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Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-26, 10:17

in Milliways

in Milliways

I do not like to argue with anyone if he uses rude expressions and does not present arguments quietly. It is about arguing reasons why an FX processor is so expensive today and if that price is really justified, and I have commented on that line. Based on my twenty-four year experience in a computer …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-23, 20:05

in Milliways

in Milliways

Motherboards for AMD have a long history of being poor compared to Intel's in all the mid, low and high-end range. An example from a long time ago would be the GA-7DXE, AMD760 north bridge and VIA 686b south bridge to save costs since AMD's south bridge was more expensive. In motherboards for AMD, …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-23, 09:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does anyone have experience on undervolting an 486? Because if all goes well I will have four voltage options that I'll can choose according to the resistors I use. Personally, whenever I use a component at its standard frequency, I like to look for the minimum voltage at which it is stable. I would …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-21, 21:31

in Milliways

in Milliways

No, AMD had some presence in OEM (multiple examples above), which is sustainable business model. But as I've already mentioned, they had to significantly scale down pricing and expectations after Celeron release. With FX release things got really dire, due to very weak presence in OEM and nearly …

Re: M.2 NVMe working on old school regular pci

Posted on 2021-10-21, 21:10

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think I mentioned that the problem is that these seem to run in some kind of pio mode when used on these old systems. I was literally getting kbps out of it, it was dreadfully slow. Totally ruined any thoughts of it’s usefulness. The fastest thing I have found for old systems is this: promise tx4 …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-21, 21:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am going to have to buy all the components in China since the shipping costs of the large online stores are an insult to intelligence, and they do not have the MIC29302WT that I need in stock. For this reason it will take a long time to start the tests. I guess about a month, which is usually …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 22:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Let's see. What's the current through the CPU? Power=Current * Voltage (P=IV). Max power is 5.22W and Voltage is 3.3V, so current = 1.6A (on average). So the first thing is that the regulator needs to be able to supply that. The 29152 datasheet says max current of 1.5A. So that could be a problem, …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 20:44

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So if the 486 dx4 100 consumes 5.22w maximum (cpu-world) and the mic 29152bt can give 3v3*1.5 around 4.95w, something is wrong. So I'll need the Mic 29302, right? What power rating for the resistors? Most ones I've seen are 400mw, is this low? But I'm not used to this, and I'm having trouble to find …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 19:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks a lot for the clear explanation about the precision resistors.:) Back then, I left it because I really didn't know what I was doing and of course didn't want to damage the board. And what embarrasses me the most today is that I think I measured the voltage on the wrong pins of the socket, …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 18:25

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So everything depends on the resistor's value and I need to follow the traces that go from the jumpers to the resistors if I understand it well and use a 94.5k resistor in one place to have the 3.3v, maybe ignoring the 4.02v resistor and using the odder ones may be the best. And the resistor right …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 14:30

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The blue resistors are called precision resistors with a tolerance of 2% or less, they aren't common but not hard to find, expensive if you compare it with general purpose resistors. Back then I tried with a trimmer because in the board manual of the ver 2 there are ten pins on the voltage select …

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-18, 17:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here is the BIOS dump. Bios string 40-E301-001116-00111111-121593-UMC498-H In the photo I can't read the model of the voltage regulator, maybe the resistors color but no the model of the MIC, thanks.

Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-18, 10:09

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have to look for that computer in the heap, I'm sure it's there. I left it after testing the stability at 40Mhz and 5v. I did not want to risk damaging anything more since without realizing it had been running at 5v for some time. As I already said, my level of electronics does not go beyond …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-14, 13:42

in Milliways

in Milliways

Ehhh, Even the Geforce FX 5950U is CPU limited in 3DMark 2001 with a Core2 X6800 below 3.2-3.3Ghz. If going for a PCIe setup for XP, the ideal would be whatever the latest you can get XP drivers for as far as the motherboard goes... Probably an LGA-2011 with a Xeon 1680v2 or so along with a couple …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 18:28

in Milliways

in Milliways

Sorry for the missunderstanding, I asumend that The serpent ridder was talking about the k6-2 and k6-3 because I've never seen a k6. I have two k6-2 computers and back in the day had a k6-2 400 on a soyo sy-5ema+ with 2mb cache. So nothing against the k6-2. Of course a K6 can't be compared to a P3. …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 16:28

in Milliways

in Milliways

K6 (K6-2) Who needs efficiency? We can push Mhz and rely on SIMD to fix weak FPU. Pentium 4 Who needs efficiency? We can push Ghz and rely on SIMD to fix everything else. Bulldozer Who needs efficiency? We can push Ghz and rely on general-purpose computing on GPU to fix everything else. That's a …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 15:57

in Milliways

in Milliways

The Pentium-3 was released some 2 years after the K6, so hardly a fair comparison... Wikipedia says that the k6-3 and the PIII katmai where launched on the same month. and cpu-world also list the K6-3 Sharptooth core and PIII Katmai core,as launched in February 1999. And the coppermine core was …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 15:09

in Milliways

in Milliways

Anders- wrote on 2021-10-13, 15:07: Old gen cpus lack in the performance department? Not a very big surprise there, they all do 😁 I was thinking in the performance against PII and PIII.

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 14:59

in Milliways

in Milliways

*cough cough* K6 Yes, K6 cpus are also overpriced I think and their performance is.... just leave it in a bit low, but the platform is interesting to play with. It has so many quirks and faults, that it becomes interesting. And AM3 CPUS aren't the best for XP, they doesn't have the best IPC of the …

Re: Prices on AMD FX8xxx and lower series (socket AM3+) - what is going on here ?

Posted on 2021-10-13, 14:09

in Milliways

in Milliways

are not real eight core cpu on the strict meaning of the "core" word. There's no standard which defines that each CPU core must have floating point unit. True, That article explains what I tried to say much better than me, but reading between lines, it explains how the definition of "core" used in …

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