English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 02 July 2010, 16:18   #1
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
A1200 030/40mhz faster than A2000 030 50mhz?

Just curious. I ahve a 40mhz accelerator in my A1200 and under all benchbarks (Sysinfo and AIBB) it is faster than aGVP 030 50mhz that is on my A2000?
In sysinfo it shows as 8.x MIPS vs the GVP at 7.8 MIPS as in comparison to the A600 (all I acn rememebr now) shows 14.x for the 40mhz and 13.8 for the 50mhz

Any thoughts

thanks
desantii is offline  
Old 02 July 2010, 16:21   #2
alexh
Thalion Webshrine
alexh's Avatar
 
Join Date: Jan 2004
Location: Oxford
Posts: 12,393
The A2000 has 16-bit Chip RAM and the A1200 has 32-bit but CPU benchmarks shouldn't use Chip RAM.

Have you checked that both have caches switched on?

Could the RAM controller on the A1200 accelerator be zero-wait-state and the one on the A2000 have wait-states?
alexh is offline  
Old 02 July 2010, 16:34   #3
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
Both have caches on, the A2000 one uses GVP ram the other uses standard ram
desantii is offline  
Old 02 July 2010, 17:40   #4
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
Here is a picture of the systenfo of each, the, faster one is the 40mhz


desantii is offline  
Old 02 July 2010, 18:50   #5
Jope
-
Jope's Avatar
 
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 39
Posts: 7,909
One is running in PAL and the other is in NTSC. Sysinfo's timing loops are tied to the screen's refresh rate to an extent, so they are not comparable unless you use the same screen mode.
Jope is offline  
Old 02 July 2010, 18:53   #6
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
OK, will run both in NTSC later today
desantii is offline  
Old 02 July 2010, 18:59   #7
alexh
Thalion Webshrine
alexh's Avatar
 
Join Date: Jan 2004
Location: Oxford
Posts: 12,393
How come dburst is switched off on both?
alexh is offline  
Old 02 July 2010, 19:09   #8
rkauer
I hate potatos and shirts
rkauer's Avatar
 
Join Date: Oct 2007
Location: Sao Leopoldo / Brazil
Age: 54
Posts: 3,482
Send a message via MSN to rkauer Send a message via Yahoo to rkauer
The speed heavily depends on the RAM architecture and how it interfaces with the CPU and with the Amiga chipset.

Apollo accelerators seems faster than Blizzard ones on the A1200 for that exact reason. But Apollo units are less stable than Blizzards.
rkauer is offline  
Old 02 July 2010, 20:48   #9
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
I reran the 50mhz with PAL, no chnage. I also tried witll alla cahes (I guess what is in the pictures is the default)

desantii is offline  
Old 02 July 2010, 22:15   #10
alexh
Thalion Webshrine
alexh's Avatar
 
Join Date: Jan 2004
Location: Oxford
Posts: 12,393
Erm, you were supposed to re-run the 50MHz one in NTSC weren't you? You already ran it in PAL first time round.

DBURST on should make a big difference if the benchmark and the RAM controller support it.
alexh is offline  
Old 02 July 2010, 22:21   #11
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
Actaully no, the 40mhz one was in PAL and the 50mhz in NTSC so I reran the 50mhz in PAL. Now both are in PAL

I will try the burst tonight
desantii is offline  
Old 03 July 2010, 00:06   #12
alexh
Thalion Webshrine
alexh's Avatar
 
Join Date: Jan 2004
Location: Oxford
Posts: 12,393
It has to be the memory controller then. Perhaps there are some jumpers on the board?

What position is jumper J12 in? Open or closed?
alexh is offline  
Old 03 July 2010, 04:02   #13
desantii
Registered User
 
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
JP12 was open, if I close I get a minor boost but then 8mb of fast ram gets mapped as ZorroII ram

What is the normal speed of an 030 50mhz? Maybe the 40mhz one is too fast? BTW, DBURST On has no effect on speed

desantii is offline  
Old 03 July 2010, 05:38   #14
Zetr0
Ya' like it Retr0?
Zetr0's Avatar
 
Join Date: Jul 2005
Location: United Kingdom
Age: 45
Posts: 9,768
@desantii

rough 030 speeds on an A1200 (SYSINFO) (non-GVP / based on 72Pin Memory Controllers)

