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Socket 5 MOBO Assistance..

And just in case it's unclear, you can always use faster chips than are called for, and sometimes there's even a benefit to doing so. For example, an average 486 only really needs 20-25ns cache, but a lot of BIOSes have options to reduce the cache wait states (and thus get faster performance) if you use faster chips like 15ns or whatever.
 
Definately a P 75 MHZ...

So I am pretty sure that was the board (R512 Pentium PCI from M)..

Not sure if anyone found anything else?

Gonna buy the cache and RAM for it!
 
It is very difficult to ID from just a pic with no other information. When you go into the BIOS setup, on the first screen there should be a string of numbers that identify which BIOS is installed, it is usually the same numbers displayed on the screen during boot. It will look similar to this 04/16/96-i430FX-2A59CS9BC-00.
With those numbers we can search for what you really have. If you can provide BIOS manufacturer (Award, Phoenix, etc.) that will help too.
 
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Smack2k said:
ROM PCI/ISA BIOS (2A5IAR09) is all that is listed at the top
Click to expand...

That's an M Tech motherboard identified by (2A5IAR09). Looking at the old MTI website, there is no mention of the R512 or variations anywhere.

That board seems to have been purposely phased out/forgotten or was a special run for someone.
 
Great....now I am really stuck....

Would ANY 15 or 20ns cache chips work in it?

I want to fill the slots up just to have it maxed out...

These were the specs for the R512...would they work here?

(16) 128kx8 Chips (15 ns) / (1) 64K x 8
 
The M-Tech R512 is documented at both Stason and Microhouse with exactly the same info. I would think that if the cache currently installed matches what Stason says it should be then upgrading it with what Stason says should be ok too.

Mixing the cache chips sometimes doesn't work in my trial and errors.
 
That is what I dont think I understand, exactly what cache type stason says..

It mentions Cache and then 256/512/1024/2048, but no TYPE of cache, if that makes sense..

Label
UM61 m 256K-15
9253g r42023

Also, the cache slots are 32 pin but the that are installed are 28 pin...not sure how that works either..

Maybe I am trying to look at this like normal RAM, where there is a type and size that is needed...and I cant find a full manual for the M-Tech R512...is there somewhere else to look?
 
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I'll post the Microhouse info, it lists some chip info for cache.

The 32-pin socket / 28-pin chip is normal, when you max out the cache you will be using 32-pin chips. Pay attention to the dimple on the end of the chip, there will be a dimple or some mark to indicate the dimple on the socket. They need to be be positioned on the same side for chip/socket.
 
I found it...for the Pentium right now:


(8) 32K X 8 STANDARD SRAM, 15 ns, 28 Pin Plastic DIP - (1) 32Kx8 Tag

To Verify, if I want to max it out (which it calls for 128Kx8 or 64Kx8), I need 32 Pin chips correct? Anywhere recommended to pick these up? Does brand matter or just 32-Pin chips?

I have the RAM bought, so this is the last hurdle to getting this bad boy up to max and COMPLETE!!

Thanks for all the help!
 
Smack2k said:
I found it...for the Pentium right now:


(8) 32K X 8 STANDARD SRAM, 15 ns, 28 Pin Plastic DIP - (1) 32Kx8 Tag

To Verify, if I want to max it out (which it calls for 128Kx8 or 64Kx8), I need 32 Pin chips correct? Anywhere recommended to pick these up? Does brand matter or just 32-Pin chips?

I have the RAM bought, so this is the last hurdle to getting this bad boy up to max and COMPLETE!!

Thanks for all the help!
Click to expand...

Make sure when you buy cache you get the correct chip package, it's best to see a picture of what you are getting especially if buying from ebay.
You want the DIP like you listed, sometimes ebay sellers don't describe stuff correctly, I have seen SDIP listed as DIP so be careful.
 
OK,

I have two machines, a 486 (33 MHZ) and a Pentium 1 (75 MHZ) machine,

This is the cache i was going to get:


486
GMB-486UNP MOBO
- Right Now - http://doc.chipfind.ru/winbond/w2465ak15.htm - 4 of these
- Going to Get - http://www.ebay.com/itm/25-IS61LV25...497?pt=LH_DefaultDomain_0&hash=item3f21f15041 - I need 9 of them


Pentium 1 - You know the MOBO
- Right Now - 32K X 8 STANDARD SRAM, 15 ns, 28 Pin Plastic DIP - 8 of these / 1 tag
- Going to Get - http://www.ebay.com/itm/Lot-of-3-CY...302?pt=LH_DefaultDomain_0&hash=item4ce721ef26 - 6 sets of these

Of course if ANYONE has this and would like to sell them I'd be happy to get them from here instead of Ebay...again, thanks for checking for me
 
Those are SDIP, you want DIP

The DIP package is skinny and has legs that plug into the socket, the SDIP is fat with no legs.
 
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Smack2k said:
Thanks.....These more along the right line?

128kx8 - http://www.ebay.com/itm/K6X1008C2D-...606?pt=LH_DefaultDomain_0&hash=item1c2783ba3e
Click to expand...

No, this is 70ns, you want 15ns or 20ns, right package though but slower than you need. Getting closer. Old Thrashbarg mentioned the speed of the chips earlier.

Smack2k said:
64kx8 - http://www.ebay.com/itm/P28F512-150...651?pt=LH_DefaultDomain_0&hash=item3371ed3723
Click to expand...

No, this is a programmable flash memory chip for CMOS.

Smack2k said:
32kx8 - http://www.ebay.com/itm/Sony-CXK582...647?pt=LH_DefaultDomain_0&hash=item35c4125da7
Click to expand...

Now you are just playing with me, right? No, that is another SDIP SOJ fat legless chip. Look at the pic. Please look at my prior post that has links to the type of package you want.


Smack2k said:
Looks like 80 dollars total for what I need....is that an OK rate? I would LOVE to get these from users here, but ebay is the second choice!
Click to expand...

When you find the SRAM cache 32-pin 15ns DIP or SRAM cache 28-pin 15ns DIP that is a possible match just copy/paste and do a google search, there are sites that carry the data sheets for all the chips. It will help to prevent an 80+ dollar mistake. You do not want the SOJ or SDIP packages.

Maxing out the cache ram will not help the performance all that much. I would start out just installing the RAM you already have on the way and get the system up and running, it looks like you already have 256k of L2 cache and that is a good start.
 
Shit...didnt notice the last one was an SDIP...my bad!!

Again, thanks....I am good to go now with what I need....

Will post some more info once I get it up and running...

Thanks for everything man...
 
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