The DX2 has 5 Volt, the DX4 has 3.3 Volt. Are you sure your system supports 3.3 Volt processors?

Disruptor wrote on 2024-02-09, 20:15:

The DX2 has 5 Volt, the DX4 has 3.3 Volt. Are you sure your system supports 3.3 Volt processors?

I am not sure, no. The bios detects it.

LaC wrote on 2024-02-09, 22:31:

Disruptor wrote on 2024-02-09, 20:15:

The DX2 has 5 Volt, the DX4 has 3.3 Volt. Are you sure your system supports 3.3 Volt processors?

I am not sure, no. The bios detects it.

I won't rely on that.
It's you who perhaps has a toasted DX4 then.

If I was you I'd either look for a power transistor like a 1085 or 1086 or a multimeter.

Those HP computers are notorious for being build as cheap as possible. So a 5v cpu means doet for 3v cpu cost more. When stelling computers in thousands, the few dollars saving make sense so it is quite possible the system does not support the DX4 out of the box but the bios is prepared for an overdrive or voltage converter.
My ibm Valuepoint just the same, my Compaq XE as well.

Disruptor wrote on 2024-02-09, 23:05:

I won't rely on that. It's you who perhaps has a toasted DX4 then. […]
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LaC wrote on 2024-02-09, 22:31:

Disruptor wrote on 2024-02-09, 20:15:

The DX2 has 5 Volt, the DX4 has 3.3 Volt. Are you sure your system supports 3.3 Volt processors?

I am not sure, no. The bios detects it.

I won't rely on that.
It's you who perhaps has a toasted DX4 then.

If I was you I'd either look for a power transistor like a 1085 or 1086 or a multimeter.

You're saying I might've fried the dx4 due to overvoltage?

LaC wrote on 2024-02-10, 00:10:

You're saying I might've fried the dx4 due to overvoltage?

dosis sola facit venenum

Yes you might have fried the DX4-100 but maybe not, depends on how long you had it powered up. Did you look for docs on your HP to see if you needed to change jumpers for a DX4?
From the Maint manual I see no method to change cpu voltage so the only "factory" considered cpu replacement would be a Intel ODP with onboard regulator.
You also could try a "interposer" and a DX4....

waterbeesje wrote on 2024-02-09, 23:59:

Those HP computers are notorious for being build as cheap as possible. So a 5v cpu means doet for 3v cpu cost more. When stelling computers in thousands, the few dollars saving make sense so it is quite possible the system does not support the DX4 out of the box but the bios is prepared for an overdrive or voltage converter.
My ibm Valuepoint just the same, my Compaq XE as well.

yup looks like it only supports Pentium Overdrive 83mhz.

https://web.archive.org/web/20030108133102/ht … /2bpv01951.html

Hmm it should support the ODP Intel DX4-100 (DX4ODPR100) as it is a drop in replacement for a DX33 or DX2-66, but finding one cheap can be a problem 😀

This might not sound like much of an improvement, but later model DX2-66's exist with Writeback L1 cache.

Any with the code "&EW" in the part number, and I think all DX2-ODPR-66 are write-back.

MikeSG wrote on 2024-02-10, 05:49:

This might not sound like much of an improvement, but later model DX2-66's exist with Writeback L1 cache.

Any with the code "&EW" in the part number, and I think all DX2-ODPR-66 are write-back.

Nope.
All DX2-ODPR-66 are write through.

Horun wrote on 2024-02-10, 05:00:

Hmm it should support the ODP Intel DX4-100 (DX4ODPR100) as it is a drop in replacement for a DX33 or DX2-66, but finding one cheap can be a problem 😀

yeah I think you get more bang for your buck with a Pentium overdrive. For some reason these demand a premium.

LaC wrote on 2024-02-10, 16:49:

Horun wrote on 2024-02-10, 05:00:

Hmm it should support the ODP Intel DX4-100 (DX4ODPR100) as it is a drop in replacement for a DX33 or DX2-66, but finding one cheap can be a problem 😀

yeah I think you get more bang for your buck with a Pentium overdrive. For some reason these demand a premium.

The Pentium Overdrive is even more overpriced than the DX4ODP-100.
But of course, if money does not matter, then go for the Pentium Overdrive.
More bang for you buck would be (most likely) an 3.3V Adapter socket and a Am5x86. But it's not clear, if this is fully supported by the Bios. On a Asus SV2GX4 the multiplier 4 of the Am5x86 does not work, if your bios version is 3.xx or older.

CoffeeOne wrote on 2024-02-10, 16:58:

The Pentium Overdrive is even more overpriced than the DX4ODP-100. But of course, if money does not matter, then go for the Pent […]
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LaC wrote on 2024-02-10, 16:49:

Horun wrote on 2024-02-10, 05:00:

Hmm it should support the ODP Intel DX4-100 (DX4ODPR100) as it is a drop in replacement for a DX33 or DX2-66, but finding one cheap can be a problem 😀

yeah I think you get more bang for your buck with a Pentium overdrive. For some reason these demand a premium.

The Pentium Overdrive is even more overpriced than the DX4ODP-100.
But of course, if money does not matter, then go for the Pentium Overdrive.
More bang for you buck would be (most likely) an 3.3V Adapter socket and a Am5x86. But it's not clear, if this is fully supported by the Bios. On a Asus SV2GX4 the multiplier 4 of the Am5x86 does not work, if your bios version is 3.xx or older.

Where do you get the adapter sockets?