Cyrix MediaGX

[skold]

im trying to find info about the mediagx .. ive found a lot of conflicting info though on a dozen different sites..

so far, heres what ive got.. any confirmation or corrections are appreciated!

2.4 million transistors

.50 to .25 micron (a few sites list .35, some list .45 to .25, one lists .50.. all of the above? my guess is in production, just .35 and maybe .25)

16k l1 cache

speeds from 120mhz to 266mhz (definately 200-266mhz, a few sites list 120mhz parts but those may be ES's.. ill still include them if they existed tho. also, from what i can tell, a 266gp is 266mhz, not 'pr266'?)

super 7 socket? it fits fine in a socket 7 motherboard (so i guess its a super 7 board that i have) ..

66mhz fsb? i was under the impression that super 7 was designed for a 100mhz fsb from the ground up, and ive found info saying cyrix came up with super 7 specifically for the mediagx. so it doesnt seem to fit that theyd design a 66mhz fsb chip for a 100mhz fsb socket?

production dates.. the chip itself is stamped 95-97, ive found dates showing 96-98.. both could be correct tho (designed in 95, produced in 96, updated in 97, still being produced in 98?)

and lastly, if anyone knows the codename for it, thatd be great too. i found references to it on sandpile but i cant find them listed anywhere.

[Mixeur]

They have no PR Rating MediaGX-266 is running at 266 MHz (66x4.0)

Physically, supersocket 7 and socket 7 is the same.

MediaGx 180 has a 60MHz FSB I think.

I don't know where I find this info, but I've listed release date of 200MHz and 233MHz versions in March, 18th of 1998.

[skold]

ah. physically compatible but not electrically?

so in other words i shouldnt try to boot this thing

[Mixeur]

I think it is electrically compatible too. For me difference is just the fsb : socket 7 motherboard cannot have a fsb100

[skold]

but socket 7 can have a 66mhz fsb, so what would be the difference?

socket 7 boards wouldnt have that companion chip the mediagx uses...

so would it just function like a normal socket 7 chip without all the mediagx bells and whisltes?

[CPUShack]

MediaGX does NOT have a 66MHz FSB

MediaGX is ran on a 586 core.

the bus speed is 33MHz, this is what clocks all components, memory runs at 1/3 of CPU speed. This means memory can be clocked from 44-111MHz. THe MediaGX 180 and 150 uses a 30MHz bus.

http://www.cpushack.net/MediaGX.html

[Minuteman]

Hum, doesn't look socket-7 compatible:
MediaGX:


MII:


Look in the corners...

[chipcollector]

I think you should change the picture of the MII, but this time you should rotate it one side to the right. Now look

[Minuteman]

[skold]

ok, so a 33mhz bus

is it super 7 or what? it DOES fit in socket 7 (i know this firsthand)

[CPUShack]

socket 7 mechanicly only.

Note on the MII:
Not ALL socket 7 CPUs have all of the normal pins.
The onternals rows are additional pwr and ground pins
that are not used on all chips.
K6's use them, some MIIs do, some dont
overdrives use them..etc.

[CPUShack]

[skold]

so is it 'socket 7' or '321 pin pga'

heh

[chipcollector]

skold do you have any Cyrix GX chips? I heard from very reliable source that they don't put ES on them, but stamp on the bottom left or right with a II, laser inscribed.

[skold]

i have one at the moment

http://www.cpudb.com/imgs/cpus/cyrix/mediagx-f.jpg

it says ES pretty clearly at the bottom. its very small and faint, i actually didnt know it was an ES until i scanned it; i couldnt even read it, and i justr saw some sort of 'block' image at the bottom.

i dont think its fake; if someone was going to stamp ES on a chip to 'make it worth more' theyd probably have done it a lot more obviously.. larger, more bold, perhaps saying ENGINEERING SAMPLE instead of just 'es'