Bad RAM again!

[hafaphoto]

This is my 3rd set of Corsair CMX512 3200C2PT XMS3202v4.2 0504061-3 XMS3200 512MB 400MHz CL2 2x512 RAM. This RAM fails Prime 95 in one min or less! I have swapped the sticks, tried each one individually and they still fail...

 

With a company with your reputation, I suspected my motherboard, so I pulled one stick of another brand 512 ram out of my main computer, and everything worked great, P95 ran for an hour, no problems.

 

Oh yeah, the down computer is an Abit NF-7S, ATI 9250 card, Thermaltake PSU AMD 2500 XP.

 

I am running 2.5 3 3 11 timings, and like I stated, total stock on this one! I woluld try the RAM in my main computer, but it is watercooled, and o/c.

 

What do I do with this RAM???

 

 

Thanks for your time

 

E

[Wired]

Were you running the FSB @ 200 Mhz or 166 Mhz? Is the other memory spec'd at 166 Mhz or 200 Mhz?

[hafaphoto]

Were you running the FSB @ 200 Mhz or 166 Mhz? Is the other memory spec'd at 166 Mhz or 200 Mhz?

 

I had the FSB at 200MGz. Sorry about that, I guess I have been o/c so long I think that 200 IS stock! It is running P95 now with one stick of the Corsair, it has not failed after 15 mins, so that is progress.

 

FSB 166 mult 11.0 FSB:RAM Ratio Auto Mem timings Auto (3 3 3 7) Vcore 1.65v Vdim 2.6v. The Corsair says 400MGz, so I assume it is 200MGz, the other RAM I have is 3500 speed, I do not know the MGz of it.

 

So it looks like this ram is ok, just will not o/c. Well, unless you have any ideas on the o/c ability of this ram, my problem is solved.

 

Thanks

 

E

[RAM GUY]

Please try these settings and you can use http://www.memtest.org to test the system.

CPU Freq: 166 MHz

Memory Frequency: 100%

Dim Voltage to 2.7 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 6T

[hafaphoto]

Please try these settings and you can use http://www.memtest.org to test the system.

CPU Freq: 166 MHz

Memory Frequency: 100%

Dim Voltage to 2.7 Volts

Resulting Frequency: 166MHz

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 6T

 

 

Thanks for the info! tests look good and stable. Can the FSB be increased, or am I stuck at stock speeds?

 

Thanks for your time

 

E

[Wired]

Do you know how far that CPU can OC?

[hafaphoto]

Do you know how far that CPU can OC?

 

With some different RAM, I the chip would boot at 2.4GHz, but was a little hot and unstable. 2.3Ghz ran stable for around a year.

 

Thanks,

 

E

 

Oh yeah, the CPU is an AMD Athlon 2500 XP, with a stock speed of 1.83Mz.

[RAM GUY]

Well if that was with one module Verses a set of modules, you would be able to over clock more with just one module than you will with 2 and or in dual channel verses single channel because of loading on the memory controller.

[RAM GUY]

If you have an unlocked CPU I would set the multiplier to 9 or 10 and then increase the CPU Freq. slowly and see where it tops out.