LGR 486 Update! 83MHz Pentium Overdrive CPU

LGR 486 Update! 83MHz Pentium Overdrive CPU


[“All the Good Things” by Nocturnal Spirits plays] Greetings and welcome to a
LGR Woodgrain 486 upgrade thing! And today, we’ve got the Intel
Pentium Overdrive Processor. “Makes your Intel 486
Processor-based PCs run faster.” Which is great, ’cause
that’s what I wanna do! Yeah, we’re gonna take the
Woodgrain 486’s AMD Am486 CPU that’s in there, running at 66 megahertz and turn it into a Pentium, of sorts. It’s kind of a weird thing,
you know, it takes a 486 and makes
it an 83 megahertz Pentium. Yeah, bit of an odd
frequency rating there, but that’s what Intel was doing, man. In the mid-90s they had all sorts of interesting Overdrive chips. And this one in particular
just attracted me to it. Yeah the PODP5V83, [chuckles] you know ’cause of
the weird rating 83 megahertz. And I’ve just never
messed with one of these Pentium Overdrives before, just 486 Overdrives
that take like a 486, 33 and turn it into a DX4-100 or whatever. And perhaps that would be more suitable for the Woodgrain 486, but
I’ve got this one here, complete in-box, it’s been sitting in its
sealed packaging for 25 years thereabouts. It was originally
launched in October 1995, maybe early 1996, depending
on where you look. But, back then it was $299 US dollars for just this upgrade chip, and that’s the equivalent of around $500 adjusted for inflation, so a bit pricey for just a CPU upgrade to the point where they
didn’t last on the market for too very long. And there were a log
critiques in the media about it being just being like, who the heck is this thing for? Average consumers found it too costly and businesses would rather
just get a new system. One IT guy was quoted as saying, “both a memory and hard
disc upgrade made sense “alongside a Pentium, “so if you do one, you have to all three. “And if you end up doing all three, “it’s just cheaper to buy a new system.” So, yeah I mean, all good points, I totally give all the points
to their logic. [laughing] But man, Intel was pushing
all the things it could do, I mean look at all these
software benchmarks, you know. 135%, 144%, 267% better in some programs, oh wow. Need help in selecting which one you need? I mean, look at all these things that you can do on the website. And yeah they had a website, you could go out on the web, the cyber spaces and you could
go and download this PDF, seriously, I did, it’s
still on archive.org. Yeah, the Intel Pentium
Overdrive Processor performance report. It’s 30 pages of like, just benchmarks and how cool it is to use
this thing in your 486 and there’s so much going on man. I don’t know, I don’t
really, I don’t know man. I just wanna play Duke Nukem 3D and Descent II and stuff. But, there were a lot of
serious people look at this and making paperwork. [laughing] Anyway, let’s go ahead
and get this unboxed because I’m curious what’s inside. [smooth jazz] Oh, the box itself is glued to itself. Actually looks like this
one was made in 1998. February 13th, wow that’s
almost exactly 22 years ago on the day I’m recording this. Okay, maybe they were on the market a little bit longer than I’ve read. I read they lasted through 1997, ’98 would have been pretty late to get an 83 megahertz Pentium. [laughing] They did not make that easy. Ooh, fresh Pentium Overdrive. No Bachman Turner included. Look at that. Yeah this was one of those, I believe, the heatsink
is permanently attached and there is a replaceable
fan clipped to the top, but, yeah they were serious
about the cooling on this thing. Just as an example, my AMD486 that’s in there right now does not require any cooling at all, it’s a 3.3 volt CPU, so it’s never had a
heatsink or fan or anything. But this, yeah they’re like “it’s 5 volt,” “it runs hot or whatever” “you just gotta make
sure it’s nice and cool.” Gotta wonder about the thermals in between the CPU and the
heatsink, but we’ll see. Let’s see here, wonder what we got, oh man. So we got a Stay In The
Loop registration card, the beginning of a valuable
relationship with Intel. Just what I’ve been looking
for around Valentines day. And we have the, wow this is
not something I was expecting. “Overdrive Processor
Demonstration and Diagnostics.” Okay. We’ve got a little
remover tool of some kind. Intriguing. And some paperwork. “Attention, Packard Bell systems,” oh dear, what now. “Serial numbers 450 and 470
require additional hardware.” Okay, we’re not putting
it in any of those. Yeah quick installation. I mean, yeah, pretty simple. Pretty pretty simple. It’s just a drop-in thing, man. Got some jumpers if we need, I guess a diagnostics
disk to check things out, that’s cool, I’m glad it comes with that. Lets see if the manual says
what to do with this doohickey. Oh, there’s an animated
