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I975X Straps?

post #1 of 7
Thread Starter 
Anyone know what the FSB straps are for this chipset? Not finding it on OCN, my board is in specs below.
     
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post #2 of 7
Yes, for the P5W DH there is a strap change at 221 FSB which I believe is the start of the 1066 strap. That seems to be it. Unlike the 965 chipset, the 975 doesn't change at 401 fsb to the 1333strap. This is why the P5W does not overclock as high as the P5B. It keeps the tighter timings after 400 FSB but the trade off seems to be a 450FSB ceiling. Best I could do stable was 432FSB.
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post #3 of 7
How do you feel about 2004 bios. I'm still using 1901?
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post #4 of 7
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e5700 HD6670 Ceton InfiniTV 4 4GB G-Skill DDR2 1066 
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60 GB Agility 3 (OS Drive) Hitachi 3TB (TV Buffer and Recording) LG Blu-Ray Burner Windows 7 Ultimate 
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58" Samsung Plasma DH101 Polk CS2 (Center) Polk Monitor 70 (FL/FR) 
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post #5 of 7
Thread Starter 
I find this bios stable works just as well as the other revisions since it enhances memory compatibility and supports new CPUs (I think) Iam sticking with it and thanks for the info.

@JPM are you sure it don't change to the 1333FSB strap at 401FSB? Since bios 1707 this board supports FSB 1333 I just can't go that high with this Netburst CPU -_-
     
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post #6 of 7
I thought that too but when I tested it there was still no performance dip at 401 to indicate a strap change.

have a look as this program, Systool, LINK

Its pretty good I reckon.

It is only an alpha version but under i915/i925/i955 tab you will find a read button. It will tell you your current strap as well as memory timings. It doesn't say i975 but if you look at the change log build 726 you can see that it will read the i975 chipset.

I have run tests at 399, 400, 401 and there is nothing indicating a strap change. At 220, 221 there definitley is.

220 FSB 2M Super PI = 00.59.406
221 FSB 2M Super PI = 00.59.140 (clockgened up to 221 in windows to keep current strap)
221 FSB 2M Super PI = 01.00.468

I haven't retested with the 2004 bios yet so maybe things have changed. All this was with 1901.
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RAID 10 - RocketRaid 3510 XP 64 & VISTA 64 22 " Asus Widescreen 2ms Enermax Infiniti 720 
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post #7 of 7
They all beat me to it. Yeah, they only have a 1066 strap. They are not 1333 chip ready as of yet. Maybe with some massaging BIOS releases will come out enabling one. Hell, there might be some already.
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