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my abit-ip35-pro max fsb?

post #1 of 4
Thread Starter 
Hello guys...
Im pretty new to overclocking ( sorry for being a noob )

I fail orthos after 1hr with fsb @ 500

my voltages are (in bios):

cpu VTT voltage...........1.21v
MCH (1.25v).................1.37v
ICH (1.05v)..................1.05v
ICHIO (1.5v).................1.65v
DDR2 reference voltage...0%
CPU GTLREF 0&2............67%
CPU GTLREF 1&3............67%


My multi is at 6 (500*6) and ill change that when my TRUE arrives (this week hopefully).
So im not worried about overclocking my cpu until then.

Any help to get it stable @ 500 would help HEAPS!
thank you to all
    
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post #2 of 4
Certain CPUs don't like low multipliers and high FSB. There's no real benefit to having a 1:1 ratio between your RAM and FSB actually. There have been numerous tests that show there's pretty much no real life advantage. It may look better on synthetic benchmarks though. I'd stick with the highest possible CPU multiplier if I were you. You're just putting unnecessary stress on your FSB running it at 500MHz when you could be running it much lower.
 
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post #3 of 4
Yeah, your NB is suffering if you lower your multiplier. This is taken from Pauldovi's guide:

Quote:
Originally Posted by pauldovi View Post

...
...
The Northbridge

The Northbridge is the link between your CPU, memory, graphics card (PCI Express) and Southbridge as shown in the diagram below:



Just like your CPU, the Northbridge on your motherboard (i865 and newer) has its own internal frequency and latencies which affect overall system stability. This is referred to as the NBCC (North Bridge Core Clock). The NBCC directly affects the performance and stability of your memory and CPU because Intel system used a NB based memory controller.
It has been recently discovered that the NBCC varies with your systems FSB and multiplier settings. The NBCC can be calculated by dividing your CPU current multiplier by its default multiplier and then multiplier the sum by your FSB.

For Example:

E6600 @ 500Mhz and a 7 multiplier:

(9 / 7) x 500 = 642Mhz NBCC

So it can be seen that lowering your multiplier, even though offering addition headway for FSB on the CPU, will increase the NBCC, reduce NB stability and thus cause the overall system stability to decrease.

XE (Extreme Edition) and ES (Engineering Sample) processors have the unique ability to adjust their multipliers up (All XE, not all ES) and down (all chips) while maintaining its multiplier status as default.

For Example:

X6800 @ 500Mhz and a 7 multiplier (just like above)

(7 / 7) x 500 = 500Mhz NBCC

As you can see, the X6800 has the exact same settings as the E6600, however, the NBCC is lower, resulting in increased system stability.

...
...

Edited by se7en56 - 6/4/08 at 8:52am
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post #4 of 4
Thread Starter 
I see.
I was only using a 6x multi because i didn't want to overclock my cpu until my TRUE got here.

so there is no real advantage of having a fsb @ 500 ?
what if i have an 8* multi?

I will drop down to 445 and go with a 9x multi.
My TRUE arrived today
    
CPUMotherboardGraphicsRAM
E8400 @ 3.9ghz (1.36v 434*9 VID1.225) Q744A814 Abit ip35 pro 8800gts 512mb (g92) 2 x 1gb Crucial Balistix 8500 
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250gb seagate 7200rpm xp pro sp2 pos 17" crt SilverStone ST50EF 
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lian li v1000 wmo 1.1a Razer mantis control 
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CPUMotherboardGraphicsRAM
E8400 @ 3.9ghz (1.36v 434*9 VID1.225) Q744A814 Abit ip35 pro 8800gts 512mb (g92) 2 x 1gb Crucial Balistix 8500 
Hard DriveOSMonitorPower
250gb seagate 7200rpm xp pro sp2 pos 17" crt SilverStone ST50EF 
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lian li v1000 wmo 1.1a Razer mantis control 
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