366 and lower and i can not get the htt up

i maxed out the stock voltage htt does anyone think i need more htt voltage any suggestions

im e-mailing marcus at OCZ and changing settings for the ram does nothing!!

can this mobo get a high htt??

Reply to billdavis
billdavis   04-26-2006 at 05:25:43 PM
- 0 +

it is the march 2006 bios

could a LTD or HTfreq of 3 be a problem or the fx-55 mulit at the stock 13 be it

i really dont know what is wrong here

Reply to billdavis
wooke   04-27-2006 at 04:54:13 PM
- 0 +

It looks like your RAM Voltage is low.

Check out this link for intructions on how to OC that ram but keep in mind it was designed to run at 250 with 3.3v.

Also consider the warning in this article advising active cooling for this ram when OC'ing.

Good Luck

http://www.pcstats.com/articleview.cfm?articleID=1801
:D

Reply to wooke
billdavis   04-27-2006 at 09:37:03 PM
- 0 +

thanks pal but it appears that the artical is on the pc4000 gold that you can put up to 3.3v not the platinum where if you volt it over 3v it will void the warranty

thanks though
:(

Reply to billdavis
falsterbo   04-29-2006 at 09:48:55 PM
- 0 +

My computer:
Asus A8N-SLI Premium
AMD 64 3700+ (San Diego) with Zalman CNPS9500 @ 3,0GHz
4x 512Mb Corsair PC4400/DDR550 @ 452MHz
2x GeForce 7800GT 256Mb in SLI-mode
2x 250Gb, 16Mb cache in RAID0 (Striped on Slilicon chipset)
250Gb, 8Mb cache on ATA133
250Gb, 8Mb cache on USB2.0
160Gb, 2Mb cache on USB2.0
SoundBlaster X-Fi ElitePro (with 4-pin floppy-cable connected
Hiper Type-R 630W
All this is in my Antec P180

My settings
Multiplier: 11x
FSB: 273MHz
HTT: 4x (4x273 = 1092MHz)
Ram: 1,66x (because of 4x 512Mb...)
vCore: 1,5v (max on my motherboard...)
vRam: 2.8v (standard is 2.7v)
vChipset: ?v (can´t remember but it is maxed out...)
vHTT: ?v (can´t remember but it is maxed out...)
Bios ver.: v1009
Temp idle: 32-36c
Temp max: 45c


Have you tried to set your ram to 1,66x instead of 2x? Maybe that will help...

You know that you can download an Image with Memtest86 and burn to a CD...

Reply to falsterbo
billdavis   04-29-2006 at 11:25:17 PM
- 0 +

nice setup

???are you prime 95 stable???

i figured out my problem it was using the Asus Ai booster, it for some reason wont let me go past htt of 223 (i dont have patients for rebooting bios) so now im using bios and nvidia nTune wich is a stable htt changer for me

im unable to get past 2900mhz multi11x263ram3-3-2-7-1t and be prime stable??? on prime95 im at 48*c

what are ur 3dmark05 scores mine is ~12,400

what are your 7800gt clocked to Mine is 479core and 1.11memory. I have the artic cooling X1`s in the mail

any idea why i cant get past 2.9 ghz???? temp? what is your temp ?

thanks

Reply to billdavis
falsterbo   04-30-2006 at 10:09:37 AM
- 0 +

My two 7800GT are clocked to 475/1149MHz with standard cooling... I am thinking of buying the new Zalman cooling for graphicscards.

I haven´t tested the computer with Prime95, but it is stable for hours when I run a lot of programs:
DC++, Nod32, MSN and a game like Battlefield 2... Then it is stable.
I will test the computer with Prime95 and if it´s not stable, then I´ll make it stable...

My temps are:
Idle: 32-36c
Max: 45c

In 3DMark05 I get 13.500p. But you can´t tell how fast a computer is with that program...

And I have Cool&Quiet ON. It works fine!!! Quiet computer with a clock at 3000MHz.

I have tried to turn off all the Overclocking AI stuff and just run the manuel mode?

Why don´t you set your multiplier to 14x (you have an FX...) and turn the FSB to 214-215MHz? Then you´ll get 3000MHz...

Reply to falsterbo
billdavis   04-30-2006 at 02:23:22 PM
- 0 +

i can clock it up to 3+ ghz but it will only run prime95 for a matter of seconds

i dont know why it is not stable, i can clock it to 3ghz on the multiplier or the htt but still no luck

at 2850mhz it is prime stable for 10 hours but that is all i have patients to wait for

i cant figure out why i cant get 3ghz???

also im runing it at 1.55v and you are 1.5? right i thought the more volt the better

Reply to billdavis
falsterbo   04-30-2006 at 06:43:14 PM
- 0 +

You shall have the needed voltage for the CPU to be stable... If you have more voltage it will probably be unstable again. I think I have too much vCore, so tomorrow will I test it with Prime95 and turn down the voltage.

I have got the San Diego version and you have another... So you can´t really compare our CPUs.

Maybe you need better cooling... Because if it gets warmer it needs more voltage and more voltage means warmer CPU...

Reply to falsterbo
falsterbo   05-01-2006 at 02:13:23 PM
- 0 +

I was unable to get my AMD64 3700+ stable at 3,0GHz with 1,5volts. I think the cpu needs more voltage to get stable, but I can´t give it more than 1,5v because of my motherboard...

So I turned down it to these settings and it´s memtest86 stable and hopefully Prime95 stable (I have only run Prime95 for 1 hour).
CPU clock: 2904MHz
Multiplier: 11x
FSB: 264MHz
Ram: 1,66x (438MHz)
HTT: 4x (1056MHz)
vCore: 1,425v (1,45-1,47v according to CPU-Z)
vRam: 2,8v
vHTT: 1,25v
vChipset: 1,6v

Temps
Idle: 28-32c
Max: 42c

With these settings I´ll get around 13 000 p in 3DMark05...

Reply to falsterbo
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