Re: i5 SFF Desktop / CUDA (VINTAGES ...)

Augusto <hb9tza@...>

HI, Allan G3PIY,
I still have a replacement part, sealed in box: a Seagate full size 10Mb hard disk!

Sorrily I do not have anymore at least one of the many Cordata 8088 "portable" (15kg - 220Vac) PC I had these times.
I ran my first Packet Radio VHF BBS with two 5,25" floppies and 8088 CPU 256K RAM ...
Later, another Cordata 8088 ran as a terminal for the home made Packet TNC .
Later substituted by a TAPR TNC (known as TNC-1); other Cordata, and later on for many TNC2 operating as Net Nodes.

Then endly, as the mess and no rules rised, I did QRT all, VHF and UHF net and BBS, and went to a Pactor II HF Terminal with a wonderful SCS-PtcII ...
It was many years ago, but a good age, until the mass come in, destroying all with bad operating techniques and giant egos ...
It was at the beginning called "Packet Revolution" but sorrily became quickly "Packet Involution".

               73 , Augusto

Il 04/07/2019 12:22, Allan Isaacs ha scritto:

Things never stand still do they Bob.. otherwise the manufacturers would go out of business.

I remember building a “state of the art” computer donkeys years ago. It had a mind-numbing 133MHz Socket 7 processor and the RAM was £1 per Meg.

The customer managed to raise enough cash for 132Meg and an enormous 500MB hard drive with a new fangled IDE interface completed the package.

Windows 95 came on a box full of 3.5 inch floppies.

I still have the hard drive from customer’s older IBM machine, a Seagate ST-406, 5MB.

Allan G3PIY

From: [] On Behalf Of BobS via Groups.Io
Sent: 04 July 2019 02:42
Subject: Re: [SDR-Radio] i5 SFF Desktop / CUDA


As another poster has commented, comparing Intel processors across the generations can be dangerous.  Being that the main thing you're looking to do is run high-powered SDR software, I'm afraid you cannot do it on the cheap.  SDR-Radio is a quite intensive program simply because it has to be.  It's processing 2Mbps or more of data, running gobs of Fourier transformations, etc.  That's why CUDA is so important as the deep computational algorithms are offloaded to the GPU.  

You mentioned an Intel Core i5-4570.  That is a processor from Q2 2013, so it's six years old.  From the 4 in the model number, you know it's a 4th generation variant.  Intel is currently shipping generation 9, although that's relatively new.  Generation 8 chips are still being sold across all manufacturers.  As a general guideline, for doing heavy math, you should not go more than one or two generations back.

A CPU from 2013 is just not suited for top-end software from 2019 like SDR-Radio.

The CUDA/GPU benefit is significant, but you can get around it by paying in CPU usage.  I have one computer with a Nvidia GPU and CUDA and a Microsoft Surface, which uses Intel graphics.  When I run SDR-Radio on the machine with CUDA, I barely know it's running.  When I run it on my Surface, I'm generally around 25%-40% CPU usage, depending on how much data (bandwidth) I'm processing.  It's not a sin to have moderate to high CPU usage, and I'm not affected in my other work.  But I do take a significant hit by not having CUDA.

If you want the best for SDR-Radio, buy a modern CPU (look at an AMD Ryzen) and absolutely get a decent video card.  I wish you the best!  I realize that isn't the answer you're seeking.  

-- Bob (N3OEA)

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