guess I need to unlock my XP1600...

[motorsKill]

Hey all, I ordered a 1600+ processor back in November without verifying that it would work in my old Abit KT7-Raid mb...well I needed a cheap motherboard to throw it in till something comes out with all the features I want(OC bios, Raid, USB2, XP temp diode support!) ...I decided on a ECS K7S5A(SiS735)...not an overclockers board, but I didn't expect to be using that long and it was only 60 bucks. I can change the multiplier and a few memory tweaks in the bios, but no vcore adjustments :(
Up till now I haven't attempted to overclock the CPU cause I was waiting for my new motherboard to be released. Well it was bothering me the other night when I was thinking that my old system (1.2TB@1450) is running faster then my new system (XP1600+@1400)... I decided to see what I could sqeeze out of this setup as-is. I was a bit disappointed when my I couldn't get my FSB stable above 143 ...my memory is Mushkin 512MB DDR PC2100 *Special* (CAS2) I assume that my memory can run faster, but 147FSB locks windows and 150FSB doesn't post. Heat is not an issue, watercooled with a DDMaze2 and Eheim1250...temps never go above 35C@full load. My question is where to go from here...I can't close all my bridges cause my bios will only let me control the FSB. Also if I close bridges on my chip to adjust my vcore, will my motherboard actually supply that voltage even though it does't allow internal adjustments for it in the bios? Sorry for all the newbie questions...I just been spoiled by Abits SoftMenu for the last couple years ;)
Thanks,
Rich

[Jeniva]

Hey..I just had the same trouble O/C'n my 1700+, someone told me that they hit another PCI divider at 150..so I tried 150 FSB and my xp1700+ is now running at 1650Mhz!!..not to shabby..you might give that a try..good luck :D

[motorsKill]

Thanks for the reply Jeniva...Yes I had already tried 150 FSB and my machine doesn't even give me a video signal...If I boot normal and use SoftFSB to switch to anything over 143 FSB my machine locks up. I pulled the chip out today and connected all my L11 bridges to set my vcore to 1.85 ...SiSoft Sandra is reporting 1.84v but still I am unable to OC any higher :( ...I left my multiplier alone for now, but I may try to drop it from 10.5 to 9 tomorrow to see if 143 FSB is indeed the highest I can expect from this system. Still I did manage to get about 100mHz extra out of this CPU...but compared to my last 2 systems I built for myself, there is definately diminishing returns as far as overclocking goes...650 Duron@1039mHz=389mHz overclock, and 1.2TB@1450=250mHz overclock. I am gonna try some different multipliers tomorrow before I give up. I guess when a new motherboard comes out that catches my eye, I'll budget for another faster XP processor to get with it. I guess it could be my memory holding me back, but Corsair didn't have any sticks of 512MB DDR when I built this system, and I've had good luck with Mushkin non DDR in the past. Damn!...now I wish I hadn't promised the wife no more computer purchases till March :)
Thanks again,
Rich

[Rychen]

(1) where in the bios can you change the multiplyer on a K7S5A???
(2) Is your XP unlocked?? if so did the multiplyer adjustment show up after unlocking it?

I was told there was no multiplyer adjustment in the bios even after unlocking the CPU ,please correct me if I'm wrong??
also If your unlocking the CPU how do you know what bridges on the L1 would increase your multiplyer.
I want to unlock mine but! I dont know which ones to bridge to up the multiplyer!
Thanks in advance
Ry.

[motorsKill]

Hi Rychen...unfortunately it is true that you cannot adjust the multiplier in the bios on the K75SA. There is an interactive XP CPU painting guide http://www.ocinside.de/index_e.html?/html/workshop/socketa/socketa_resistors.html (here).
There is also an ECS section in the AMD motherboard forum on this board. If you have any further questions specific to the ECS mb. I attempted to change my multiplier by manipulating the L3 & L4 bridges on my chip, but I was shooting for 9 or 9.5 multiplier and ended up with 12.5 :eek: ...I suspect that I didn't cut deep enough into the chip to cut the traces, but I figured it was better to cut too shallow than too deep ;) ...I will try again when I get more time. GL

rich