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Topic Title: Mobile XP in Desktop Motherboard
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Created On: 03/14/2006 12:12 PM
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 03/14/2006 12:12 PM
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HorseloverFat
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Joined: 03/14/2006

Hey everyone. I have an Asus A7N8X Deluxe motherboard, and I had my old Athlon XP 2500+ die on me and the only thing I could find at any store to replace it with was a 2800+ mobile XP. I've read lots of forums where people have said that mobile CPUs work fine with this board, but I can't get it to work properly. I set the external freq. and clock multiplier to 133 and 16, as AMD said I should, but the clock speed in the POST and in Windows is showing up as around 1ghz instead of around 2ghz, where it should be. I've changed the frequency and multiplier settings around quite a bit and every combination seems to result in half the clock speed that it should be.

So next, I thought maybe it was just reporting half the speed but running at double like it should be, so I did some benchmarking with PassMark Performance Test, and my other computer with a Sempron 2400+ scored considerably higher than the 2800+ so there definitely is something wrong.

The other issue is with the temperature - the hardware monitor in the BIOS is reporting around 70 celsius, but the PC Probe software temp. monitor is reporting around 42 (at idle). Thus I'm somewhat worried about turning the freq. and multiplier up too much because even though it seems to be massively underclocked right now the temperature is still being reported as relatively high. However I'm not even sure if that's accurate at all because the heatsink barely feels warm to the touch.

Can anyone help me out? Thanks!
 03/14/2006 12:35 PM
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HorseloverFat
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UPDATE:

Okay, so I just read that on this board, a multiplier higher than 13 gives an incorrect, low multiplier instead because it only uses 4 bits... So, I set it to 166 and 12.5, and got it running at 2083 mhz, which is a lower clock speed than what a frequency of 133 and a multiplier of 16 (what the mobile 2800+ should be set to) would generate. However, the hardware monitor in the BIOS now reports 95 degrees celsius and the computer powers down as soon as it enters Windows, presumably to prevent heat damage. However, I doubt that it is actually running that hot, because the heatsink still does not feel hot at all, only slightly warm. I don't understand
 03/16/2006 01:18 AM
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kirbalo
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quote:

Originally posted by: HorseloverFat
UPDATE:

Okay, so I just read that on this board, a multiplier higher than 13 gives an incorrect, low multiplier instead because it only uses 4 bits... So, I set it to 166 and 12.5, and got it running at 2083 mhz, which is a lower clock speed than what a frequency of 133 and a multiplier of 16 (what the mobile 2800+ should be set to) would generate. However, the hardware monitor in the BIOS now reports 95 degrees celsius and the computer powers down as soon as it enters Windows, presumably to prevent heat damage. However, I doubt that it is actually running that hot, because the heatsink still does not feel hot at all, only slightly warm. I don't understand



I would suggest reseating the Heatsink/Fan with fresh Arctic Silver 5 or Ceramique...

I would also download MotherBoard Monitor...an older program, but fully support the A7N8X family. It will give you another source...also, Everest Home Edition does a good job. Google for it...the free edition is "out of print" as of late last year.

You have two sensors for the CPU, the socket sensor, and the die "diode" sensor. They should match closely when everything is correct. The fact that the computer is powering down leads me to believe that the higher temp reading is correct.

Are you sure you have the sink mounted properly? What type of heatsink do you have?



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My Rigs:

Athlon 64 3400+ (CG) @ 2.4GHz, Asus K8N-E Deluxe, 2 GB OCZ DDR400, BFG nVidia 6800OC 128MB, Seagate 200GB PATA, Seagate 160GB PATA, Dual Boot XP and x64, Antec 350W Mid-Tower

Athlon 64 3400+ (E3) @ 2.4GHz, Asus K8N-E Deluxe, 2 GB OCZ DDR400, eVGA nVidia 6800 128MB, Seagate 320GB SATA, Vista x64, Antec 350W Mid-Tower
 03/16/2006 08:55 AM
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TLH
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I would suspect an incorrectly installed heatsink too.Reseat it with the recess properly over the notch.
Another thing you could check is that the vcore isn't too high and try running it at 11x200 if your memory is fast enough.You'll have an XP3200 then.

Edit:What heatsink are you using?

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