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A8N32-SLI Slow Memory Clock

K

krotchy

Golden Member
My A8N-32 did a terrible job of detecting timings on my G.Skill PC 4000 ram. The auto timings actually made it fail in memtest virtually immediately. I have manually set all the timings based off of g.skills documented settings. Now everything works running memtest86. to 100% with no errors.

The problem though is that according to CPUZ, my ram is running at 133mhz(CPU/15)!!! instead of the default 250mhz. However in my bios it says my RAM clock is 250mhz, and under memclock clock setting, i switched from auto to limit, and set the limit to 250mhz. Im running the latest bios 1103.

Could this be a CPUZ error, and is there another way to verify my speeds, or is my bios configured wrong?

If CPUZ is correct, then can anyone tell me what to change in my bios to make my ram run full speed. Because 133mhz is obscenely slow for PC4000 ram.

*edit* ok so aparently if i limit my memory to 200mhz, it runs at 200mhz. If i set it to 233, i get 143, and at 250 i get 133. Lowering the timing below 200 runs at whatever setting I choose. Any ideas why the timings of 233/250 do not run properly?

 
Well, I suppose this problem isnt really a problem anymore, as I upped my FSB to 255,and using a 200mhz memclock runs my ram at 255mhz. So this is pretty ideal. Also it is dual prime stable so everything is peachy.
 
Originally posted by: krotchy
*edit* ok so aparently if i limit my memory to 200mhz, it runs at 200mhz. If i set it to 233, i get 143, and at 250 i get 133. Lowering the timing below 200 runs at whatever setting I choose. Any ideas why the timings of 233/250 do not run properly?
Click to expand...

Because ASUS don't know how to program BIOS correctly. I have not been able to use any dividers above 200MHz on ASUS boards. Not that it really matters since most CPUs will OC better than RAM, however.
 
Originally posted by: krotchy
My A8N-32 did a terrible job of detecting timings on my G.Skill PC 4000 ram. The auto timings actually made it fail in memtest virtually immediately. I have manually set all the timings based off of g.skills documented settings. Now everything works running memtest86. to 100% with no errors.

The problem though is that according to CPUZ, my ram is running at 133mhz(CPU/15)!!! instead of the default 250mhz. However in my bios it says my RAM clock is 250mhz, and under memclock clock setting, i switched from auto to limit, and set the limit to 250mhz. Im running the latest bios 1103.

Could this be a CPUZ error, and is there another way to verify my speeds, or is my bios configured wrong?

If CPUZ is correct, then can anyone tell me what to change in my bios to make my ram run full speed. Because 133mhz is obscenely slow for PC4000 ram.

*edit* ok so aparently if i limit my memory to 200mhz, it runs at 200mhz. If i set it to 233, i get 143, and at 250 i get 133. Lowering the timing below 200 runs at whatever setting I choose. Any ideas why the timings of 233/250 do not run properly?
Click to expand...

The new cpu-z (1.33) reports the right speeds for me. Older versions didn't. BTW, if you set the memory limit to 250, it actually runs around 240.
 
I set mine to 200 with the 1103 bios and it is running at 250 according to CPUz
I have my CPU FSB at 250 and the NB SB thing at 250 and my HTT at 4x.
I also had to set the memclock to "LIMITED" or the SOB would take my ram down to 133.

I have to say this bios is the SUCK imho but.... damn is it fast when you finally get to know all the ideosyncracies 🙂 <-----spelling WHOA!

This is my first AMD board in long while and even after educating myself about it I still find myself frustrated and OMG that bios jumper is the worst ever design I have ever seen. The engineer that designed the cmos header directly under the PCi Clip should die.

So.. set the memclk to LIMITED and have at it!!

Dave
 
Originally posted by: BATCH71
I set mine to 200 with the 1103 bios and it is running at 250 according to CPUz
I have my CPU FSB at 250 and the NB SB thing at 250 and my HTT at 4x.
I also had to set the memclock to "LIMITED" or the SOB would take my ram down to 133.

I have to say this bios is the SUCK imho but.... damn is it fast when you finally get to know all the ideosyncracies 🙂 <-----spelling WHOA!

This is my first AMD board in long while and even after educating myself about it I still find myself frustrated and OMG that bios jumper is the worst ever design I have ever seen. The engineer that designed the cmos header directly under the PCi Clip should die.

So.. set the memclk to LIMITED and have at it!!

Dave
Click to expand...

Sounds like in the end we both did the same thing. Limit memclock at 200. Up FSB to 250 (I did 266). However I left my SB/NB at 5x and 200 mhz. I figured there was no reason to overclock the hypertransport and then drop the multiplier. Im planning on leaving it this way until someone can tell me what the difference is.

 
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