Date: Sat, 20 Dec 1997 13:02:16 -0800 (PST) From: Burton Sampley <bsampley@best.com> To: hardware@freebsd.org Subject: NCR810 (or 875) & Asus P55T2P4 & Overclocking ? Message-ID: <Pine.BSF.3.96.971220123839.18666A-100000@shell9.ba.best.com>
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Greetings, Has anyone successfully overclocked the above hardware (the MB is rev 3.1 BIOS rev 203)? I'm currently running a P5-233MMX at 266 (3.5X, 75MHz) with an older Adaptec 2940 (BIOS rev 1.16, I think). When I try cranking it up to the 83MHz bus speed (3.0X, 83MHz ~= 250) the SCSI devices wont fly (but my EIDE drives will). This is on FBSD 2.2-stable. I can get a great deal on the NCR controllers from a local supplier ($50 USD for the 810; $100 for the 875) instead of spending $200+ on the Adaptec. I searched the archives. Some people stated the Adaptec 2940UW is worth the extra $$$s and *should* work at the 83MHz bus speed (providing the rest of my hardware can support the higher bus speed). Is the Adaptec really worth the extra $$$? BTW, here's dmesg on my current drives: ahc0 <Adaptec 2940 SCSI host adapter> rev 3 int a irq 10 on pci0:11 ahc0: aic7870 Single Channel, SCSI Id=7, 16/255 SCBs ahc0 waiting for scsi devices to settle ahc0: target 0 Tagged Queuing Device (ahc0:0:0): "COMPAQ ST15150N 5216" type 0 fixed SCSI 2 sd0(ahc0:0:0): Direct-Access 4094MB (8386000 512 byte sectors) ahc0: target 1 Tagged Queuing Device (ahc0:1:0): "SEAGATE ST43400N 1028" type 0 fixed SCSI 2 sd1(ahc0:1:0): Direct-Access 2777MB (5688447 512 byte sectors) [sniped] wdc0 at 0x1f0-0x1f7 irq 14 flags 0xa0ffa0ff on isa wdc0: unit 0 (wd0): <WDC AC21600H>, 32-bit, multi-block-16 wd0: 1549MB (3173184 sectors), 3148 cyls, 16 heads, 63 S/T, 512 B/S wdc0: unit 1 (wd1): <WDC AC33100H>, 32-bit, multi-block-16 wd1: 3020MB (6185088 sectors), 6136 cyls, 16 heads, 63 S/T, 512 B/S wdc1 at 0x170-0x177 irq 15 flags 0xa0ffa0ff on isa wdc1: unit 0 (atapi): <CD-ROM CDU311/3.0i>, removable, accel, dma, iordis wcd0: 1378Kb/sec, 128Kb cache, audio play, 256 volume levels, ejectable tray wcd0: no disc inside, unlocked Thanks in advance. - burton -
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