A8N32-SLI x2 4800 overclocking HELP

[ginokid]

Hi guys,

I'm a noob to overclocking... but not PC building.
I will list my PC specs below. I want to overclock my x2 4800.
I tried overclocking by changing my FSB to 217 with the multiplier @ 12x which gave me about 2.6ghz but when I play BF2 it screen freezes and I have to restart so I guess whatever I'm doing is unstable.
Everything in the bios is left on default.

I have 2 x1GB sticks of Corsair XMS Extreme Platnium, I changed my ram timings to T1 2.0-3-3-6 @ 2.75volts

Has anyone got a stable high OC with a x2 4800?? If so please post your specs.. so I can duplicate them.

Thank you in advance,
Gino

My PC spec's:
ASUS A8N32 SLI Deluxe
AMD dual core 4800
2 x1 GB DDR400 Corsair XMS Extreme Platnium Twinx2048-3200c2pt
(T1 2.0-3-3-6 @ 2.75Volts) Dual Channel
ZALMAN CNPS9500 92mm Cooling Fan with Heatsink
2 eVga 7900 GTX 512mb SLI
Power & Cooling 1,000watt PSU
2 Western Digital 36gb Raptors Raid 0
Lian Li V COOL PC-V1200B plus Black Aluminum ATX Mid Tower Computer Case
(2) 120mm fans

[wonkanoby]

use a ram divider and see if its the cpu or ram dont like it

[impar]

Greetings!

And you should keep your HT bellow 1000, default is 5*200. If you tried overclocking at 5*217 that would be a cause for instability.

Might want to browse through articles posted here:
http://www.nforcershq.com/forum/a64-overclocking-article-vt58536.html

[ginokid]

WONKANOBOY - Whats a ram divider.. sorry I'm a newb at this.

IMPAR - I will try lowering the HT to x4 see what happens.

Thanks in advance,
Gino

[wonkanoby]

on the asus i have they call it max memmory clock in th bios

look in manual dram configuration at a guess

if you set the ram to 333

as you o/c it will get faster but still be below 400

as default it will be at 400 now so as you o/c so you o/c the ram

so with your o/c it will be trying to run at 2x 217 ie 434

[ginokid]

Has anyone overclocked an x2 4800? with an A8N32 SLI Deluxe board??

If so please post your bios settings.

Thanks
Gino

[Gilly]

its very much like my Opteron 175 (a 4400+). If you want to see how far you can overclock bus speed wise.... use memory speed "100Mhz" (which means half HTT speed), Descrease the multiplier from 12 to 10 and increase the bus speed up and up in 5Mhz incriments. Initially i just tried Superpi through 1M places, at 220x10 for example, i would guarantee it will work perfectly, past 250x10 at default voltages will be flakey i would guess....

at the point it becomes unstable (run more places of superpi the futher you go.... beyond 240x10 i would use 32M, mixed with some prime, and dont forget to LOAD BOTH CORES! you can increase the voltage a little bit, although the X2 chips do run warm with stock cooling

if you load the good core it wil pass superpi, but crash windows etc, so load both cores.

Make sure you set the HTT to x3... my board is flakey past 1100Mhz HTT.. some go to 1200 or a lot more on the RD580 chipset.

[LostBok]

- what do you reckon is good number to calc up to for superPI?

i.e. would you regard a pass at 2M, but a convergence (or any other) fail at 2M a "failed OC"?

does it have to do the full 32M for you to be happy?

[LostBok]

I'd agreed with pretty much all the sentiments above: don't push your HTT over 1000Mhz: besides the performance difference between 600Mhz and 800Mhz is small-ish and going to 1000Mhz is of negligible benefit, why risk instability by trying to get it higher - makes about as much sense as one chap who was wanting help OC'ing his RAMDAC!!

As people here will testify to (i.e. myself!) don't trust AiBooster's report on you "FSB speed" - this should be your HTL/HTT speed, but mine was mis-reporting - use something like CBid to get a more accurate reading.

I wouldn't bother pushing the memory voltage issue too much, you can OC that system pretty far without OC'ing the memory at all:

(1) change the memory divider to "333Mhz"
(2) change the HTL/HTT multiplier to 4x.
(3) change the HTT speed to your last "unstable" OC 217Mhz?
(4) reboot and stability test

At this speed your RAM will be approx: 217/200 x 333 = 361Mhz, so still underclocked, despite nearly 10% increase in CPU speed.

Ideally you will find your max CPU speed for whatever CPU voltage/temp you are comfortable with and then find a combination of multiplier and HTT speed that will get you memory as close to 400Mhz as possible.

e.g. my old AMD3500+ was a nicely "balanced" overclock - 2200Mhz default and I had it clocked to:

Multiplier down from 11x to 10x.
HTT @ 250Mhz
HTL @ 4x (1000Mhz)
Corsair twinX 3200LLPRO @ "333Mhz" ratio = 250/200 x 333Mhz = 416Mhz (***APPROX!)
Voltage @ 1.4V (raised, but still pretty safe)

A modest 4% RAM OC, but a 300Mhz (14%) CPU OC.

2500Mhz at 1.4v still had that system idle at about 28-29C and maxing out around 44C.

Current system was bought specifically for the OC potential (1.8Ghz default, so 400Mhz slower than it's predecessor, but dual core and 2x1Mb cache!).

Multiplier at 9x (the peak!!).
HTT @ 295Mhz
HTL @ 3x (885Mhz)
Corsair twinX 4000PT @ "333Mhz" ratio = 295/200 x 333Mhz = 492Mhz (***APPROX!)
Memory unclocked slightly, but CPU @ 2655Mhz = 47.5% OC

Please do NOT expect your to do 40%!!! It is a similar core to mine - even specially picked, watercooled FX60's and FX62's aren't doing much more than 3Ghz!

***Please note - those mem calcs are NOT exact - they are a ballpark number - you actual memory speed will be based on the divider that your motherboard will use.

[nforce_solo]

how do you overclock ur parts?