ECS K7S5A with AMD 2200 T-bred

[deerhunter]

Remember the old K7S5A, whooop here it is!
I'm RMAing my Abit, they want to mod it for T-bred usage.
I was bored so I dusted off my old ECS mobo.
Not bad performance for a non-overclocking, inexpensive mobo.

I popped the T-bred in my ECS,
I had to mod the Vcore on pins 1 & 7 of the mobo to get 1.8V.
I used Almico Speedfan to get FSB 147.

ECS runs Thoroughbreds very nice!!!

http://home.attbi.com/~kev63/ecs.jpg

[Bravo]

mmm....almost ghetto....:D

[Smizack]

Hmmm... This should make Gooch very happy.;)

[candjac]

Deerhunter etal,
If you're interested...here's how to enable the ECS K7S5A for Multiplier control. Solder 7 fine wires to the backside of the mobo where the Socket a plugs in. Easy to solder as pads of solder exist there already and just need to touch tinned wire ends to those pads...heat and done.

The pin locations would be the pinouts for the 5 L1 bridges plus a Vcore pin = Vcc plus a ground pin = Vss.
http://www.beachlink.com/candjac/index.htm link to Palomino final decoding article for pic which shows the pinouts for the L1s plus they are ID'd like AJ27 etc.

Then you run the wires to a small Radio Shack pcb where you create 5 switched or jumpered circuits, switching each of the 5 between HI = Vcc and LO= Vss. But also do not switch directly to Vcc or Vss, put one 100 ohm resistor between the switches/jumpers and connections to each of the 5 Vcc and 5 Vss. Then each HI/LO switch/jumper "pair" gets set to one closed/one open and it will reset each of the 5 Bit Values or leave them as default...depending if you reset opposite to default HI/LO or set to the same HI/LO..your signal will over-ride default if opposite.
Mount the assembly on the case somewhere and reset Multipliers without opening the case.

We "did" this with a K6 system, have (1) 10 unit dip switch on the front panel to control Multiplier, FSB freq, Memory freq, FSB/PCI divisor (503+ mobo).

Let us know if interested...can work up a circuit diagram on "Paint".
John C.

[deerhunter]

Cranked up the Vcore some more and flashed to the
cheepobios from ocworkbench.com
2 Giggers on an ECS K7S5A, whodda thunk it?
http://home.attbi.com/~kev63/ecs2g.jpg

[scrllock]

:D I think we need a ghetto overclocking forum... Overclocking awesome systems with at least one critical part that wouldn't normally be used, i.e. the k7s5a. Anyone want to make a K7S5A mod guide?

[nossid]

Originally posted by scrllock
:D I think we need a ghetto overclocking forum... Overclocking awesome systems with at least one critical part that wouldn't normally be used, i.e. the k7s5a. Anyone want to make a K7S5A mod guide?

Old thread but I´ll post anyway. There is a pretty much complete guide for K7S5A here: http://www.ocworkbench.com/2002/ecs/k7s5aguide/

Just scored over 10k in 3dmark for the first time with this mobo, and this with a lousy 235W PSU. I'm going for atleast 12k when my new 550W PSU arrives. All on simple SDRAM btw.
http://service.futuremark.com/compare?2k1=5311962

[Kunaak]

I used the modded Bios I found on overclockers.com somewhere in the forums there, on that same board.
all I got as 142, but then again the board was unmodded, except the unofficial Bios. it was actually kinda fun to do.

[sjohnson]

I used to have a K7S5A (sold it), 166 FSB and a 950 Spitfire running @1250. I preferred the Honey X O/C BIOS, the CheepoBios was giving me fits with instability on either of PC133 or PC2700.

A nice bootable CD image with BOTH BIOS' and other simple tools can be had at http://buckeyefan.digitalrice.com/k7s5a_bios/index.html .

Actually just bought a new K7S5A to build a simple system for my son. Might be fun to see what it can do. Got the old one stable at 166 and could get 1-2 seconds @200 FSB, never enough for even a SS...