help! ti500 @52c with socket A cooler!

[jeeves74]

I must own the worst ti500 in existance, no really i mean THE WORST one in existance. It has always thrown a fit if it is pushed past 255mhz on the core and 560mhz on the memory. :mad:

This is what i have done:

1. Get a 30cm desk fan to blow over it. Still cacks out at 255

2. Close the case and put 2 120mm fans blowing over 200cfm of air (a lot for this relatively small case). No difference

3. GET VERY :mad: :mad: with it

4. Remove the awful 1/2 sized blorb on it and cleaned everything up. partially lap the core

5. Buy on of these and again do some minor lapping http://www.akasa.com.tw/akasa/coolers/ak350/AK-350.jpg

6. attatch that cooler by a 1:1:1 mixture of AS3 and ASTA Part A and B. no pressure applied to the join and probably to thick a layer of AS used

7. In this configuration, the board completes one full loop of 3dm2k1 at 265 but later that day and for the rest of the week it locks up at anything higher than 257. I measured the temperature (on the back of the chip) to be 43c idle and 47c load

8. v.v.v.v unhappy with performance. stick the card in the freezer for 1h30 so i can prise the the heatsink off the card.

9. Do a very good lapping job on both the core and the heatsink (you can see ure face in both). Re-attach them using AS3 but with a 1cm squared blob of 1:1:1 of above mixture in each corner. Clamp it and put it under A LOT of pressure. Leave it overnight

10. reverse the fan to pull rather than blow. temps reach 50c idle and 55c load, no better than with stock!

11. turn the fan round to blow again. temps are slightly better at 47c idle and 52c load. core is not even stable at 252!

HELP. What have i done wrong? ambient temp here is 21c. assuming the ti500 puts out about 30w heat then that must mean (if i have done it right) that this cooler has a c/w of 1 which doesnt' sound right considering it supposed to be able to cool an AXP 2000+.HELP

[JokerHCG]

it seems that your core has reached its limit. YOu may want to try to add an even beefier Socket A HSF with a C/W of less than .4 .

[Emericana]

I must own the worst ti500 in existance

yup your right

[Bull]

It depends alot on what brand you get. I have a Visiontek and a Jaton geforce 3 ti 200. The Jaton gets only 20 mhz memory over stock and the Visiontek gets 100 over. Usually a cheaper vid card company will just use the bare minimum and are not worried about overclockers.:(

[Silversinksam]

attatch that cooler by a 1:1:1 mixture of AS3 and ASTA Part A and B. no pressure applied to the join and probably to thick a layer of AS used


Thats your problem right there, Adequate pressure must be applied when affixing the heatsink with ASA. I use Clamps when I affix an IU heatsink to a GPU

Btw I noticed the fan says AKASA, is the heatsink an Akasa as well? Its looks like an Alpha Pal 153u in copper....In any event its a nifty looking heatsink.

[-=UR=- Ranger]

[QUOTE]Originally posted by Silversinksam
[B]


Thats your problem right there, Adequate pressure must be applied when affixing the heatsink with ASA. I use Clamps when I affix an IU heatsink to a GPU

He realized this himself and changed it afterwards.
At least that's what he says two lines further down...:D

[jeeves74]

Thanks for the help guys.

in the end the problem was that i had lapped only the centre of the core, making it even more concave than it already was!! only the edges were actually touching the heatsink (muppet methinks) :rolleyes:.

i'm not sure how i should re-attatch it though. i can:

1. Drill some holes in the bottom of the heatsink and bolt it in and use pure AS3 on the core

2. use the same 1:1:1 or 1:1:2 mixture and apply a thinner layer with a clamp

which would give better performance?

that heatsink is made by akasa (ak-350). it has 225 pins and to my knowledge performs as well as most other 1U coolers.