demo, that’s gonna be good. Ha ha, I like animated demos. Okay, so that’s what that’s for, removing the processors from
the socket with no handle, haven’t seen one of those in a while. Not in a 486 anyway. So yeah, ah yeah, that makes sense. You got the little groves there, fits between the pins. Dang that’s cool, glad I have one of these, I’ve had some trouble pulling things out of like a 386 before. [laughing] so, yeah anyway, the
rest of this just seems to be generic. Ah, we’ve got a datasheet, how nice. Although I already looked
up all this stuff online, but yeah, check it out, man. This is something I’m
pretty excited about, 16K of code cache, and 16K of write back capable data cache. The AMD that I have in there right now is only 8k of L1 cache. Still no L2 on board, that is on the system board itself. I have 256k of L2 on that motherboard that we upgraded to in the past because didn’t have any L2
when we first did the build. But, yeah, this should be
quite the lovely thing. Ha, that is fresh. Look at this thing. That’s just so clean, so nice. And check out that integrated fan, heatsink cooler design, man,
it is all clipped on there. Looks like the fan could come off, but I mean that heatsink is
pretty thoroughly attached. And I like the fact that it looks like it gets the power
straight through the pins. There’s no connector for
a fan to the motherboard or Molex or anything like that. This is exciting man, ah dude, it’s not gonna be a 486 anymore, it’s gonna be the LGR Woodgrain Pentium, that’s weird, oh I don’t
know if I like that, I didn’t think about that. [laughing] Well, anyway, this seems like a pretty
clear upgrade on paper. Will it be 100+ percent
better like Intel claimed? There’s only one way to find out, that is get this thing set up and try out some benchmarks
and games and stuff. Alrighty. Let’s just get the old
AMD one out of there. Well, the new the CPU is old as well, but you know what I mean. There we go. Oh, poor AMD. Still a good CPU, maybe I’ll go back to it at some point, but not today! All right. And now our drop-in replacement. Okay, so I guess with socket three we don’t have exposed pins, unpopulated pins around the edges. I think that might just
be with socket two, you have like an extra
row all the way around each of the four sides. Okay. Well that’s that part out of the way, now it’s time to get to
everyone’s favorite part about old computers, all the jumper settings. So there’s quite a variety
of different things that this particular motherboard supports, but what we’re looking
for here is this P24T. I believe that is the Pentium Overdrive code name or whatever. All right, so JP9 should
be on one and two, it is. JP10 should be two and three. Okay, that is that one, now I gotta worry about all these. Okay, JP13 should be one and two, there’s nothing on JP13. So we will just add a jumper down there. [groans] There we go. JP23 needs to be on three, four, five, six, and seven, eight. [upbeat music] Okay, I think this is the last one. [laughing] All right, gonna triple quadruple
check everything here. According to my list and hey if everything checks
out we’ll plug everything in, power it on, see what happens. All right, everything’s
set up, ready to go, installed, whatever, we
just gotta get this on here and see what that’s about. But just power it on and see what happens. [computer whirring] Hm, sounds a little different. There is a CPU fan going. [laughing] Didn’t have one before this. Thankfully it’s not too loud or grinding or anything. Hey, check it out, so P24T, 80 megahertz,
close enough! [laughs] we’ll run a CPU check here in a second and see how that goes. All right, so yeah. Intel Pentium 83 Overdrive, 83 and a half megahertz, indeed. 2.5 clock multiplier,
bus speed 33 megahertz, everything looks as it should. Yeah, the internal cache is
probably not gonna do everything because I don’t believe I
have write through mode. So I may just have the
16 out of 32 possible K on the chip itself. It’s only gonna be write
through for the internal cache, which means we’re not
gonna get the full 32K. We have 16K of the cache on L1, L2 is write back, that’s cool. Not game-breaking, but worth noting, this motherboard isn’t
the most powerful thing to pair with a Pentium. All right, so let’s try
Top Bench, really quick. Because I want to. And also because when I ran it before, back when we installed the
external cache down there, 256K, we were getting around 190, actually it looked just like this here, ’cause that’s just what
this is. [chuckles] So, around 190 points you
can see in the top left there is just running in real time. So if you run the benchmark
in real time here, we should be, yes, it’s a bit faster, 218. So equivalent-ish of, well
