my Pentium Overdrive 83Mhz will arrive in a few days. Considering that I do not have the CPU manual and in my my mainboard is not mentioned, I thought of setting the card as the Intel 486DX266, correct? tnks
What's your mainboard?
AlessandroB wrote on 2020-01-05, 21:49:my Pentium Overdrive 83Mhz will arrive in a few days. Considering that I do not have the CPU manual and in my my mainboard is not mentioned, I thought of setting the card as the Intel 486DX266, correct? tnks
No, not correct. A 486DX2-66 is not the same as a Pentium Overdrive.
Perhaps also post a clear picture of your motherboard.
Check your motherboard manual. Many 486 manuals call it a P24T.
You want a 33mhz bus and you may need to set a jumper to enable the write back cache.
If you motherboard has no direct settings for Pentium Overdrive (P24T), then the next closest setting is 486DX2-66. Specifically P24D variant of the chip also called i486DX2-&EW (P24D).
Basically it means 33 MHz bus, 5V voltage, SL management and WB pins (WB/WT, INV, HITM) wired to the chipset. If not documented/obvious you'll have to use multimeter to find out optimal settings.
But if you share ID or picture of the board there is a chance that a manual or at least jumper settings exists somewhere.
It's simple: if it's a board with socket 2 or 3, it also has jumper settings for the POD, because these sockets were made for the POD. The settings are often labeled as P24T (not to be confused with P24D). If it's a socket 1 or not even that, it's missing the outer row of pins for the POD anyway and you can't (or better: shouldn't) install it.
Looking at pictures of your board I afraid that this thing has no socket for Pentium Overdrive (237 pins P24T). Perhaps that's why P24T isn't mentioned - it wouldn't physically fit. Looks like a 198-pin socket to me, albeit with 3.3V support so you are better of using AMD X5-133 or Cx 5x86 as upgrade chips.
Lol yes, the pentium overdrive does not fit into this socket.
are you sure?? is a very late system... 1996 at least, pentium overdrive is already out in 1996.
Yes. Your socket would need one extra row of pins for the overdrive CPU.
This board, although quite late has not been designed to be consumer upgradable via the overdrive chip. Most likely due to space and power draw reasons. However, as mentioned earlier in Am5x86 & Cx5x86 you have more than adequate upgrade options than the POD.
AlessandroB wrote on 2020-01-06, 14:04:are you sure?? is a very late system... 1996 at least, pentium overdrive is already out in 1996.
The POD wasn't particularly successful, mainly due to its insane high price. So just because a 486 board came out late, it doesn't mean it has support for the POD.
But more importantly: unlike your link is wrong, this is an all-in-one SBC, not a mainboard. These were made for industrial use mainly and are not meant to support consumer-oriented upgrade chips.
100€ wasted, damn!!!!
You can either:
Depending on where you are based, if you look around, you should be able to find a 486 motherboard for a decent price.
Or find someone who will trade your POD for a Cyrix 5x86-100, which has a Pentium core as well (based on the Cyrix 6x86 M1).
jesolo wrote on 2020-01-06, 16:34:You can either: […]
You can either:
- sell the POD and buy a "standard" 486 CPU (like an AMD 5x86) or
- acquire a Socket 3 486 motherboard and sell the PCA-6144V CPU card
Depending on where you are based, if you look around, you should be able to find a 486 motherboard for a decent price.
I already have AMD P75, having this SBC is nice because i use it inside an Amiga 4000, it's not like having a regular Desktop PC case...
derSammler wrote on 2020-01-06, 16:47:Or find someone who will trade your POD for a Cyrix 5x86-100, which has a Pentium core as well (based on the Cyrix 6x86 M1).
There is a Cyrix 5x86 100 for sale on eBay right now for $25 + shipping. (not my listing)
On a side note, when buying older CPUs, it is better to keep watching for a while to find one for a good price.
100€ is way more than I would be willing to pay for a POD83. I've got either 3 or 4 of them and never paid more than $30 for one.
derSammler wrote on 2020-01-06, 16:47:Or find someone who will trade your POD for a Cyrix 5x86-100, which has a Pentium core as well (based on the Cyrix 6x86 M1).
I like the "idea! what the POD was... i have make a tremendous mistake.... expensive mistake... i will keep it, just for the collection reason.
In fact i use a P2 for a retrocomputer and it play really everithing, except the pre 486 games, but i'm not interested in games before DX2 Golden era.
cyclone3d wrote on 2020-01-06, 17:12:There is a Cyrix 5x86 100 for sale on eBay right now for $25 + shipping. On a side note, when buying older CPUs, it is better to […]
derSammler wrote on 2020-01-06, 16:47:Or find someone who will trade your POD for a Cyrix 5x86-100, which has a Pentium core as well (based on the Cyrix 6x86 M1).
There is a Cyrix 5x86 100 for sale on eBay right now for $25 + shipping.
On a side note, when buying older CPUs, it is better to keep watching for a while to find one for a good price.
100€ is way more than I would be willing to pay for a POD83. I've got either 3 or 4 of them and never paid more than $30 for one.
Only 30$?? I payed a lot first of all because i want a unused one (not like the noisy fan) and because shipping from USA is very expensive.
For that price and from China, I would not expect to get a real Cyrix 5x86. The pictures look fishy already, with odd horizontal scratch lines and the text "5x86-100GP" being wavy.
