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cant reach high mults 1700...possible ram problem?

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  • CPUs
  • RAM
  • Overclocking
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July 13, 2003 6:21:36 AM

As a first time overclocker, I'm seeking the veterens' help...

I'm running an A7N8X Deluxe Rev2.0 and 1700+ DUTC3 JIUHB. I can't use a multiplier above 12.5. There are options for much higher, however whenever I do the board seems to want to cut the multiplier to below 8 or so. Is there a solution to this problem?

Second question is I'm Running Corsair XMS PC2700 2 x 512. When I bootup from my computer being off, I get a "system memory test failed." Soon after a few start ups, the bios resets to defaults to help recover. But then i switch the RAM and CPU timings back and I get a clean start. I ran prime95 for 4+ hours without errors with my specs, which I will post below. Idealy, I'd like to press on the FSB instead of the muliplier, therefore putting my RAM to test. But I'm afraid this could be a CPU problem as well. Could my RAM be faulty? Am I pushing either the CPU or RAM too much? How high can my PC2700 RAM go with CAS2.0? Should I switch to 2.5 with the type of pushes I do?

I guess my goal is to reach 2200mhz stable. I will stop overclocking at 2300mhz. If anyone can help in any way, I'd greatly appreciate it. I welcome the veterens' wisdom!

PS- Sorry about the RAM question. I just didn't want two different posts.

A7N8x Deluxe Revision 2.0 BIOS 1005
XP 1700+ DUTC3 JIUHB @ 2250mhz vcore 1.85
2 x 512MB Corsair XMS PC2700 11-3-3-CAS2.0 vdimm 2.8
Cooler Master Aero 7+ @ 3500 RPM /w 51 load & 46 idle
Cooler Master ATC-111-SX1

<P ID="edit"><FONT SIZE=-1><EM>Edited by heylookitsjerry on 07/13/03 08:57 PM.</EM></FONT></P>

More about : reach high mults 1700 ram problem

July 13, 2003 8:25:56 AM

If your getting memry problems at FSB's over 166 then the timings on the memory need slacking off. Try 3,3,3,8 or something but really it would be better to get some twinmos 200mhz as im running mine at 199mhz @ 2,3,3,6 with no problems...

The reason u cant get higher multi's is because only a select few motherboards unlock ALL the multipliers.

<A HREF="http://service.futuremark.com/compare?2k1=6719742" target="_new"> MY RIG </A>
<A HREF="http://service.futuremark.com/compare?2k3=996846" target="_new"> 3D-03 </A>
<font color=red> 120% overclocker </font color=red> (cheapskate)
July 13, 2003 6:05:05 PM

Only Gigabyte, and Abit mobos unlock the multiplier, with the a7n8x the highest u could go is 12.5 multiplier.

I hate Computers! I could only overclock my Barton 2500+ to 2580mhz(vcore 1.65). My Radeon 9700pro core/mem speed won't go above 410/720. I really hate computers!
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July 13, 2003 6:09:29 PM

first of all, the A7N8X unlocks the multi, so disregard what speeduk said.

Second, I think you got sucky RAM. YOu should have at least considered PC3000 or better yet PC3200 cause a PC2700 will only support DDR333 and overclocking memory is not so nice as OCing a cpu chip. Your timings suck as well. I am running some kingston PC3000 @ 196 2-2-2-6 with 2.7V.

Your A7N8X will EASILY support 200 MHZ with prime statbility. 4 hour stability is DECENT, but I like to have at least a 12+ hour stability. Run Sandra burn in and see how many loops you can do.

Tell us what multi x FSB you're running your chip at. I also have a JIUHB DUT3C and I was able to hit 2.25 Ghz full stability. 2.3 Ghz + seemed be a wall for me. But I have since broken my equipment in, so maybe I can now hit 2.3 Ghz + I don't know. My Vcore is at 1.6V and i can hit 2.25 Ghz. I don't want to go 1.8V CPU and 2.8V mem cause that will result in a toaster which i don't want to do.

