Overclocking with ABIT NF7

Spitfire_x86 · Jul 22, 2003

I'm not familiar with overclocking features of this mobo. Here's my questions:-

#1) This mobo's PCI/AGP bus lock is enabled by default?

#1) Can this mobo unlock "Morgan" Duron?

#2) If the AGP frequency is set to 66 MHz, then the PCI/AGP bus will be locked to 33/66 MHz (regardless of FBS)?

#3) What's the function of "CPU Interface"? The manual says-

 When set to disabled (default) then the system will use most stable CPU/FSB parameters. If you choose "enabled" then the system will use overclock CPU/FSB parameters. 

Is this option related with PCI/AGP bus lock?

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pIII_Man · Jul 22, 2003

i do not think it will unlock the processor...

if you set the agp bus to 66mhz it will be locked there...along with the pci bus i would persume (although your pci and agp bus can probably take more than that cpu can...my agp card can run up and over 95mhz and my pci bus can run @ 42mhz)

The cpu interface set as enabled should increase the speed of the processor...i donot think it will overclock the fsb but possibly force it to run with @ low latencies (this would count as overclocking i guess). No i do not think it is related to the bus lock.

There is no smell better than fried silicon :evil:

Spitfire_x86 · Jul 22, 2003

I'm using memory @ 2.0-2-2-5 without enabling this option

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Prof133 · Jul 22, 2003

For nForce2, PCI bus runs at a fixed frequency. No need for manual PCI lock. AGP is adjustable. PCI, FSB and AGP are all independant of each other.

If the AGP frequency is set to 66 MHz, then the PCI/AGP bus will be locked to 33/66 MHz (regardless of FBS)?

Yes. AGP will be at whatever value you request. PCI bus will remain at 33MHz in all cases.

Logic over all.

markgun · Jul 22, 2003

Wanna do an experiment for me?

1) Go to power management and set the S1 thing to S3
2) Keep your current memory timings
3) Put your computer in standby
Now tell me if the screen stays black but the power kicks back on when resuming from standby - just hit the power button to resume from standby
4) Raise your memory timings to 2.5-3-3-6 and tell me if it now works correctly.

Thank you!

Qui habet aures audiendi audiat

pIII_Man · Jul 22, 2003

i have heard of problems like this on the nf-7 LL memory = strange things in S3...

I spitfire although you already have good memory timmings i guarantee that if you enable cpu interface you will have the same if not better perforance...

There is no smell better than fried silicon :evil:

markgun · Jul 22, 2003

i have heard of problems like this on the nf-7 LL memory = strange things in S3...

Yep, it seems to be a problem with virtually everyone on the Abit forums, at least with the NF7-S.

CL 2.0 + S3 = no S3

Qui habet aures audiendi audiat

Spitfire_x86 · Jul 23, 2003

PCI bus lock is NOT working!!!

I've set the FSB to 102 MHz, just for testing the PCI bus lock. And Sandra reports that PCI bus is running at 34 MHz (1/3 of 102). With 100 MHz FSB, Sandra tells that PCI bus is running at 33 MHz

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Prof133 · Jul 23, 2003

* Cannot be measured through software.

* nForce2 disassociates the FSB speed from the AGP and PCI Bus speeds.

Logic over all.

Spitfire_x86 · Jul 23, 2003

So it's impossible to measure locked PCI speed? How Sandra measures PCI clock?

I want to be 100% sure that I'm not going to kill my whole system with overclocked PCI bus

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pIII_Man · Jul 23, 2003

i bet it just assumes what divider is being used...there is really no way to get a real time pci bus speed...they do sell pci cards that do read the pci bus speed i beleive...i have no links though because i saw it in a mobo review a while back...

There is no smell better than fried silicon :evil:

Prof133 · Jul 23, 2003

* You may be able to measure it using a PC geiger device.

* Could search or ask at <A HREF="http://www.nForcersHQ.com/forum" target="_new">nForcersHQ</A> on this topic. It's been discussed plenty there.

Logic over all.

Spitfire_x86 · Jul 23, 2003

What is "PC geiger device"?

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Spitfire_x86 · Jul 23, 2003

BTW, it would be better if you can give me some link

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Prof133 · Jul 23, 2003

A hardware monitoring system.<A HREF="http://www.pcreview.co.uk/article.php?threadid=368" target="_new">Here's</A> a review.

Logic over all.

markgun · Jul 23, 2003

<A HREF="http://forum.abit-usa.com/showthread.php?s=305001d7405e96a2e680a211bba46868&threadid=10221&perpage=15&highlight=PCI Freq&pagenumber=3" target="_new"> In this thread</A> at the Abit forum they came to the conclusion that the PCI is totally locked. I believe them! They used special equipment there to measure the frequency. I suppose you could E-mail Abit if you want to be absolutely sure.

Qui habet aures audiendi audiat

Spitfire_x86 · Jul 24, 2003

Thanks for the link. Now I feel more comfortable about overclocking.

And the "CPU FSB/DRAM ratio" option has nothing to do with PCI lock? Why this thing exists?

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Prof133 · Jul 24, 2003

It is used to control the FSB/Memory_Speed Ratio. Has no effect on the PCI bus speed/PCI Lock. For an Athlon it is highly recommended that we use one of the 1:1 CPU FSB/DRAM ratios .

Logic over all.

Spitfire_x86 · Jul 25, 2003

Threre's no 1:1 option, there's 3/3 and 6/6. Can we call them 1:1?

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Prof133 · Jul 25, 2003

Correct. That's why I said one of the 1:1 ratios (3/3, 6/6, etc.) as opposed to *the* 1:1 ratio. And yes, we can call them 1:1. Will result in Sync FSB/Memory_Speed.

Logic over all.

Overclocking with ABIT NF7

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