Compaq Deskpro (5200MMX) CPU Upgrade

[450]

I'm wondering if I can place an AMD K6-III 380 MHZ CPU in place of the 200 MMX that is in there right now. My main concern is with the bios. I cannot find any updates. Will the computer support it?

Deskpro 2000 5200MMX

 

[wallijonn]

I believe the Compaqs used Pentium chips in their desktops. The "MMX" designation referred to Pentium processors. So the answer so "no," an AMD processor will not fit in the same socket as the Pentium.

 

[JeffL]

wallijonn is correct. You can't use an AMD processor in a motherboard designed for an Intel processor.

 

[450]

Hmm..? The AMD K6 series are socket 7. The Pentium 1 200 MMX is also socket 7 (66mhz bus). I've heard of using the K6-III to upgrade older machines.

 

[ReasonablyLucid]

What you people talking about?
in that day both intel and AMD used socket7, later on amd went onto super socket7 (100mhz fsb), while intel moved to slot1 and socket370.

As long as the K6 you are using has a 66mhz fsb then im sure you would be able to use it in that computer, you might need to flash the motherboard bios (with a newer version) if it doesnt work, to enable the higher multipliers.

Quote:

The "MMX" designation referred to Pentium processors. So the answer so "no," an AMD processor will not fit in the same socket as the Pentium.

*Bzzz* wrong, amd also uses the mmx cpu extensions starting with the K6 (They licenced the tech from intel)

 

[450]

The K6-III 380 uses a 100mhz bus but is commonly used for 66mhz bus speeds for 366mhz or higher.

Where can I flash my bios? I cant find anything for Compaq's proprietary bios.

 

[wallijonn]

If the K6-II 380 uses 100MHz fsb then you'll have to check your memory - you may have to upgrade it from PC66 to PC100. The 200MMX should have used 100fsb PC100 mem, though.

All the Compaq Deskpro 2000s I ever worked on had Intel Pentium chips.

Man, that stuff is old. Why not just turn it into a Linux firewall appliance?

Did your 5200 come with an LS120?

 

[wallijonn]

ReasonablyLucid,

I thought the Pentiums ran at about 2.8V. What did the K6-II run at? 2.2V?

I gave away a Tyan board because it wouldn't support a 350MHz cpu. I went with a Celeron 300 which immediately overclocked to 350.

I threw away two old computers, one with a AMD 500 and one with an Intel 700, I believe. I should have kept them to make a firewall appliance. I just didn't feel like spending money for disk drives, floppy drives, and memory.

 

[wallijonn]

450,

http://h200002.www2.hp.com/bc/docs/s...M_416b0797.pdf

check page 40 - I don't think 100MHz fsb are supported. So you may not be able to insert a K6-II cpu that has 100fsb. See also page 48.

Page 49 says that it came with 66MHz memory. Check also page 73.

http://h18007.www1.hp.com/support/fi...load/1181.html

http://h18007.www1.hp.com/support/fi.../model/69.html

http://h18007.www1.hp.com/support/fi...cate/4_69.html

Those were some happy times I had working at Compaq. Too bad all the bad memories were because of the managers.

 

[450]

wallijohn: I am going to run the cpu at 66mhz bus. That specific cpu is know to be able to do that. I can use multipliers in my favor to achieve at least 366 mhz. BTW: Its a K6-III no K6-II.

I know the stuff is old...really old. But, I like tinkering with this stuff. First off, if I mess up with a dual 6800 GT SLI setup its major $$$. But if I mess up here, its not that big of a loss. Second, DOS games are awesome!

BTW: When you decide to throw away your FX-55 system, tell me!

 

[Eagle_Driver]

Quote:

Originally Posted by 450 wallijohn: I am going to run the cpu at 66mhz bus. That specific cpu is know to be able to do that. I can use multipliers in my favor to achieve at least 366 mhz. BTW: Its a K6-III no K6-II. I know the stuff is old...really old. But, I like tinkering with this stuff. First off, if I mess up with a dual 6800 GT SLI setup its major $$$. But if I mess up here, its not that big of a loss. Second, DOS games are awesome! BTW: When you decide to throw away your FX-55 system, tell me!

Unfortunately, there is no BIOS version ever made for that Compaq system that will support even the K6-2, let alone the K6-III. Even with a 66MHz FSB, the highest clockspeed that you can set your old Compaq to run at is only 233MHz. Besides, that system pre-dates the K6-2 line, and none of its available BIOSes will even recognize the K6-III's on-die L2 cache (which would have converted the on-motherboard L2 cache into L3 cache on a properly supported motherboard). If you put a K6-III CPU on that system, chances are highly likely that your system will not even boot up at all due to the system's detection of an unsupported CPU.

As a result of the seriously limited multiplier support, the fastest CPU that you can use on that old Compaq is a 233MHz Intel Pentium MMX.

As for the 380MHz K6-III, you will need a Super Socket 7 motherboard that actually has a 95MHz FSB option in order to run that CPU correctly, since 380MHz CPUs from AMD were designed for a Front-Side Bus (FSB) clockspeed of 95MHz. (Another strange AMD CPU designed for the infamous 95MHz FSB is - surprisingly! - the 333MHz K6-2.)

 

[450]

http://www.upgradeability.com/K6plus/K6-III380.htm

 

[Eagle_Driver]

Quote:

Originally Posted by 450 http://www.upgradeability.com/K6plus/K6-III380.htm

I just read that. But the motherboard in your old Compaq still won't support that CPU, since no BIOS version which exists for it offers support for even the K6-2. Furthermore, the multiplier support on the Compaq motherboard will not go anywhere near high enough - the maximum multiplier support is only 3.5x, which will give you only 233MHz @ 66MHz FSB.

 

[450]

Hmmm...I thought the BIOS issues only popped up for the "+" models...

Doesn't it say 2X will yield 6X though?

 

[450]

Quote:

Originally Posted by wallijonn Did your 5200 come with an LS120?

Don't know, I picked it up at a garage sale. (it was only 5 dollars)