compaq presario 1255 processor upgrade

Compaq / 1255
April 27, 2011 at 19:20:22
Specs: Windows XP, amd-k6/160meg
can I upgrade my compaq presario 1255 processor to a faster version? It has an AMD-K6 327mhz.

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#1
April 27, 2011 at 20:03:46
That model has a maximum FSB of 66 mhz. If it could be bumped up to 100 then you could use a K6 at 550 mhz--their fastest. But you should be able to run a K6 meant for a 100 fsb at 66 instead. It would run at a lower overall speed than it's meant to but faster than the 333 you have now.

Anyway, check out the discussion here:

http://forums11.itrc.hp.com/service...

There's a link in the second to the last posting that gives detailed DIP switch setting if you need those. The bus speed X the multiplier is the speed the cpu is running at. You may be able to overclock your 333 to 366 or 400 by changing the multiplier or you could get a new cpu.

Obama's a 2012'er. That explains EVERYTHING..


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#2
April 28, 2011 at 02:48:52
Unless you can get the parts really cheap. You would be bettter off getting a P4 system.

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#3
April 28, 2011 at 05:51:44
With only 160MB RAM, you should NOT be running XP on that system. It's time to step into the modern age.

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Related Solutions

#4
April 28, 2011 at 17:43:13
Thanks for the quick reply. I can buy a K6 500 for 6.95 so I will give it a try.

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#5
April 28, 2011 at 17:46:51
Hey, thanks for your feedback. I am just using the laptop to check email and maybe some light surfing. I have a good late model Dell desktop that I will be using most of the time. I had this old Compaq and thought I might be able use it for quick email checks.

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#6
April 28, 2011 at 19:36:21
OK, follow what they did in the link in my post above and you should be OK. However, I doubt you'll see much of an increase in performance.

Obama's a 2012'er. That explains EVERYTHING..


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#7
April 28, 2011 at 19:46:10
Thanks again, I'll let you know how it goes with the 500.

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#8
May 9, 2011 at 19:00:00
I got the 500 mhz processor installed and found that the max clock speed I can select is 366 mhz. I played around a bit with virtual memory and found that if I use a 1 gig thumbdrive as virtual memory it speeds it up a bit more. With the 500 mhz processor, I am guessing, it seems to be about 15% faster. If I can find a K6 series III processor it has a built in L2 256 meg cache. That should speed it up more. I guy said it used one and it improve performance substantially. It is running fast enough now to check email. I had Norton virus software installed and it was using about 50% of the processor bandwidth. I removed it and installed Avast which doesn't use as much bandwidth. Thanks again for your help.

Regards,
Rog


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#9
May 9, 2011 at 20:11:10
Did you try the undocumented 6X multiplier? If it works that'll give you 400 mhz.

Yeah, a K6-III would be faster. There used to be a page on AMD's site that compared their K6 processors with Intel's. According to them, their K6-III's were comparable to Intel's P-III's running at the same speed. They're kinda hard to find. Look for a 450 mhz one.

Good idea to get rid of the norton stuff. It's an incredible resource hog. I personally don't run any antivirus software. Most of the stuff you might get infected with is just annoying malwar--and not the drive-destroying stuff of years ago--and can be removed with malwarebytes or similar software. But I'll admit that can be risky. A couple weeks ago I got hit by a fake virus alert that malwarebyres couldn't remove. It took me a couple hours to manually get rid of it.

Ding dong the witch is dead. . . .


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#10
May 10, 2011 at 20:22:03
I did try the undocumented 6x multiplier and the properties under my computer show ed it was running at 262 mhz. It was definitely slower with that switch setting. I am going to look for a cheap K6-III. Thanks for the report on AMD's comparison.

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#11
May 18, 2011 at 22:51:33
If you haven't gotten a K6-III yet there's some in this ebay lot:

http://cgi.ebay.com/CPU-Processors-...

Ding dong the witch is dead. . . .


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#12
May 20, 2011 at 07:15:57
Thanks for the heads-up on the K6-III. I had found one for 36.00 but don't want to spend that much. I'm not really cheap but I have already put $50.00 in this old laptop by upgrading the HDD, Memory, and installing a network card. Unless I find a K6-III really cheap I will probably just say with what I have.

Thanks again.


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#13
May 20, 2011 at 19:45:45
You're welcome. Most of the cheaper K6's you're going to find are being sold as scrap. That doesn't necessarily mean they're bad, just outdated.

I forgot about it being a laptop. Make sure the cpu you buy has a voltage that's compatible with the laptop. I'm not sure if AMD had different cpus with lower voltages for use in laptops.

Ding dong the witch is dead. . . .


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#14
May 22, 2011 at 12:29:29
I will let you know if I get a K6-III processor and how it works out.

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