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Re: Where to get AMD CPU microcode updates for BIOS MOD?

Posted on 2016-01-14, 19:19

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, the whole socket 754/939 was pretty annoying. Especially since the were both in use at the same time. It created quite a bit of confusion for some users. Back the I was working for a big hardware reseller and you wouldn't believe how many people bought a socket 939 board with a socket 754 cpu …

Re: Comparing the performance of CPU Super-286 and AMD-386DX

Posted on 2016-01-16, 07:28

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

They probably would get the same results since games likely didn't take advantage of an FPU, but have you compared them without the FPUs installed?

Re: Comparing the performance of CPU Super-286 and AMD-386DX

Posted on 2016-01-16, 07:33

by Ekb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FPU presence does not affect the game benchmark 🙁 These games are designed without FPU

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 12:59

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How come they get same (or very similar rather) results in 3DBench and Wolf3D given that one is at 40Mhz and the other at 25Mhz? Also one has a 32bit bus the other has a 16bit bus? I am a bit confused. Regards, Vlad.

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 13:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

He clocked the 386DX at 25MHz

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 13:07

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also one has a 32bit bus the other has a 16bit bus? I am a bit confused. As far as the video card goes, both have a 16-bit bus, since it's ISA. We didn't get 32-bit until 486 localbus. So for games/graphics-oriented stuff, both systems have about the same bottleneck. As for the 386 CPU being 32-bit …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 13:22

by PhilsComputerLab

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ekb, this is brilliant work! Very easy to compare, well explained and a range of benchmarks :) I didn't even know that Wolf 3D has a benchmark built in, how cool is that! Nice to see that the 286 is so quick, 25 MHz is a great speed for a lot of these older games. Wing Commander should run perfect …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 13:24

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As for the 386 CPU being 32-bit, much like with the FPU, this only matters when the software actually takes advantage of it. Problem there is that games with 32-bit support generally don't have a 16-bit version to compare against. So all the tested software here is 16-bit, which doesn't show the …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 13:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wouldn't the wider bus still give the DX an edge with memory access, as that is not limited to the ISA bus? No, because memory accesses are done via instructions that are either 8-bit, 16-bit or 32-bit. As long as you don't specifically use 32-bit memory load/store instructions, it doesn't get …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 14:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It shouldn't be that close. I think something is wrong with your 386. 386DX has a 32-bit memory bus. A 286 is 16-bit. A 386SX should give comparable performance, a DX should destroy it.

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 14:25

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No, because memory accesses are done via instructions that are either 8-bit, 16-bit or 32-bit. As long as you don't specifically use 32-bit memory load/store instructions, it doesn't get faster. Shouldn't the cache "buffer" reads and writes so even 8-bit and 16-bit sequential reads and writes would …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-16, 14:35

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Shouldn't the cache "buffer" reads and writes so even 8-bit and 16-bit sequential reads and writes would get a boost due to overall higher throughput capabilities? Yes, but that is what you're seeing, I think. Cache back then wasn't all that spectacular though. At 25 MHz, the memory is not that …

Re: Where to get AMD CPU microcode updates for BIOS MOD?

Posted on 2016-01-16, 18:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, the whole socket 754/939 was pretty annoying. Especially since the were both in use at the same time. It created quite a bit of confusion for some users. Back the I was working for a big hardware reseller and you wouldn't believe how many people bought a socket 939 board with a socket 754 cpu …

Re: Where to get AMD CPU microcode updates for BIOS MOD?

Posted on 2016-01-16, 19:40

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, the whole socket 754/939 was pretty annoying. Especially since the were both in use at the same time. It created quite a bit of confusion for some users. Back the I was working for a big hardware reseller and you wouldn't believe how many people bought a socket 939 board with a socket 754 cpu …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-17, 10:22

by Ekb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you all ! 😀 I put links BENCH286.RAR in the first post. and put more pictures benchmarks. Please test your 386SX ? To Scali: You are absolutely right in your posts. I agree with you.

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-17, 11:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It shouldn't be that close. I think something is wrong with your 386. 386DX has a 32-bit memory bus. A 286 is 16-bit. A 386SX should give comparable performance, a DX should destroy it. No it shouldn't destroy it. In 16bit code the 386 is internally faster than a 286 but not much. One can go …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-17, 13:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

By the way, I think the big difference with the FPU shows the power of the 32-bit bus. The FPU only supports datatypes of 32-bit, 64-bit and 80-bit. So even in 16-bit code, the FPU will perform 32-bit loads and stores, and on the 387 this goes twice as fast. There are two types of 287 for the 286, …

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-17, 21:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Any chance you could use an ET4000 for benchmarking 3Dbench again? I reckon you "might" score a little faster.

Re: Comparing the performance of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-18, 00:05

by Ekb

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Unfortunately, I have no ET4000. But there is available: Trident8900 (1mb), Trident9000 (512kb), Realtek (512kb), NCR (2mb) they were slower because of the high WaitState VGA<->ISA. Only CL5420 - low WS ==== Realtek RTG-3105E, 512kb http://s020.radikal.ru/i723/1601/f4/efa71bf04efdt.jpg http://s010. …

Re: Performance comparison of CPU: SuperFast-286 and AMD-386DX

Posted on 2016-01-19, 08:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Would be interesting also to see the comparision of 286 on same clock with 386SX. We had a discussion previously about is 286 faster than 386SX.

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