it’s going back and forth, Pentium 75 clone or thereabouts. Let’s see what it is with turbo. Nice okay, so turbo still
cranks it down a good bit. Like a 386 DX40, not nearly as slow as it is with that 486, but we can disable the
external cache and other things if we really wanna get super slow, if we’re playing certain older games, but yeah, around 218, 219, not bad, not the biggest jump though. I was hoping to get around 240 or 50, but again this motherboard
just isn’t the best thing for the time. Still, an improvement nonetheless. I mean, it is working right? So here’s something else I’ve
got another benchmark on here this 3D benchmark. Let me show you what it was with the 486 that we had in here previously, this is more of a test of
VGA capabilities and whatnot, but you know should still
be faster with a Pentium, so with the 486 ended up
getting a score of 47.1 or run it with the Pentium here and see what we get. Should certainly be faster, I’m not expecting a ton faster, ’cause again, we need to
upgrade the video card and whatnot to make more
of an improvement to this, I believe. 55.7, okay. Just out of curiosity, I’m
gonna run cache check here and I’ll just have it check the cache. I’m curious about that L1, if there really is, just
getting a 16 of the 32. Oh, that’s the results. So, yeah only 16k of L1, but man that’s like two or
something times the speed, maybe three times, it is a lot faster than the 486 one was. Plus it’s got all sorts
of floating point stuff and Pentium things. It is a clear improvement so let’s just go ahead and
try this Overdrive processor demonstration and diagnostics disk. So there’s a Windows version. I don’t wanna do that. Ah, it’s got a fan
monitor, how cool is that, and DOS, I like it anyway. All right, install all the things please. Listen to the sound of my disk. [floppy drive noises] All right so we’ve got some demos, we got a fan monitor, let’s just see what that looks like. [laughing] It’s on. [laughing] No RPMs, no anything, it’s just “on.” Okay, let’s try this. The actual program itself! Mm, got a mouse. I don’t know what kind of
weird resolution this is it is bowing on my monitor and I don’t feel like fixing it. Let’s see if there’s any different. It’s the same thing! Just says whether or not the fan is on. Review installation demonstration. Whoa, [laughing] Oh, that’s so cool, man. The dithering! I am gonna capture this
on the capture device for posterity really quick, hold on. All right let’s start that over ’cause it’s worth it. Look how awesome that looks. I mean, I hope it looks good to you. Or else I’m just going crazy. Being a weird old man. [laughing] this, ah, I love these
kind of little things. Look at those hands. Dude. Animations. [laughing] Oh, those are phenomenal looking
pixels on the motherboard and there all the little details, dude, somebody put some
real, serious time into this. Intel, man, they didn’t hold out. Oh, look at that, look at the
little removal tool graphic. [laughing] Oh that is so cool, aw look at that. That’s enough of that, if you wanna see the rest of it, you can see the download
in the video description for the disk and take a look. Anyway, let’s run the
processor instruction test. Oh man, wow. I’m assuming that that is legit and it’s not just running numbers in an animation. [laughing] All right, that’s pretty cool. Floating point conformance test. Oh that’s my kind of test right there; I love conforming to floating points. Doing some math, just
calculating tons of things, man, the power of the Pentium. Look at it go. All right well that’s all for that. Didn’t really do a whole lot other than show me some
really cool animations and some numbers that I am going to trust that were real. Right, let’s run some games. I mean, we gotta try to do it 3D because it ran like
total crap before this. I mean, it’s probably still
gonna run like crap to a degree, but let’s make sure everything’s good. 320 by 200 normal mode, we’re not even gonna mess
with VASA compatibility. But if you’ll see the footage here of how it was running on the 486, that we had before this, this is just the first
level of the first episode. And you can see it hangs
around 10 frames per second just at the beginning. And it goes much lower down into the single digits and whatnot, throughout the rest of the level. And it’s not great. This is again, 320 by 200 and it’s just rolling along,
chugging through the game, it’s not a pleasant experience, mostly single digits. But now we’re gonna try it on the Pentium and man it’s already loading much quicker, so that’s good. [explosions]
Nice. [8-bit music] – Let’s rock. [game character speaking] [laughing] – Well, it is nominally better, we’re getting low teens up there. So that’s the frame rate
more or less right now. Ah, you know.
