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a64 3000+ oc issue

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imported_asfd

Member
My previous rig: a64 3000+ 754 newcastle, 2x256Mb crucial pc2100 ram, mobo Asus k8n w/ nvidia-250 chip. I oc CPU to 220 fsb x10 = 2.2 Ghz, ram to 148hz (ram:cpu = 2:3), which runs pretty stable, and passed prime95 on 12 hours mixed testing.
My current rig: only replaced the ram with one 512mb crucial pc3200, and oc the ram to 220hz (ram:cpu = 1:1), . However, I cannot pass prime95 anymore, it even fails after 1 minute. First I thought it could the ram issue, but after run memtest86 for 15+ hours, not a single error.
I am totally confused, why my oc cannot pass prime95 any more after upgrading ram? any idea? TIA.
 
running your RAM at 220 HZ it sounds like underclocking to me 😛 I suppose it could be power related...
What power supply is on your machine? and anyhow going from 148 to 220 is a pretty big jump. You make it sound as if it is just a few Mhz and should be no big deal.

bfonnes
 
220hz is underclocking? yep, I know what you mean 🙂, typo, should be 220mhz, right? ok, my psu is antec true430, drives 2 HDs, 1 DVD writer. Thank you, bfonnes.
 
ok, I am not an expert or anything, power could be fine, but I think you might have to raise the voltage on your memory sometimes to get higher overclocks
bfonnes
 
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