Old Pentium TX mobo

i've got a pentium tx mobo from a company called Biostar, and i runs my pentium mmx 233Mhz CPU on it...
i just upgraded the award bios to the newest version, and it is said to support the new AMD K6-2 (3d) chips...
so, i was thinking of upgrading my current CPU to the AMD-2...

btw, the older revision of the bios says that it can support AMD K5, K6 and pentium chips...

so, i was wondering whether could i use the AMD K6-2 on the mobo, here are its specs:

Manufacturer and Type: Biostar 8500TTD
Chipset: Intel TX Chipset
Processor Support: Socket 7 Processors, 66MHz bus or less
Multiplier Settings: 1.5-4.5 multipliers
Bus Speed Settings FSB: 55 60 66 75
PCI: 27.5 30 33 37.5

Expansion Slots: 4 PCI, 4 ISA, 0 AGP, 2 DIMM, 4 SIMM
Maximum Memory: 256 Megabytes
Connections for Fans: 1, 2 Prong Connections
Thermal Monitoring Connections: none

btw, although the max FSB according to them is 66, i've managed to OC it to 75, thus running my 233 Pentium as a 266MHz pentium (75 * 3.5)...

according to the manual, the mobo "provides 321-pin ZIF socket (socket 7)... i know this board is crappy, but i kinda need this as a 2nd computer

I WoNdEr HoW, I WoNdEr WhY, I WoNdEr WhErE ThEy ArE, ThE AMD... We OvErCloCked ToGeThEr, Oh YeAh...
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  1. you could well use the K6-II, available upto 550 MHz. you wont be able to use its full FSB of 100 MHz, but it will do 413 MHz at the FSB of 75 MHz max. you could even change the crystal on the board to get 100 MHz FSB, but that would be a overkill.
    but since board supports a multiplier of upto 4.5, you will be just able to run it at 337 MHz. you could well get a cheaper 350 MHz cpu for under $40.

    be sure to check the voltages, K6-II works at 2.2V core and 3.3V I/O


    <font color=blue>die-hard fans don't have heat-sinks!</font color=blue>
  2. You can use the K6-2 at 450MHz. The faster K6-2's have an INTERNAL 6x multiplier that is enabled when you set the board to 2x. This is known around the forum as the 2x=6x trick. You simply set your multiplier to 2x, your bus speed to 75, and viola! 450MHz!
    I am sure this will work as I have done it many times.

    Depending on your BIOS, it may say 133, 450, or the highest number in its table (most likely 266 on a Biostar board). Rest assured, when you get into Windows, a program such as WCPUID will tell you it's running at 450MHz.

    I recommend the K6-2 450 for this, it's cheap, and most have a 2.2v core. The 2.2v core can be used at up to 2.8v, if needed, as long as it's properly cooled. I recomend a decent Socket A Athlon cooler to do the job (yes, they do fit).

    Cast not thine pearls before the swine
  3. Just checked BIOSTARS website on <A HREF="http://www.biostar.com.tw/support/jumper setting/Pentium/8500ttd.htm" target="_new">your motherboard</A>. You do have a 2.2v core setting, and multipliers shown up to 5.5x. I still recommend the 2x=6x trick to get 450, simply because the 450 is just as cheap as the 400. I still recommend a Socket A Athlon cooler as well, as you simply can never have too much cooling.

    Cast not thine pearls before the swine
  4. 6X on K6-II? never heard that. do you have it on K6-II?

    the chips you worked on must have been K6-II+ (for mobile) which runs at 2.0V that the board does not support. running it at 2.2V even with decent cooling might damage the processor, not worth for a mere 6X=450 overclock.

    i would suggest getting a K6-II 400 MHz and run it at 412.5 MHz with a 5.5 multiplier at 75MHz FSB. thats the cheapest, best and safest thing to do.


    <font color=blue>die-hard fans don't have heat-sinks!</font color=blue>
  5. i just downloaded the K6-II manual and found this:

    <b>The ratio selected is dependent on the stepping of the Model 8. The 2.0x ratio is supported on the Model 8/[7:0], whereas the 6.0x ratio is supported on the Model 8/[F:8].</b> on page 92.

    so you must check the stepping of your CPU, and if at all you need a latest (and higher MHz CPU) for 6x multiplier, then better go for the standard cheaper 450 MHz CPU. those 37.5 MHz arent worth getting a faster CPU and still running at 450. :smile:


    <font color=blue>die-hard fans don't have heat-sinks!</font color=blue>
  6. is it compulsory to set the multiplier to 2 for the 450MHz K6-2 to let it be 450MHz???
    also, how do i set the multiplier to 5.5??? the highest multiplier i have found along the websites and the manual is only 3...
    btw, i won't really need a GLobal Win Cak38 or a Swiftech for the K6-2, would I??? can just a cheap aluminium one do???
    how about casing fans, would i need them???
    how big do you reckon should my PSU be???
    would i have to change the voltage mutliplier for the K6???
    anyway, thanx for your help, but, any websites you think i could get the AMD K6-2 from???

