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Topic Title: Help me OC XP 2500 mobile
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Created On: 02/17/2005 12:20 AM
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 02/17/2005 12:20 AM
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neofx19
Junior Member

Posts: 1
Joined: 02/16/2005

System:
XP2500mobile
2X512 PC3200 Samsung Ram (default 2.5.3.3.8)
SL75frn2L motherboard w/1.7Power User Bios
40GIG WD drive
Sapphire 9800 NP
Thermaltake Silentboost w/silentcat.

Voltages
Vcore 1.85
Vdimm 2.8
Vdd 1.8

I can overclock it to 2.4ghz at 200mhz X 12 and have no memory errors running memtest and Super PI but when I try 200 X 12.5 i have memory errors. Why is this? I haven't overclocked the memory and the timings are at default. What should i do? (temps are at high30's low40's, and powersupply is running fine.) Please somebody help me..
 02/17/2005 01:48 AM
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SpeedTek
Senior Member

Posts: 2538
Joined: 10/05/2003

because you are hitting the limits of your CPU speed. You are going to get errors when things are running too fast, regardless of what method you use to overclock. BTW, overclocking using multipliers exclusively doesn't improve your performance much at all. The added latency induced by increasing the CPU multi can actually slow things down. Your best bet is always to lower multis and raise FSB. FSB overclocks will net you the highest gains in performance. The Samsung ram is actually pretty solid. I had a stick of 256 I just bought this week that I was playing around with. I inadvertently oc'd it while cranking up a spare A64 system I have. I wanted to see what my CPU limits were and I raised FSB to 230 and booted it. It ran fine and that's when I realized that I had forgotten to throttle back the ram with the 5/6 divider. My Samsung PC3200 was running at the full 230 without a hitch and I hadn't even touched the voltage.

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 02/17/2005 06:46 AM
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Runner30
Senior Member

Posts: 436
Joined: 12/16/2003

Samsung PC3200 is indeed a good overclocker.With timings 3-4-4-11 it will reach 242Mhz.

QUOTE
The added latency induced by increasing the CPU multi can actually slow things down


Can you explain this sentence?
Why 12.5x200 settings will be slower than 10x200?

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quote:A.M.D = All Men Desire.

System:HEC 475Watt.AMD Athlon XP-M2500 IQYHA0351MPMW.
Abit NF7v2*Sp97*NB1+delta*A-DATA DDR500
MSI 'the rock' RX9800*WD800JB
*257x10@1.83V*261x10@1.9V (CPC off)
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