28Mhz = 5.8 MIPS (M-Tec 1230 Viper)
33MHz = 6.4 MIPS (Apollo 030Mk3)
40Mhz = 7.9 MIPS (Apollo 030Mk3)
50Mhz = 9.1 MIPS (Blizzard Mk4)


Now, (rough from memory) 8MB Fast Upgrades (Again SYSINFO)

2.5 MIPS = Hawk 8MB Board(s) (lots of rebadged cards use this reference board)
2.8 MIPS = E1208 (Elbox)*
2.4 MIPS = DKB1202
2.3 MIPS= PC1204

*very fussy with the memory - impressive though the E1208 was I found it at times a little unstable with known good ram, although its really one of those cards that - once you found the memory that makes it happy, leave it with it!!!!


MIPS only tell half the story with Amiga accelerators, perhaps the next biggest thing for the Amiga is FAST to CHIP writes and CHIP to FAST writes

Last edited by Zetr0; 03 July 2010 at 05:52.
Zetr0 is offline  
Old 03 July 2010, 06:07   #15
rkauer
I hate potatos and shirts
rkauer's Avatar
 
Join Date: Oct 2007
Location: Sao Leopoldo / Brazil
Age: 54
Posts: 3,482
Send a message via MSN to rkauer Send a message via Yahoo to rkauer
MIPS: Meaningless Indicator of Processor Speed
rkauer is offline  
Old 03 July 2010, 10:15   #16
8bitbubsy
Registered User

8bitbubsy's Avatar
 
Join Date: Sep 2009
Location: Norway
Posts: 1,413


But on a related note, is a 040 40MHz much faster than 040 25MHz?
My Apollo 1240 (XC68040RC40) is underclocked from 40MHz to 25MHz because I have no heatsink, but will I be very happy if I go back to 40MHz and get a heatsink for it? There's literally no room for one, so I need to do some hackery to get a heatsink fitted. Having a heatpad + copper pipe leading to a big heatsink where the floppy drive used to be, has always been a dream I have at nights.
8bitbubsy is offline  
Old 03 July 2010, 11:06   #17
Photon
Moderator

Photon's Avatar
 
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 4,819
A wet dream?
Photon is offline  
Old 03 July 2010, 11:58   #18
8bitbubsy
Registered User

8bitbubsy's Avatar
 
Join Date: Sep 2009
Location: Norway
Posts: 1,413
Quote:
Originally Posted by Photon View Post
A wet dream?
Yes! Imagine 040 40MHz 100% stable, it's a dream to me. (I have 2x 060 CPUs but none of them works in my Apollo 1240, not even the other MC68040RC33 I have work).... Only this old XC68040RC40 oven works, but it freeze all the time because of no heatsink.
#%"%#%!
8bitbubsy is offline  
Old 03 July 2010, 12:03   #19
alexh
Thalion Webshrine
alexh's Avatar
 
Join Date: Jan 2004
Location: Oxford
Posts: 12,393
Quote:
Originally Posted by Zetr0 View Post
the next biggest thing for the Amiga is FAST to CHIP writes and CHIP to FAST writes
Please explain. We talking about a DMA to / from Chip RAM to Zorro II Fast RAM? Lots (the majority?) of accelerators don't have such capability. Or are we talking about copies between FAST & CHIP RAM using the CPU?
alexh is offline  
Old 03 July 2010, 13:05   #20
Zetr0
Ya' like it Retr0?
Zetr0's Avatar
 
Join Date: Jul 2005
Location: United Kingdom
Age: 45
Posts: 9,768
@alexh

FAST & CHIP read/write using the CPU....
Zetr0 is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Upgrading GVP A530 from EC030 @ 40MHz to Full 030 @ 50MHz Mogsy Hardware mods 37 08 January 2013 09:16
For Sale: A1200 40mhz 030 accelerator with 32mb PowerPie5000 MarketPlace 15 20 May 2010 15:58
GVP-M Typhoon A1200 030 40MHz Accelerator kipper2k support.Hardware 18 08 May 2010 12:27
Rain TBL - A1200 + 030 50Mhz NovaCoder support.Demos 18 22 January 2009 17:26
GVP G-force 030 board for A2000-problem switching between 030 and 68k Unregistered support.Hardware 5 19 August 2004 10:04

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 12:00.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Page generated in 0.09162 seconds with 13 queries