FX-57 Post Problems

[Neslepax]

Hey there! As this is my first post in this forum, it might as well be something interesting.

I just recently hooked up a water cooling system to my AMD FX-57 on an A8N-SLI Premium motherboard. For some reason, it will not post if I change the multiplier above the standard of 14 (even 14.5 refuses to post). I was under the impression that the FX line of chips were not top locked? I've tried increasing the voltage from 1.4 to 1.5125 on the processor, and 1.5 to 1.6 on the chipset, and it still will not post. However, ASUS automatic OCing BIOS feature overclocks fine at 5/8/10%. However, it does not change the multiplier, only the bus speed (from 200 to 220). I'm not too fond of this method, because my ram gets rather hot.

With the Asus automatic OCing feature, I've been able to reach ~3080mhz at ~33c under load. Is there any way to do this with the multiplier, rather than the bus? I know the chip has a lot more potential, I just don't know what I'm doing wrong. Thx for any suggestions!

Rig:

AMD FX-57 (2.8ghz stock, San Diego)
ASUS A8N-SLI Premium
Corsair XMS 512x2 (2-3-2-6)
Dual 7800GTX

[Piotrsama]

Yes, CPU multi is unlocked on the FX series.

Try OCing in Windows, not from BIOS.
Use A64Info or other program to OC on the fly.

[Neslepax]

If the CPU multiplier is unlocked, why am I having difficulty when increasing it by .5 in BIOS?

[tictac]

set your memory ratio 1:1 to the cpu htref. then try again your fx with higher multi.

[Neslepax]

set your memory ratio 1:1 to the cpu htref. then try again your fx with higher multi.

Where exactly do I set this? I scoured the BIOS for anything referring to a 1:1 memory ratio, or anything named "htref" and came up empty?

[LIKMARK]

probably called memory frequencies/memory clock, set it to 266 or 333, that means you're running your memory at lower speeds.

[Neslepax]

Thx! 333 produced the same problems, but 266 finally allowed me to change the multiplier. I'm at 15x202.05 = 3030.81mhz, 28c idle.

What will the impact be to gaming (or performance in general) with my ram reduced to 266 from 400?

[LIKMARK]

Actually your ram ain't running at 266MHz, its the divider. Download Cpu-z and you'll see the ram frequency. The impact of running your ram at lower speeds than DDR400 is next to nothing in games. You'll only see lower performance in benchmarks.