    I WoNdEr HoW, I WoNdEr WhY, I WoNdEr WhErE ThEy ArE, ThE AMD... We OvErCloCked ToGeThEr, Oh YeAh...
  7. NO YOUR SUGGESTION IS NOT THE BEST SOLUTION! Didn't yell to annoy you, just to get other readers attention...

    ALL of the faster K6-2's (like, from 350 up) are of the proper stepping to provide the 2x=6x multiplier conversion. 2x=6x is the only one that works on these processors to my knowlege.

    As for the 2.2v core faster processors are comming with various voltages from 2.1 to 2.4v, and the Mobile used 2.0v See <A HREF="http://users.erols.com/chare/elec.htm" target="_new">http://users.erols.com/chare/elec.htm</A>

    I have personally used 2.8v on the 2.2v processor, and have not had a warrantee return yet-cooling is the answer.

    The BEST solution is the 450 at 2x=6x, 75MHz system bus! It WILL WORK on ALL 450's!!!!!

    Cast not thine pearls before the swine
  8. Yes, you MUST use the 2x multiplier to make 450 work on your motherboard.

    No, you do not need to use a high-end cooler, I suggested a Socket A cooler so that you could pick a cheap one and still have it work good enough.

    You won't need many case fans, I do suggest a front intake to insure that air flows past the CPU itself.

    You should have a 200W or greater power supply.

    You should change the voltage. While your current 2.8v setting will work, it is best to use the proper 2.2v setting.

    You can find tthe online documentation by clicking on the link I provided in my previous post, including voltage settings and multipliers.

    Check Pricewatch for the best prices on the K6-2 450.

    Compgeeks has the 450ADK (2.1v version) for $31, which should work fine at 2.2v, and the 450AHX (2.4v version) which should work fine at 2.8v

    Cast not thine pearls before the swine
  9. well, dint K6-II start from 350 itself? i've never seen a K6-II 300, all those were just K6s.

    and if the processor revs are okay even then a 400~450 processor is okay for 412~450 MHz. he shouldnt buy a faster processor. will check the rev/stepping issue with all the K6-IIs i have, some three of them - a 350, 400 and a 500.


    <font color=blue>die-hard fans don't have heat-sinks!</font color=blue>
  10. The K6-2 was available in 233, 266, 300, and 333 speeds at first, then they were revised. The K6 was available in 166, 200, 233, 266, and 300. So there was a certain amount of cross over. Check my previous link to voltages

    Oh, and while your checking those things, check the core voltage of the 500, I have never seen a 2.2v 500 (supposedly they exist, but no one sees them, they are as a ghost floating through the industry).

    Cast not thine pearls before the swine
  11. so 100 MHz FSB K6-II started from 350, just like P-IIs.
    btw i have two K6-II 500 processors and they both run on Vcc 2.2V. in fact what voltage could be other than 2.2 for K6-IIs?

    <font color=blue>die-hard fans don't have heat-sinks!</font color=blue>
  12. I left you a link on a previous post. I have seen 2.1v, 2.2v, 2.3v, and 2.4v. I actually have a 2.1v 475 sitting in a computer right now waiting for sale. I have it set at 2.2v/500, but since I warrantee them, that shouldn't be a problem.
    I sell lots of computers at 6x66 and 6x75, using either 2.2v, 2.5v, or 2.8v, depending on what the motherboard supports. As previously stated, they are warranteed, so for the customer this is not a problem. And I haven't had a single one come back damaged.
    The official end to 66MHz FSB comes at 366. I have used the 380 at 4x66 (400) a few times and the 2x=6x multiplier conversion works fine.
    I have never owned a 500. I suppose the 475 I have is actually a mobile processor, according to the link I gave you. I have seen a 550 at 2.3v and had a 2.4v 450.

    So most are 2.2v, but recently AMD has been releasing some odd ones.

    Cast not thine pearls before the swine
  13. now now you guys have got me all confused...
    (sorry i know i sound stupid)...

    so now, i'll just grab a K6-2 at 450MHz, set the FSB to 75Mhz, the clock multiplier to 2, and the CPU would run at 450 Mhz, correct??
    in addition, i'll just set the core voltage at 2,2V, correct???

    btw, what abt those IO voltages and stuffs???

    also, you suggested earlier to grab a Socket A cooler and dump it in, you said it'd fit, but how should i mount the thing onto the mobo??? the mobo don't have all those clips the new socket A mobos have...

    one last question, is it possible to just somehow get a Socket A converter or something like that to put in a Duron 750MHz Socket A into my old mobo??? seems that i'm having difficulty getting the old K6-2

    I WoNdEr HoW, I WoNdEr WhY, I WoNdEr WhErE ThEy ArE, ThE AMD... We OvErCloCked ToGeThEr, Oh YeAh...
  14. I use Socket A/Socket 370 fans all the time. Socket 7 has the same clip spacing as those two.
    Yes, grap an AMD K6-2 450 and set the motherboard at 2x, 75MHz bus, 2.2v, and then you have 450.

    Eveything else stays teh same, only the muliplier, bus speed, and core voltage need to be set for the 450

    There are no converters. The K6-2 is available for under $30 on Pricewatch.com

    Cast not thine pearls before the swine
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