“C90S Unleashed” by Angel Marinov

[9800xpv]

Hi,

@ Angel Marinov

The speed of DRAM depends on two factors:

1) The speed of data transfer between MCH and DRAM ( e.g. 800 MHz )
2) The response time (Latency Timings) of DRAM or just Timing ( e.g. 5-5-5-15 )

My choice of memory was made considering above two things.

Let see our C90S case regarding to use of 667 MHz or 800 MHz RAM.

* The performance will be the same if we have the same RAM timings. “Why?”.
* Both types memory work at 532 MHz in C90S. “Why?”


N) “I think that C90S chipset can't get over 667 MHz, right?”
A) You are absolutely right!

a) A year ago, I bought some high performance RAM from Kingston : "667MHz DDR2 Low-Latency CL4 (4-4-4-12)" .
But it has been impossible to get them working at CAS 4, with ram frequency synchronized to fsb.
I even tried to modify the SPD program with no result.
Then I found that the C90S cannot use CAS 4, but unfortunately I forgot the link.

But it is possible to tweak the other timings, but CAS.
Just go and see MemSet.
So from 5-5-5-15 you can get 5-4-3-12 very easily.
It's better, is it ?

I've no test nor review to show, but everyone can play them by themselves easily.

b) @ Angel Marinov and Bigbrain

Will the E6500 (45nm) work with the 1002a bios?

E6500 and E7500 looks like to be almost the same ones.
So I think a E6500 should work with bios 1002A.

@+

[DieselMonkey]

Hey Angel,

First off, great thread! cheers for putting this info together and online.

This Saturday just gone my c90s wouldn't boot, from reading other posts it sounds like the graphics card fault has just kicked in after over 2 years of solid use. So now I'm trying to follow your thread and have a couple of questions.

1. None of the images or links to documents seem to be working, do you know if there are any hosting problems with these and when they will be back online?

2. Correct me if I'm wrong, the North bridge is directly under the GPU and the south bridge is under the big aluminium heat sink on the other side of the ram from the GPU right?

3. Is there any gas/fluid inside those copper heat pipes? looks like a neat place for a phase change system.

FYI, I'm trying to find a source MXM II ATI cards approx HD 4650/4670 DDR3, I'll post up where to source if I do find them but if anyone else knows where to get them let me know.

Cheers,
DieselMonkey

[9800xpv]

FYI, I'm trying to find a source MXM II ATI cards approx HD 4650/4670 DDR3, I'll post up where to source if I do find them but if anyone else knows where to get them let me know.

Cheers,
DieselMonkey

Hi,

Just have a look here ? Or here ? I've searched for "ATI HD 4650/4670".
But it costs a bit much money, is it ?

edit : Now I wonder if they are reallly DDR3, even if the seller claims they are.

@+

[DieselMonkey]

Thanks guys,

I've found another supplier, pretty much the same price as the one 9800xpv posted. Its also a Toshiba bios. I've asked the supplier if they know it will work in a C90s but do either of you know if a Toshiba bios ATI card will play nice with my C90s?

Cheers,
DieselMonkey

[CaptainNemo]

Hi Angel Marinov !

Its greatest modification can i see ! I can't find 1002A bios (link on this manual). Maybe Sineva.net server not working on this time. Can you send please to me this bios on email (u-boat@mail.ru) ?

Maximal CPU E7500 is 2.93Mhz or may be more ? What is maximum CPU in Mhz can be work on C90S ?

Big thanks for your work Angel !


This link not working.
http://www.sineva.net/downloads/Asus...A-1002.iso.rar

[9800xpv]

Hi,

Overclocking the C90S with TurboGear is limited to about 2.93GHz, so you can't use TG with the E7500 which is already at 2.93 to go to an higher frequency.
If you want to go to 3.0 or 3.2GHz you may use ClockGen, or SetFsb, or others. ClockGen is very easy to use with the C90S.

...
Note, the bios does not recognize .5 multipliers, only integer numbers work, ...

So the E7500 has the highest integer multiplier, the E7600 has 11.5 and it will work like a E7500 with 11.

@+

[Thaipo]

Amazing work Angel. I've been holding off doing major modifications to my c90s specifically for this guide. Mostly due to the need for creating a custom heatsink for the GPU.

That ever-wonderful 8600m GT of mine breaks all too commonly, and requires the oven fix when it cools down too quickly.

If you have any experience in .torrent files, feel free to create one with the guide & resources, and I'll happily help seed. This will hopefully help out the traffic I'm sure your site will be inundated with.


Keep up the fantastic work, most likely I'll be trying to find a CNC place around my home town to create the custom heatsink. You mentioned the need for heat pads, do you think it would be possible to modify the copper to not need the heat pads and instead use thermal paste?

[smaerd58]

Great Job on the Tutorial.....What wifi N card are you guys using on your
c90s? I tried a 4965 and only got 65mbps. I was going to try the 5100? Thanks,Rick

[smaerd58]

Thanks for the prompt reply... I found this on ebay it has the same atheros chipset. Sparklan WPEA-110N Atheros AR9280 Are you familiar with it?

[Thaipo]

Well, looks like I had the model & diy documents lying around after all. I've created a torrent for anyone that wants to grab them while waiting for Sineva.Net to come back up.

Angel; Feel free to link to the file on the original post, as I'll keep it seeding for the next week or so. As more people jump in to seed, it'll be easier to download. Also feel free to send any other files you feel should be included and I can create another torrent for those files as well.

Here it is:
http://www.legittorrents.info/index....aff00a611be5d2