Re: PSU - bust the myth

Posted on 2017-04-11, 13:16

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The GTX 480 alone draws about 320W @ full steam . About whole system draw: https://i.imgbox.com/MTNl8Vw9.png http://www.tomshardware.com/reviews/geforce-gtx-480,2585-15.html ^ That's grinding Furmark on a X58 i7-980X system, i.e. worst case scenario on a rig hungrier than yours. Thus any decent 550W …

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Re: PSU - bust the myth

Posted on 2017-04-10, 00:30

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

gdjacobs wrote: ... I wouldn't sign off on it until seeing what's used to switch the 5VSB rail! I can tell from the second pic that it uses the dreaded 2-transistor scheme.

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Re: PSU - bust the myth

Posted on 2017-04-09, 22:53

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Project1: - Slot1 Pentium (400mhz normal, or 1400mhz slotket) - 2 hdd (ide or sata w/adapter etc) - 1 or 2 optical drives - 2 floppy drives /or combo 3.5+5.25 - vga card, pci or agp (max GF 4600) - 2 ISA soundcards, perhaps 1 pci - some other PCI utility card(s) - a couple of ram sticks ^ That's …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-30, 16:38

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

... From your commentary, it sounds like aluminum polymer caps are fine for just about everything non-PSU related? ... Nope, just in the context you asked for, i.e. replacing lythics on motherboards . ... It was commented that using larger voltage-rated electrolytic capacitors disipate heat more …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-30, 10:50

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

... what you think about using 100 uF, 220 uF, and 470 uF niobium oxide capacitors as replacements for electrolytic caps in motherboards. The ESR is not nearly as low as the values a poster just presented, but the spec sheet claims they are "low ESR" - 100 m-ohm, 400 m-ohm, 75 m-ohm respectively …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-29, 22:56

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

... if they fitted 25V, it was for ESR rather than voltage ... For the same can size (diameter x height), the higher the voltage rating, the lower the capacitance. ESR remains more or less constant. Example, Panasonic FC 10 x 25mm. 10V: 1500uF 0.045Ω 16V: 1200uF 0.045Ω 25V: 820uF 0.045Ω 35V: 560uF …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-29, 20:48

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You don't need to be a MIT graduate to solve this puzzle. Gigabyte used general purpose high-ESR 25V GSC craps just because they could (ancient mobos were more tolerant of crappy caps than modern ones). The reason: they were cheaper than better quality low-ESR 10V stuff = more profit from each mobo …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-29, 16:53

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thinking about it, as a matter of fact in an ancient mobo like the GA-5AX after tracing them you'd probably find that most caps are being fed +5V tops. So 10V or even 6.3V rated caps would work OK, in some positions at least. The 25V rating of the originals tells me that Gigabyte just used general …

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Re: Recapping GA-5AX v5.2 with solid capacitors

Posted on 2017-03-29, 16:29

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

16V poly caps will be OK, all they'll have to endure will be +12V from the PSU. In the particular case of replacing CPU VRM lythics with polys you can even lower the capacitance and go away with it most of the time. But better if you can replace with polys of same or higher uF and lower ESR. The …

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Re: Old laptop batteries

Posted on 2017-03-29, 12:29

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've seen things you wouldn't believe ... McBooks burst open courtesy of bulging batteries beyond the Tannhauser Gate ...

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Re: Fan noise - how much dB do you consider acceptable?

Posted on 2017-03-29, 12:06

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

... fan noise is pretty ignorable for me as long as the computer is on the floor. My main desktop is a fairly loud machine but I hardly notice because it's down by my feet, plus the desk is a bit of a barrier that I think further dampens or redirects the sound ... ^ Yep, not having line of sight ( …

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Re: Fan noise - how much dB do you consider acceptable?

Posted on 2017-03-28, 14:44

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I do like a quiet PC. I'm always replacing fans in my retro PSU's and video cards, and looking for the cases and CPU heatsinks with the largest possible fan diameters. Manufacturers' dB ratings don't really mean much ... ^ This. It's all about subjective psychoacoustics . Couple of illustrative …

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Re: Possible problem with an old AT Power Supply Unit?

Posted on 2017-03-23, 09:15

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

All or most of the smaller caps are Rubycons, that's why this PSU is still alive @ 2017. The three larger PCE-TURs close to the yellow 'donut' coil are probably busted, from a distance they look like two 10V 2200uF on +5V and one taller 16V 2200uF on +12V. Also replacing the two bulk caps ('Nitsuko' …

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Re: PSU delayed start - is this normal?

Posted on 2017-03-22, 11:15

by

by TELVM

in Milliways

in Milliways

So 'ErP ready' needs to be disabled for the PSU to behave. Group-regulated PSUs, even good ones like the S12-II, can't really cut it anymore with modern hardware. That's why the best brands are moving to DC-DC designs even for the bottom of their lineups ( Seasonic will replace the S12-II in the …

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Re: AMD drops the mic

Posted on 2017-03-22, 10:55

by

by TELVM

in Milliways

in Milliways

Speaking of games: http://www.techspot.com/review/1360-amd-ryzen-5-1600x-1500x-gaming/ "... With the exception of Far Cry Primal, it looks like the quad-core Ryzen CPUs will destroy the higher-end dual-core Kaby Lake processors such as the 7350K. Even at 4.8GHz, the 7350K was no match in the more …

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Re: PSU delayed start - is this normal?

Posted on 2017-03-21, 20:30

by

by TELVM

in Milliways

in Milliways

... I went ahead and changed the "ErP Ready" setting to "disabled", where it was previously on "Enabled (S4+S5)" - now the computer turns on without a hitch ... ^ Sounds like we might be on the right track. However disabling the whole 'ErP Ready' lot sounds a bit drastic (no more S4 hibernation, …

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Re: OLDTIMER 2017.

Posted on 2017-03-21, 07:47

by

by TELVM

in Milliways

in Milliways

... have fuel octane changed much since 1917? If you're intested here's some hardcore pr0n: http://journal.frontiersin.org/article/10.3389/fmech.2015.00016/full To give you an idea, in 1917 the famous Red Baron's Fokker Dr.I triplane Oberursel rotary engine used ~70 octane (R+M/2) fuel. However as …

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Re: PSU delayed start - is this normal?

Posted on 2017-03-21, 07:12

by

by TELVM

in Milliways

in Milliways

Try resetting CMOS by removing CR2032 battery for a while with PSU unplugged from wall, this may help. Though solidly built the S12-II uses a simple group regulated design that can't cope well with Haswell's C6/C7 states. I'd disable C6/C7 in BIOS.

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Re: Troble running retro PC with modern PSU (was "getting -5v on modern PSU")

Posted on 2017-03-18, 08:52

by

by TELVM

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

20A on +5V, 130W combined +5V & +3.3V PSU for $38: https://www.newegg.com/Product/Product.aspx?Item=N82E16817151077 Am I the only one who finds it comical that there's a power supply manufacturer named "Sparkle"? I should start a hard drive company and name it "Crash"... How about "Keep Out!": …

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Re: AMD drops the mic

Posted on 2017-03-18, 07:44

by

by TELVM

in Milliways

in Milliways

How to slipstream drivers into an ISO using RT 7 lite to smoothly install Windows 7 on AM4 ^ Google translation from italian with self-explanatory images. English link for AM4 chipset drivers: http://support.amd.com/en-us/download/chipset?os=Windows%2010%20-%2064 ... the 7700k is considerably …

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