[gunshots] It’s faster but again, there’s only so much we’re
gonna be able to squeeze out of this system
considering the other things that are installed in there like the video card. It’s certainly more playable though, that’s for absolute sure. Not as good as I could
be, but I’ll take it. Time to die. If I were spending the
equivalent of 500 bucks on this back in the day for
games or whatever like this, this would not be the
most satisfying thing. There’s other bottlenecks that I think are making
much bigger of a difference in terms of games like Duke 3D. Let’s try Descent II. Because that’s another one that
just ran like total garbage on the 486, let me show you what that looked like, here’s some direct capture of Descent II on the 66 megahertz AMD CPU that I had in here before. And again, single digits. Low teens. A little better than Duke 3D, but yeah, not great. Even when cranking down the settings. This is the highest settings here, but if we crank the detail
all the way down to the lowest it’s you know a little better, you get a few extra frames here and there. I mean, I would have played
this when I was a kid. [laughing] It’s just such a cool game that I wouldn’t have cared. But, this is not great nowadays, that’s for sure. And low detail, mid-high detail, whatever, it’s all pretty sucky. So. [rhythmic music] moving over to the Pentium. Let us see how this goes. [upbeat music] Looks better. Let’s turn on the frame counter. So, okay yeah, I mean that’s, again, pretty clear improvement. Oh, much more playable. [lasers firing] Not great, still dipping into the
single digits here and there but not nearly as much. And again this on the
highest detail setting. [lasers firing]
So, that’s a red door, what am I shooting for? [lasers firing] Yeah, you know. [lasers firing]
[laughing] Can’t handle all the action. [lasers firing] Let’s see what it’s like
with the lowest again. [upbeat music]
[lasers firing] Nominally better, you know like it was in the 486, but, I mean honestly this is
about how I played Descent II for the first time back in the day. It was on a Pentium 90 I believe. So it was maybe a little
quicker than this, but… [laughing] Oddly nostalgic in a way. But just really the
whole point of this build is not to make the fastest
486 or early Pentium, just I’m experimenting with parts and seeing what things do. Because now I can. [laughing] It’s fun. All right one more thing
that I wanna try here and that is Quake because it didn’t work whatsoever, but we’re gonna try a benchmark. The venerable Phil’s
computer lab benchmark shout out to Phil for these handy programs and things you can
download on his website. So we’re gonna run the Quake time demo, just the normal one. And again, this did not
even run at all on the 486. I mean it tried. Well, this doesn’t either. Let’s try one of the other ones. Lower the resolution, I believe. Nope. Okay, a clean boot here, let’s see if it does anything different. Nope. That totally doesn’t wanna work. Let’s just try Doom, see if that does anything. Max details. [laughing] I didn’t run this on the 486, so I don’t really have
anything to compare it to, but certainly looks like
it’s running a bit smoother than it did on that CPU, just looking at it. All right. 2134 gametics. 2664 realtics. Those… are numbers. Again, I don’t have
anything to compare it to, unfortunately. Man, that sucks I couldn’t even get the Quake time demo to work at all, man. [Windows 3.1 Startup Sound]
[LGR humming along] So final thoughts on the
Pentium Overdrive Processor 83 megahertz, for now anyway. It’s unfortunate that it’s connected to such a computer! You know if it was a more capable machine, we would be getting more
of the capabilities of it. You know, it’s a weird conundrum. I was reading about that in the reviews, its contemporary reviews back in the day. People were like, just again, questioning who exactly
is this for because the faster your system
is the better it is, the newer it is, the better
capable your 486 board it, the more you’re gonna get out of this. The older it is, the less
you’re gonna get out of it, it’s like backwards. You know, the people with
the slower, older systems, don’t get as much out of the upgrade as the people with the
newer, faster systems that are already newer and faster, so… Yeah, I much rather have a
486-DX4/100, stick that in here, or maybe even one of
the AMD P75 or something you can overclock and do cool things. Maybe I’ll try that in the future. And I also do wanna
try with messing around with different VLB compatible cards, like some different video cards. And memory as well, I wanna try to maybe some faster memory, because I think that would make
a good difference, honestly. Got I think that’s a bit of a bottle neck. Anyway, all sorts of things
to mess with on this 486 and [laughing] that’s why I have it. It’s just, yeah, screwing
around with configurations and things that I never
could back in the day. Wondered about them. I’ve always been curious
if they’d been any good ever since diving back into the hobby as an adult and yeah it’s like, I don’t know it’s just fun. I love messing around with these things. [arcadey sound effects] And I love Missile Command. And my camera battery just died, so I guess that’s the end of the video. I mean, it pretty much was anyway, I was just wrapping up, so right, if you enjoyed seeing this then do checkout some of my others in the 486 updates, upgrades series or whatever else I post here each and every week on LGR. And as always, thank you
very much for watching!

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