I don't know why your mem timings suck, or how you're not reaching your desired speed. These chips GUARENTEED 2.2Ghz chips so I'm not sure what your problem is. Also, DL memtest86, as that is the most kickass memory tester program.
July 13, 2003 6:10:26 PM

Like I said NF2 chipsets unlock multi's. So it's NOT JUST gigabyte and Abit....
July 13, 2003 6:14:32 PM

You can cut the 3rd and 5th L3 bridges on Tbred B XP1700+. This will change the default multiplier to 13x and will activate the high multipliers.

Alternatively you can do a wire mod to activate the 8x multiplier bit (similar to cutting the 5th L3 bridge).

Of the wire mods the socket mod is the easiest. Just drop in a fine wire strand to connect socket holes AJ27 to AH28 (Vcc or VCore). This pulls the 8X bit HI opening the higher multipliers.

See link below for mod information (middle of page).

<A HREF="http://www.beachlink.com/candjac/Workarounds.htm" target="_new">http://www.beachlink.com/candjac/Workarounds.htm&lt;/A>

<b>56K, slow and steady does not win the race on internet!</b>
July 13, 2003 6:51:01 PM

without physical modding to the chip, the A7n8x doesn't unlock the multiplier, i personally own one. The highest i could push the multiplier is 12.5

I hate Computers! I could only overclock my Barton 2500+ to 2580mhz(vcore 1.65). My Radeon 9700pro core/mem speed won't go above 410/720. I really hate computers!
July 13, 2003 10:06:34 PM

Hey thanks for all the replies. I really appreciate it.

Yea...i was coming to the conclusion that my RAM couldn't cut it anymore as well. I used to be running at 5-2-2-CAS2 for awhile but I read a post with proven results that 11 runs faster on nforce2 boards. I still dont completly understand memory timings just yet, so over clocking ill probably run them a little lower in order to try to reach the higher FSB.

fo_sho: I did get to 2.3ish but wasn't running stable. I was able to hold my own at 2250mhz after about 4 hours with prime95. But i when i went to turn on my computer after being off for a few hours, i couldnt post until the board reset defaults. Then, I was put all my timings back and i was able to run smooth again.

Anymore help would again be greatly appreciated.

Thanks for all the help again.
July 13, 2003 10:09:03 PM

OH i forgot...

I'm running 185*12.5...this ran ok until i wanted to turn on my computer. Could restart fine.
July 13, 2003 10:40:35 PM

What's your vcore at?

I hate Computers! I could only overclock my Barton 2500+ to 2580mhz(vcore 1.65). My Radeon 9700pro core/mem speed won't go above 410/720. I really hate computers!
July 14, 2003 12:29:56 AM

My vcore was at 1.85 trying to solve the mystery of it all. I think I will turn it down as it hasn't seemed to fix the problem.

vcore: 1.85 @ 185
vdimm: 2.8 @ 185 (Corsair warranties ram up to 2.8)
July 14, 2003 3:35:59 AM

Just to update everyone...

I ran Sandra 2003 at 180*12.5 with vcore 1.85 and vdimm 2.8. I did 10 cycles of their burn-in test and came out alright. But then i powered down and turned back on only to a reset to defaults. Turned settings and timings back up and got same results with another 10 cycle test with Sandra.

HOw many cycles of the burn in test should i do to confirm that my system is stable?

Again, thanks for all the help.
July 14, 2003 4:48:50 PM

Quote:
Like I said NF2 chipsets unlock multi's. So it's NOT JUST gigabyte and Abit....

Sigh... actually that depends on the case, I haven't heard of a single nForce2 mobo that ALWAYS unlocks ALL multipliers. In some case they do, in other they don't... so don't start yelling at someone if it works for you but clearly doesn't work for someone else.

I love my Delta 60HP 7000 RPM fan that puts out more dB then CFM :eek: 
July 14, 2003 4:51:41 PM

Well you only want to test CPU and mem stability (which are short tests), so say run it for 30-50 loops and only select the CPU and memory benchmarking test and not the HD ones (because in the time the HD is being benched the COU can cool down again).

Another great CPU stability testing app is Prime95, a very good memory testing program is Memtest86. IMHO they're better then SANDRA as they clearly show errors.

I love my Delta 60HP 7000 RPM fan that puts out more dB then CFM :eek: 
!