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Geek Culture / A weird pc problem...

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dre
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Joined: 20th Jan 2005
Location: West Side
Posted: 25th Dec 2005 08:30
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So i get a Sempron 2600+ and i get Corsair ram...and then i get ram heatsink and a zalman 92mm fan and some arctic cooling and i set up the system, ready to overclock. So I get in AwardBIOS and start tweaking the FSB, ocing it by a puny 15 mhz...and when I save and exit...the system just freezes in boot right when it gets past CPU and ram checking...it's supposed to go on to ide drives but it doesnt even try...and I've ocd be4 and this didnt happen. The chipset is a SiS 755 btw. So what I did was take out the cmos ram battery and let the bios clear so I could use the pc again, and it start up happily, like nothing happened...now I didnt try to oc again (but i will tomorrow) and im pretty sure that there was no heating problem since I cranked out the fanbus to full so the fan was runnig at 2.4k rpm or so and the ram was fine I set it to timings of 3-4-4-8 at 215 mhz (15 mhz oc on fsb). Can anyone explain what happened? I'll try to oc again by 1 mhz and if it doesnt work then it obviously doesnt want me ocing...if thats the case then why have the option anyway? Thanks for your help (if I get any, that is ) and Merry Christmas!

Athlon 64 X2 4400+, nForce 4 Ultra chipset, 1 gig ddr400 d-channel, GeForce 7800 GTX OC,2 WD 74 gig Raptors in RAID
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Three Score
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Joined: 18th Jun 2004
Location: behind you
Posted: 25th Dec 2005 11:07
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i heard 15mhz is a lot to overclock(or at leats for gpus anyway)
usually if it wont boot after that then its fried but since it did but didnt do anything i have no idea

I didnt fail, I just found 10,000 ways that don't work
-Thomas Edison
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blanky
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Posted: 25th Dec 2005 14:37 Edited at: 25th Dec 2005 14:39
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It could be that your computer is struggling to get enough power from your PSU (Power Supply Unit). That small 15MHz increase could be enough to push it over the edge, and so not enough power can get to all the components (hence the lack of anything happening).

Generally you overclock using a Windows-based tool (such as ATITool, which runs a demo during the benchmark to make sure the setting won't crash the PC under stress) and go in 5-10MHz increases.

How much wattage is your PSU pushing?

[edit] Oops, I thought you were trying to overclock your graphics card, not your CPU... But what I said above still applies. [/edit]

16-colour PNGs pwn.
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dre
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Joined: 20th Jan 2005
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Posted: 25th Dec 2005 20:24 Edited at: 25th Dec 2005 20:25
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Ohhh...you just gave me an idea, should've thought of this before...I should increase the voltage to the cpu, although I'm not sure if 15 mhz really needs a voltage boost, but worth a try. By the way I have a 450w psu so it's not a power problem...and I doubt booting will really require as much power as for example, a game would. And yea, I am talking about CPU overclocking (although the video card here is also overcloked by 35 mhz core and 20 mhz ram).

Athlon 64 X2 4400+, nForce 4 Ultra chipset, 1 gig ddr400 d-channel, GeForce 7800 GTX OC,2 WD 74 gig Raptors in RAID
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dre
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Posted: 27th Dec 2005 04:37 Edited at: 27th Dec 2005 04:39
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Well I've increased the DIMM and CPU voltages and all it wants to overclock to is 202 mhz fsb...omg! A freakin 2 mhz more However, I also set the ram CAS to 2 (prolly like 2-3-3-5), maxing out 1.62 ghz and somehow ran 200 points more in 3D Mark 01 SE...again, weird. Sadly, this is nowhere near my goal, and obviously, there would've been a lot to be gained at much higher speeds. This isn't a matter of reaching the limit, something in my system just doesn't want me overclocking at all...

Athlon 64 X2 4400+, nForce 4 Ultra chipset, 1 gig ddr400 d-channel, GeForce 7800 GTX OC,2 WD 74 gig Raptors in RAID
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Neofish
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Location: A swimming pool of coke
Posted: 27th Dec 2005 10:28 Edited at: 27th Dec 2005 10:29
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it would be safer to only change one value at a time, a probably leave ram alone completely -_-

also go up in values of 5, 15 is too much to be certain and you proc (by the sounds of it) wont ahve too much flexibility (i cant go much past 240 for example)

New site!
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dre
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Posted: 28th Dec 2005 00:00 Edited at: 28th Dec 2005 00:01
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I've tried going up by values of 1, as soon as I hit 204 mhz fsb then the magical boot freeze happens, pretending there's something wrong. The CPU is doing 26-29C idle and about 48C tops after hours of nonstop NFSMW, so I guess it just has some invisible barrier that prevents overclocking. I would try to flash the bios but dealing with these kind of pcs, for all I know it could just blow up in my face...

Athlon 64 X2 4400+, nForce 4 Ultra chipset, 1 gig ddr400 d-channel, GeForce 7800 GTX OC,2 WD 74 gig Raptors in RAID
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