Cs MKII

[Kawazu]

Thanks to Chucky my MKII is now doing 100mhz
And you can feel the difference from the 72mhz I used to have compared to the 100mhz when you for example use iBrowse

[Matt_H]

Wow, I didn't even know it was possible to clock them that high. Any side effects? I thought the onboard SCSI failed above 66MHz or so.

[HammerD]

Thanks to Chucky my MKII is now doing 100mhz
And you can feel the difference from the 72mhz I used to have compared to the 100mhz when you for example use iBrowse

Nice, what did Chucky do to get it to 100Mhz? I Have my MK2 running at 60Mhz.

[QuikSanz]

Thanks to Chucky my MKII is now doing 100mhz
And you can feel the difference from the 72mhz I used to have compared to the 100mhz when you for example use iBrowse

Sure would like that on my MKIII!

[gregthecanuck]

Wow look at those MIPS!!

[orange]

what about overheating?

[klx300r]

Sure would like that on my MKIII!

not me I like my CS-MKIII nice and stable and still darn fast with my UWSCSCI working just fine with no issues thank you;)

[BLTCON0]

not me I like my CS-MKIII nice and stable and still darn fast with my UWSCSCI working just fine with no issues thank you;)

+1

[Kawazu]

I will link a post from amibay where everything is explained so I don't have to type a novel on my por phone

http://www.amibay.com/showthread.php?90901-Amiga-hardware-repair-restoration-and-upgrade-service&p=850485&viewfull=1#post850485

[Kawazu]

what about overheating?

At the moment I have not had any problem with the heat, I have tried to measure thre temperature of the heatsink itself with an IR measuring device and the highest I could record was 38c.

Chucky did some recording with a way more advanced instrument on the CPU itself without a heatsink and he hit over 90c in an instant.

So with a heatsink and a bit larger fan you will be just fine

[Whaka]

Wow, I didn't even know it was possible to clock them that high. Any side effects? I thought the onboard SCSI failed above 66MHz or so.

no side effect at all. the mod consist to put the MkII in 040 mode only by moving 2 switch.
by doing this, you divide the bus frequency by 2. so, when you run a 060 at 100 Mhz, the bus run at 50.
so, the scsi work, and no stress at all for the logic and ram.

the only side effect is your 060 wasting a lot of cycles to wait for ram access
a real exemple : doom will run more fast at 72-75 Mhz with a 1/1 bus than 100 Mhz with a 1/2 bus...

mips are cool, but... that's not all.

Sure would like that on my MKIII!

you can, the same way. but you need to switch the cpu voltage to 5V and get a 040>060 adapter.
but you'll face the same drawback. you get more mips on benchmark, but you bottleneck ram access...

in short : i'll never trade my Mk3 running 75Mhz for a Mk2 running 100 Mhz
i have both, so i experienced.

[Kawazu]

no side effect at all. the mod consist to put the MkII in 040 mode only by moving 2 switch.
by doing this, you divide the bus frequency by 2. so, when you run a 060 at 100 Mhz, the bus run at 50.
so, the scsi work, and no stress at all for the logic and ram.

the only side effect is your 060 wasting a lot of cycles to wait for ram access
a real exemple : doom will run more fast at 72-75 Mhz with a 1/1 bus than 100 Mhz with a 1/2 bus...

mips are cool, but... that's not all.


you can, the same way. but you need to switch the cpu voltage to 5V and get a 040>060 adapter.
but you'll face the same drawback. you get more mips on benchmark, but you bottleneck ram access...

in short : i'll never trade my Mk3 running 75Mhz for a Mk2 running 100 Mhz
i have both, so i experienced.

Can you let the rest of us see some benchmark screenshots?

[Whaka]

for the moment, i can only post some screenshots with sysspeed and bustest with my Mk3 at 75 (74,3 Mhz wichamiga say) , set to 60ns for ram in firmware.

[ATTACH]5778[/ATTACH]
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i don't have screenshots with Mk2. and as it run at 100 Mhz too, it won't be useful...

but finding somone else with a OC'ed Mk2 running 1/1 bus to compare is doable i think... HammerD can you help ?

[Kawazu]

for the moment, i can only post some screenshots with sysspeed and bustest with my Mk3 at 75 (74,3 Mhz wichamiga say) , set to 60ns for ram in firmware.

[ATTACH]5778[/ATTACH]
[ATTACH]5779[/ATTACH]

i don't have screenshots with Mk2. and as it run at 100 Mhz too, it won't be useful...

but finding somone else with a OC'ed Mk2 running 1/1 bus to compare is doable i think... HammerD can you help ?

Is there any form of real life application we can benchmark and see for example fps difference in a game or somthing?

[Oldsmobile_Mike]

Is there any form of real life application we can benchmark and see for example fps difference in a game or somthing?

The only way to get an accurate result for that would be on two otherwise identical systems (even better, the same system, just swap the boards) - since even things like what version you a math library a person is running might be enough to throw off the results.