I have a chance to pick up a 486DX-50 system which runs its VESA bus
at 50 MHz. The implication is that graphics will go much faster than
on typical systems which have 25Mhz or 33Mhz busses. Does anyone
have such a system and has tried it with NASCAR SVGA? I know I'm not
especially impressed with my P90 when it's running in SVGA, but I also
know its internal bus is running at 33MHz.
Note: This is not a DX2-50, a DX - this would either be an
old system released before DX2's came out or a new one specially
purchased for this kind of thing.
--
Brian Wong Product Marketing Engineering
Quoted text (13 lines)
>I have a chance to pick up a 486DX-50 system which runs its VESA bus >at 50 MHz. The implication is that graphics will go much faster than >on typical systems which have 25Mhz or 33Mhz busses. Does anyone >have such a system and has tried it with NASCAR SVGA? I know I'm not >especially impressed with my P90 when it's running in SVGA, but I also >know its internal bus is running at 33MHz. >Note: This is not a DX2-50, a DX - this would either be an >old system released before DX2's came out or a new one specially >purchased for this kind of thing. >-- >Brian Wong Product Marketing Engineering...
>Correct me if I'm wrong (and I very well may be...) the fastest DX
>clock speeds for 486's without clock doubling was 40 mhz, correct?
>Someone could be doing the typo thing.
There are a lot of DX50's out there. My father has one. They became
too expensive to make since the DX2-66 was just as fast. And the
DX2-66 has got a motherboard speed of 33MHz while the DX50 has got
to run at 50 MHz. This means a putting higher pressure on the parts
and graphics card of the computer making it expensive... Some
cards (local bus) just don't work at 50 MHz.
/Michael
Quoted text (13 lines)
>>I have a chance to pick up a 486DX-50 system which runs its VESA bus >>at 50 MHz. The implication is that graphics will go much faster than >>on typical systems which have 25Mhz or 33Mhz busses. Does anyone >>have such a system and has tried it with NASCAR SVGA? I know I'm not >>especially impressed with my P90 when it's running in SVGA, but I also >>know its internal bus is running at 33MHz. >>Note: This is not a DX2-50, a DX - this would either be an >>old system released before DX2's came out or a new one specially >>purchased for this kind of thing. >Correct me if I'm wrong (and I very well may be...) the fastest DX >clock speeds for 486's without clock doubling was 40 mhz, correct?Brian:
Proof positive of the *** between Intel and Papyrus to make us all go broke... :)
BTW, what's with the "furious" address?
-----------------//------------------------------------------------
| )/-\(_)|__ // "Hi, we're the new Generation X spokesweasels."
| nightshade // -- Keith Olbermann on ESPN Sportscenter --------------//---------------------------------------------------
> I have a chance to pick up a 486DX-50 system which runs its VESA bus
> at 50 MHz. The implication is that graphics will go much faster than
> on typical systems which have 25Mhz or 33Mhz busses. Does anyone
> have such a system and has tried it with NASCAR SVGA? I know I'm not
> especially impressed with my P90 when it's running in SVGA, but I also
> know its internal bus is running at 33MHz.
According to PC Magazine if you have an Intel Pentium 90 then your
memory-bus speed is 60 Mhz and your expansion bus speed is 30 Mhz.
--
_____
/ O \ POWERPHIL
[o=====o] Get there Phast!
Quoted text (13 lines)
> I have a chance to pick up a 486DX-50 system which runs its VESA bus > at 50 MHz. The implication is that graphics will go much faster than > on typical systems which have 25Mhz or 33Mhz busses. Does anyone > have such a system and has tried it with NASCAR SVGA? I know I'm not > especially impressed with my P90 when it's running in SVGA, but I also > know its internal bus is running at 33MHz. > Note: This is not a DX2-50, a DX - this would either be an > old system released before DX2's came out or a new one specially > purchased for this kind of thing. > -- > Brian Wong Product Marketing EngineeringYour wrong. :)
No, they do have 486DX50's... Non clock doubled...
That's what wait-states are for.
Quoted text (10 lines)
>>>I have a chance to pick up a 486DX-50 system which runs its VESA bus >>>at 50 MHz. The implication is that graphics will go much faster than >>>on typical systems which have 25Mhz or 33Mhz busses. Does anyone >>>have such a system and has tried it with NASCAR SVGA? I know I'm not >>>especially impressed with my P90 when it's running in SVGA, but I also >>>know its internal bus is running at 33MHz. >>>Note: This is not a DX2-50, a DX - this would either be an >>>old system released before DX2's came out or a new one specially >>>purchased for this kind of thing.: >>>I have a chance to pick up a 486DX-50 system which runs its VESA bus
: >>>at 50 MHz. The implication is that graphics will go much faster than
: >>>on typical systems which have 25Mhz or 33Mhz busses. Does anyone
: >>>have such a system and has tried it with NASCAR SVGA? I know I'm not
: >>>especially impressed with my P90 when it's running in SVGA, but I also
: >>>know its internal bus is running at 33MHz.
: >>>
: >>>Note: This is not a DX2-50, a DX - this would either be an
: >>>old system released before DX2's came out or a new one specially
: >>>purchased for this kind of thing.
: I wish you the best of luck, but I can state with little fear of being
: wrong that:
: 1) Your external cache will probably not work at all
Cache works fine on my DX50.
: 2) If you don't have 60ns DRAM, you'll need a ton of wait states
70ns chips are quite happy.
: 3) Make sure your CPU has an alarm on the cooling fan
Mine has been running fine for three years now.
: 4) Good luck finding a video card too...
My ATI is quite happy.
Having said all this though, I don't think you'll have the power to run
NASCAR properly. Remember, clock speed isn't the only factor. Pentiums
can do more in each clock cycle than a 486 can. Killer graphics aren't
just a lot of bus transfers - they also eat processor time, it's still
the CPU that determines what to display and where to display it. A
DX50 will outperform a DX2-50, but don't buy it expecting today's
NASCAR and tomorrow's sims to run properly.
Brian
--


































