OC'ing Problem - Counting on u PPL. - Pls. HELP !!!!!

[Muggy]

This is a post that I came across in another H/W forum.


My cousin had called me yesterday to overclock his system consisting of the below stuff

AMD Athlon64 3200+ (2.0Ghz,1MB L2 Cache, ClawHammer core with SH7-C0 revision), with Stock Cooling

MSI K8N Neo Platinum, with a active HSF on chipset

1 SAMSUNG 80 GB SATA HDD (Plugged on SATA 3)
1 Samsung 40 GB IDE HDD

Iomega 16X DUAL LAyer DVD writer

3*256 MB RAM of brand Super Elixir (having NANYA Technologies RAM chips that has been checked for compatibility on MSI Test Report)

Now coming on the problem

I checked the RAM for its Overclockability (honestly I had never heard of NANYA technologies), the RAM did good it clocked 280 Mhz DDR ie 560 Mhz with tight timings of 2.5-2-2-5 on 2.75V

I set the HT multiplier to 3 and started pushing FSB with CPU multilpier set at 9 and CPU core set at 1.6V and RAM set at 2.5-2-2-5 with 1:1 ratio

As I started clsoing towards 267 Mhz HT the RAM started showing errors in memtest86 I was damn shocked. I had checked the RAM to be stable at 280 Mhz DDR with the same timings.

I reduced FSB to 255 Mhz yet the same thing.

Finally just to see if RAM was the actual culprit I decreased the CPU multiplier to 7. BUT ALAS! the Ram showed no errors in memtest86 and Prime95. I was shell shocked.

Now you ppl tell me is the CPU the culprit for all this??? I think the memory controller of the CPU is damaged some how or is not working properly.

Anyways if the above stated conclusion is true what wud I say for the replacement of the CPU to the dealer??? I mean he won't understand the technical terms as Memory controller on dies, etc.???

I also plugged My Corsair XMS PC4300 DDR SDRAM sticks which are rated 2-2-2-5 at 200Mhz DDR and again memtest shows errors (which worked at 240Mhz DDR at same sttings in my Board)!! What this indicates??

Again the his RAM Sticks are rated to work at 2.60V but when the auto setting is used in BIOS for Vdimm it selects 2.70V?? What a mess??

Anyways plz post up your view.


Could any of u TECHIES post any logical solution for this?

Am just gonna guide the guy in trouble to this post.

WILL NOT CLAIM ANY SOLUTIONS PROVIDED HERE AS MINE AND POST THE ANSWER IN THE OTHER FORUM.

 

[SNM]

EDIT: Okay, I'm totally wrong since this is a 754 system.
(Message left in to avoid confusion.🙂 )
I'm not totally certain, but I'm fairly positive it's the 3x256 configuration that's causing trouble. A64s are only supposed to have 1,2, or 4, aren't they?
Tell him to pull a stick and see what happens....unless somebody's already said it over there.

 

[RichUK]

Originally posted by: SNM
I'm not totally certain, but I'm fairly positive it's the 3x256 configuration that's causing trouble. A64s are only supposed to have 1,2, or 4, aren't they?
Tell him to pull a stick and see what happens....unless somebody's already said it over there.

thats incorrect, he using a ClawHammer (1Mb L2 cache), which is a Skt 754 form factor which means, that they only support single channel memory, therefore they have 3 slots for one channel (there is only three slots on the mobo), so occupying all three should not be a problem ..

😉

 

[RichUK]

1 .. you can not take the chip back if it worksfine at stock settings which it is supposed to (also with the default HTT of 200Mhz)


2 .. it is fine to pump 2.7 volts into the RAM (i take it the mobo is reading this off of the SPD), it would even be ok to pump 2.8 in with no damage.

I dont know if i could diagnose the mem controllers as the culprit, as you stated when you lowered the CPU multi, the RAM speeds and timigs were stable..

try using the dividers to reduce the RAM speed, and keep the raised CPU speed ..

 

[GuitarDaddy]

Overclocking the Ram in conjunction with the CPU puts a lot of stress and requires more CPU voltage on A64's because of the ondie controller. Your ram will always clock higher when your CPU mhz is reduced assuming the same CPU volts.