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How DRAM changed the world

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Re: How DRAM changed the world

#121
post #41
post #23

Earlier quoted context omitted.

It's happening, Windows gets slower every year to adapt to SSDs.

tinfoil hat on. I think Microsoft is making windows slow to prepare people for when they move everything on your computer to their cloud. tinfoil hat off.

That's Wirth's law moved to a conspiracy theory level.

Re: How DRAM changed the world

#122
post #109

Earlier quoted context omitted.

Yep, we pretty much hit a wall during DDR2 rein https://en.wikipedia.org/wiki/CAS_latency#Memory_timing_exam...

No, 7.5 to 9.75ns during the DDR4 rein (DDR4-4266), according to that page.

DDR2-1066 CL4 is also 7.5ns to first data.

Re: How DRAM changed the world

#125
post #122

Earlier quoted context omitted.

DDR2-1066 CL4 is also 7.5ns to first data.

But DDR2-1066 is worse in second and later accesses.

Consequent accesses are measuring bus speed, not actual DRAM cell latency. At that point data is already loaded into a row of sense amplifiers.

Re: How DRAM changed the world

#127
post #111
post #26

Earlier quoted context omitted.

8GB -> 32GB doesn't really give you a whole lot more than opening more browser tabs or whatnot. Cache some more filesystem into memory I suppose. 8MB -> 32MB enabled entirely new categories of (consumer-level) software. It would be a game changer for performance as you were no longer swapping to (exceedingly slow) disk. They simply are not comparable, imo. 8MB to 32MB was night and day difference and you would drool…

Depends on your definition of "there". Going from 8MB to 32MB did very little for you pre Windows95. Every piece of x86 software up to that point was maxing below 8MB because ram was insanely expensive and you needed to populate 4 modules at a time. Motherboards came standard with 4 or 8 ram slots limiting your ram choices to 1,2,4,5,8,16,17,20,32 MB with last 4 costing more than motherboard and CPU combined. In 1992…

Thank you for this. It all sounds correct to me and brought back so many things I’d forgotten – but now I’m really curious how you remember these dates and numbers. My memory for details like these is pretty strong, but this level of recall is remarkable. I’m genuinely impressed.

Re: How DRAM changed the world

#128
post #111

Earlier quoted context omitted.

Depends on your definition of "there". Going from 8MB to 32MB did very little for you pre Windows95. Every piece of x86 software up to that point was maxing below 8MB because ram was insanely expensive and you needed to populate 4 modules at a time. Motherboards came standard with 4 or 8 ram slots limiting your ram choices to 1,2,4,5,8,16,17,20,32 MB with last 4 costing more than motherboard and CPU combined. In 1992…

Thank you for this. It all sounds correct to me and brought back so many things I’d forgotten – but now I’m really curious how you remember these dates and numbers. My memory for details like these is pretty strong, but this level of recall is remarkable. I’m genuinely impressed.

Its cut&paste of research I did for Vogons (retro computing forum) post some time ago in my "I need to know everything about SIMM ram" phase :-)

Personally I started with PCs around 1995 and this I remember vividly due to major mistake* I made :) I had a school friend working weekends at the local computer fleamarket scrounge for me the cheapest second hand components possible to build barebones 386 system (minimum to play Doom*/Privateer) piece by piece in $50 increments. Tiny motherboard with soldered Am386DX40 + case was first. Next months $50 paid for 4MB, ISA VGA, keyboard and FDD. This got me off the ground once I hobbled together VGA to SCART cable with special driver to use TV instead of expensive VGA monitor. Third installment another 4MB and 40MB HDD, and the final $50 concluded build with sound card, CDROM and a mouse :)

* I will never forget my friend trying to convince me to throw extra $10 for a 486SX25 on a VLB board and me casually saying 'bah bro thats a tasty pizza money thanks but no thanks' :| This fatal f-up meant 5-9fps in Doom instead of what one would call fluid at the time 10-15 fps on 486SX25+VLB, motivated me to get into PC building and started my career in IT. 3 years later I was working in a service center for regional PC components distributor.

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