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intel915/GMA900 best overclockers (and sound in works)

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i am looking for a mobo that is known to overclock well.


- only intel915 / gma900 motherboards

- only one that sound input works

- can't rely on the wiki without hearing that sound in works firsthand


Research so far:


- MSI 915G Combo-FR - overclocks extremely well, but no sound in.

- Biostar i915G-M7 - overclocks well, sound unknown

- ASRock 775Dual - NOT a good overclocker

- Asus P5GD1-VM - can't overclock the FSB

- Asus P5GDC-V Delux - unknown

- Abit IG-80 - unknown

- AOpen i915Ga-PLF - unknown

- AOpen i915Ga-E - unknown

- Asus PTGD-LA (Goldfish3-GL8E) - unknown



If anyone has one of these models or another 915 that OC's well, please post your FSB frequencies, voltages, temps, etc... thanks.

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Just to round out your list with a 915 board that's not on it, I got the ASROCK P4Dual915GL which is a 478 socket instead of a 775 because I had a spare Prescott 2.4GHZ socket 478 with SSE3 that does 3.4GHZ stable. unfortunately, on the ASRock board I can't O/C a single MHZ beyond 2.4GHZ to this point. Sound works fine. Will need to check to see if sound input works when I get home. Regarding the video, I run 85Hz refresh rate at 1280x1024. Higher resolutions are available.


I'm not a socket 775 expert to this point so if there's a "best value" high performance 775 stepping, please let me know. I'll likely follow your approach and go with a good overclocking 915 board after RMAing this P4Dual board.

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You'll find that any motherboard with onboard graphics is not going to overclock very well or not overclock at all. The BIOS features on many m-ATX boards are not going to have options for vDIMM, FSB, memory timings or anything else to tweak the system. Other 915 based boards may have these options, but they won't be m-ATX or have onboard graphics.

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i'm almost certain to be getting the mSI 915g combo-fr.

was briefly considering a 945g board but theres no proof it will OC well, so....


what i've culled from other posts here and about:



- *****MSI 915G Combo-FR - ATX. Slow. But OC great! 800mhz FSB. DDR2 and DDR1. ICH6. SATA1. (SATA 150MB) 3 ide, 4 sata, 1 pci-e16, 2 pci-e1, 3pci, 4 USB in front, 4 in back. Discrepancy: either Realtek 8110S GigEth (GOOD) or Marvell 8053 Gb LAN (BAD!), VIA6410 IDE RAID, 8 Channel Azalia C-Media 9880L integrated in ICH6,


"...No sound in. GigEth at 100mbs works. 3Ghz 530J chip. OC great! FSB 245mhz stock voltage. 266mhz (4.0Ghz) with just 10% MCH chipset & ram voltage increase (no increase to cpu voltage) all with stock cooling and 45-55c temps. 280mhz FSB for short times on air (4.2Ghz!) 71 in xbench $100 Darwin in 4 seconds. 10 seconds more to Desktop. 20 seconds from restart to desktop!..."







- Biostar i915G-M7 mATX Video (QE, OGL), Audio, LAN, USB2, SATA. Flaky kybd/mouse. hit or miss with OCing. Cupojava $450 mac thread.



- *****Asus P5LD2-V - GMA950. ATX? QE, CG in OS X! meant for overclocking. ICH-7R Raid no go for os x?


- ***Asus P5LD2-VM - GMA950. mATX? slow darwin boot. QE, CG in OS X! GigEth works



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Found this just now on Hardware Secrets. Don't know if this just applies to 915P and 915X motherboards, or also to 915G chipset motherboards. At any rate, it seems the MSI 915G Combo FR overcomes the limitation based on the O/C you showed in the example.


================= Quote =======


On Intel i915P and i925X chipsets, Intel created a protection against overclocking, making socket 775 Pentium 4 processors overclocking extremely difficult.


That protection limits the overclocking to up to 10% of the standard front side bus clock. This happens because the buses (PCI Express, SATA and the link between the chipset’s north and south bridges) use the same clock generator and, hence, their frequencies vary according to the clock used. It causes problems to SATA and PCI Express devices, since there is no way of locking their frequencies. SATA devices, for example, have problems in working at frequencies higher than 110 MHz, and nVidia video cards tolerate the maximum of 120 MHz on PCI Express bus.


The protection against overclocking monitors the link between the chipset’s north and south bridges. Every time that link’s frequency goes beyond 10% of the standard clock, the board turns itself off or simply doesn’t turn on. A way of overcoming this blockade is by increasing the chipset voltage, which allows gains of 10 to 15 MHz.

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yeah...i've seen that too.


typically you want to lock the PCI slots to 33mhz.


SATA is new to me. i am hoping to find a facility that locks it to, i guess, 100mhz, if what you find is correct.


that part is very confusing to me.


at this point, if you study it a little more, you will find that both asus and abit found a way around these problems in mid 2004..and touted it heavily..their special approach. what is not so clear, is that i would have expected to see further bragging by the other vendors...like MSI etc..that they too cracked the code so to speack...yet i never saw that. only the fact that clearly, MSI and others are overclockable.


the key question is to TREXPLORER on these forums. he sustained a 267FSB and even 280FSB which is phenemonal, bypassing the 245FSB supposed SATA limit I mentioned here:




does he have SATA drives? can he manually fix an SATA divider as you can do with PCI?.....

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I have an Intel Pentium 4 e GHz (sse3) and I have it OCed at 4GHz. I installed my mac partition on a spare 80 GB HDD, I was dissapointed to learn that my sound AND lan does NOT work on the P4P800 SE, the sound is ADL AD1985 (just the AI {censored}) and the Marvel Yukon stuff that noone has kext'd yet. But I am @4.13GHz Stable with it, I got good Watercooling!

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