Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

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Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

Postby Tmansdc1 » 2019-8-28 @ 11:19

I'm building a new pc and the processor I have chosen to use is the Ryzen 5 3600x. Now I've heard that the first gen ryzen's were kind of slow with dosbox and that there were some problems with the VME and I wanted to know if that is still an issue? If it is I may just go for the i5 9600k or i7 9700k instead.


Any other incompatabilities that I should be worried about? Plus performance will hopefully be better anyways then my two laptops. One has a slightly downclocked i7 4700mq (Turbo limits were all cut by 200mhz to prevent overheating) and my other laptop has an i7 8750h so yeah.
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Re: Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

Postby aqrit » 2019-8-29 @ 23:40

DOSbox doesn't use hardware-assisted virtualization.
You may have it confused with Virtual PC, dosemu, ntvdm, etc.
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Re: Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

Postby Tertz » 2019-8-30 @ 19:18

Tmansdc1 wrote:I'm building a new pc and the processor I have chosen to use is the Ryzen 5 3600x. Now I've heard that the first gen ryzen's were kind of slow with dosbox and that there were some problems with the VME and I wanted to know if that is still an issue? If it is I may just go for the i5 9600k or i7 9700k instead


DOSBox worked better on Intels. With Ryzen it's doubtful to be changed, but I have no concrete numbers. On previous Zen+ the performance was close to Intel 2xxx.
There are a very few DOS games where Ryzen CPU mb not enough for you. For those games mb better to use hardware virtualization alike Virtual PC (if it works with Ryzens) and on Intels also. The example of such games is Pyl.
Also higher performance mb useful if you want to run Win9x games in DOSBox. But it's exotic and there should be other good emulators.

If you have more money on Intel CPU, you'd better bought 8 core 3700X to have longer timelife for gaming. I doubt you'll play much in several resources-hard DOS games where appears a use to have modern Intel. But to play in future games - rather possibly.

problems with VME were reported as fixed
if you get problems with stuttering - try to reduce cycles or use fixed cycles up to 50000
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Re: Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

Postby Silanda » 2019-9-08 @ 01:19

The VME bug is back with Zen 2. Hopefully they'll fix it in an AGESA update.

Going from an overclocked i5 3570K to a 3700X, DOSBox performance seems unspectacular, yet the Ryzen absolutely annihilates the i5 when using PCem. It's not remotely close.
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Re: Do the newest 3rd gen zen 2 ryzen's still have problems with dosbox?

Postby Tertz » 2019-9-10 @ 01:31

Silanda wrote:Going from an overclocked i5 3570K to a 3700X, DOSBox performance seems unspectacular, yet the Ryzen absolutely annihilates the i5 when using PCem.


Zen2 result is interesting in benchmark theme in the signature. To see the degree of the improvement.
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