385387386 wrote on 2024-04-28, 03:18:

CoffeeOne wrote on 2024-04-27, 14:44:

385387386 wrote on 2024-04-26, 23:44:

Glued 6 small heatsinks on the top.

Does it now run at 33 or 83MHz?

33MHz, I try to short the GND dot and Sensor dot with a wire, but it failed to boot. Any way to work around to get 83MHz back? Thanks.

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long p […]
Show full quote

385387386 wrote on 2024-04-28, 03:18:

CoffeeOne wrote on 2024-04-27, 14:44:

Does it now run at 33 or 83MHz?

33MHz, I try to short the GND dot and Sensor dot with a wire, but it failed to boot. Any way to work around to get 83MHz back? Thanks.

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

385387386 wrote on 2024-04-28, 23:31:

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead. […]
Show full quote

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long p […]
Show full quote

385387386 wrote on 2024-04-28, 03:18:

33MHz, I try to short the GND dot and Sensor dot with a wire, but it failed to boot. Any way to work around to get 83MHz back? Thanks.

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

Quake is very CPU intensive (floating point part), but still don't run it with a ISA card, except you are aiming for low values 😉
A 486 machine demands a VLB or PCI graphics card.
A Quake value below 10 for a Am5x86@133 is very low.
A well optimized 486 system with an Am5x86@160 can do 18fps in Quake.

385387386 wrote on 2024-04-28, 23:31:

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead. […]
Show full quote

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long p […]
Show full quote

385387386 wrote on 2024-04-28, 03:18:

33MHz, I try to short the GND dot and Sensor dot with a wire, but it failed to boot. Any way to work around to get 83MHz back? Thanks.

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

Pentium Overdrive PODP5V83 - Detected as Pentium 33 and underperforming - Compaq Deskpro XE

And assemble the realy powerfull heatsink with fan!

CoffeeOne wrote on 2024-04-29, 18:20:

Quake is very CPU intensive (floating point part), but still don't run it with a ISA card, except you are aiming for low values […]
Show full quote

385387386 wrote on 2024-04-28, 23:31:

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead. […]
Show full quote

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

Quake is very CPU intensive (floating point part), but still don't run it with a ISA card, except you are aiming for low values 😉
A 486 machine demands a VLB or PCI graphics card.
A Quake value below 10 for a Am5x86@133 is very low.
A well optimized 486 system with an Am5x86@160 can do 18fps in Quake.

Yes, I'm using an ISA card for test. I'll use a PCI permedia 2 instead.

Babasha wrote on 2024-04-29, 18:51:

385387386 wrote on 2024-04-28, 23:31:

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead. […]
Show full quote

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

Pentium Overdrive PODP5V83 - Detected as Pentium 33 and underperforming - Compaq Deskpro XE

And assemble the realy powerfull heatsink with fan!

Nice guide.

But I short the dots on my POD83, it refuse to boot.

385387386 wrote on 2024-04-30, 08:46:

Nice guide. But I short the dots on my POD83, it refuse to boot. […]
Show full quote

Babasha wrote on 2024-04-29, 18:51:

385387386 wrote on 2024-04-28, 23:31:

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead. […]
Show full quote

Sad. I'll try 25MHz, if it can't run @ 63MHz either, I'll replace a AMD 486 DX5 instead.

With fake cache the POD83 @33MHz only achieve 8.7FPS in Quake test, but still score better than AMD DX5 @133MHz with fake cache.

Why PCChips make those mainboards with fake cache attached? That's ridiculous!

Thanks.

Pentium Overdrive PODP5V83 - Detected as Pentium 33 and underperforming - Compaq Deskpro XE

And assemble the realy powerfull heatsink with fan!

Nice guide.

But I short the dots on my POD83, it refuse to boot.

Is cooling OK?

Babasha wrote on 2024-04-30, 08:59:

385387386 wrote on 2024-04-30, 08:46:

Nice guide. But I short the dots on my POD83, it refuse to boot. […]
Show full quote

Babasha wrote on 2024-04-29, 18:51:

Pentium Overdrive PODP5V83 - Detected as Pentium 33 and underperforming - Compaq Deskpro XE

And assemble the realy powerfull heatsink with fan!

Nice guide.

But I short the dots on my POD83, it refuse to boot.

Is cooling OK?

Cooling fine.

Just bought an other PCChips board. This time no cache any more.

I will receive the board next few days.

I'll try dot shorted POD83 on this board. Maybe M915i bios cause the problem.

Before trying on this board, I'll try dot shorted POD83 @25MHz FSB on M915i first.

CoffeeOne wrote on 2024-04-28, 15:36:

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long p […]
Show full quote

385387386 wrote on 2024-04-28, 03:18:

CoffeeOne wrote on 2024-04-27, 14:44:

Does it now run at 33 or 83MHz?

33MHz, I try to short the GND dot and Sensor dot with a wire, but it failed to boot. Any way to work around to get 83MHz back? Thanks.

I guess it ran then at 83MHz when it failed to boot. It might simply be broken, maybe it was run without a heatsink for a long period of time and now only can run at 33MHz.

EDIT: I would suggest lowering the clock to 25MHz, and then try 25 and 63MHz.

MORE EDIT: I find it interesting that you worry about cache, cacheable area, maximum amount of RAM, and so on. But you have no clue if your cpu works properly.

63MHz Success with short!

I tried to 33MHz FSB again now, it still failed to boot....

OH! I try increase voltage to 4V, 83MHz is back! It works!!!!!!!!!!

385387386 wrote on 2024-04-30, 09:17:

...This time no cache any more.

...unless it comes with / or you buy the proprietary cache stick.

I finally found the roots of the problem, it need the 4 voltage to get 83MHz return, it is so weird, I don't know why, maybe only for M915i.

majestyk wrote on 2024-05-01, 10:17:

385387386 wrote on 2024-04-30, 09:17:

...This time no cache any more.

...unless it comes with / or you buy the proprietary cache stick.

Yeah, I want a cache stick.

Babasha wrote on 2024-04-30, 08:59:

385387386 wrote on 2024-04-30, 08:46:

Nice guide. But I short the dots on my POD83, it refuse to boot. […]
Show full quote

Babasha wrote on 2024-04-29, 18:51:

Pentium Overdrive PODP5V83 - Detected as Pentium 33 and underperforming - Compaq Deskpro XE

And assemble the realy powerfull heatsink with fan!

Nice guide.

But I short the dots on my POD83, it refuse to boot.

Is cooling OK?

Needs 4.0v to get 83MHz, maybe specific for M915i.

Amazing!

Thanks all for help!

Now, POD83 @83MHz running quake at 19.3 frames per second with fake cache.

385387386 wrote on 2024-05-01, 10:29:

Babasha wrote on 2024-04-30, 08:59:

385387386 wrote on 2024-04-30, 08:46:

Nice guide.

But I short the dots on my POD83, it refuse to boot.

Is cooling OK?

Needs 4.0v to get 83MHz, maybe specific for M915i.

Amazing!

Ha! PODP83 is 5V CPU (not 3.3-4V) is't it?!

https://www.cpu-world.com/CPUs/Pentium/Intel- … 20PODP5V83.html
PODP5V83 - where Pentium OverDrive Processor 5V 83MHz?)))