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Request for support w/3700+ project

post #1 of 23
Thread Starter 
Hello all; this is my first ever post here and actually my first ever serious attempt at overclocking a system. I hope I am able to provide enough relevant information for the very knowledgeable among us to perhaps assist me in the right direction.

As it is I already have my new AMD 64 3700+ stable at 2.64ghz (240 x11, 1ghz HT x5), with 51c temp at full load after 20 minutes with SuperPi Mod (~44c at idle.) I am going to go pick up a beefy aftermarket air cooler to replace the stock fan I’m presently using as soon as I finish posting, so by the time you read this that much will have been taken care of already.

To start with, here are the essential specs of the system I am presently working with:

__________________________________________________

AMD Athlon 64 3700+ Socket 939

ASUS A8R32-MVP Deluxe
motherboard w/ATI CrossFire Xpress 3200 chipset & latest BIOS revision 0311 build date 03-07-06

Corsair Platinum Twinx CMX512-3200 LLPT (x2 paired) – XMS3200 400mhz DDR (Xms3205v3.1 – 0423040-3)

ATI Radeon x1900xtx (no crossfire at present.)

__________________________________________________ _

There are numerous overclocking options available in the system’s BIOS. I will list all pertaining to CPU, HT, and memory settings here. I list my present settings in bold, as well as the additional options that become available by changing these mainly stock settings.

JumperFree Configuration

Overclocking:

CPU Frequency: Currently 240
PCIE Frequency: Currently 110

FID/VID Change:

Processor Frequency Multiplier: x11
Processor Voltage: 1.4 (unable to set higher?)
DDR Voltage: [/b]Auto[b] (2.6-3.2)
Vcore Over-Voltage: Auto (disabled, +100mV, +200mV)
NB Over-Voltage: Auto (enabled, disabled)
Enabled:
Core Voltage (1.2v, 1.3v, 1.5v, 1.5v)
HT Bus Voltage (same options as above)
PCIE Voltage (same options as above)
SB Over-Voltage: Enabled (disabled, auto)

CPU Configuration

GART Error Reporting: Disabled
MTRR Mapping: Continuous (discreet)
Cool N’ Quiet: Disabled
HT Link Speed: 1ghz (auto, 200, 400, 600, 800mhz)

Memory Configuration

Memory Timing:

Memclock Mode: Limit (auto)
Value: 183 (100, 133, 166, 183, 200, 216, 233, 250)
MCT Timing Mode: Auto (manual)
CAS Latency (CL): Auto, 1.5, 2.0, 2.5, 3.0
TRAS: Auto, 5-15clk
TRP: Auto, 2-6clk
TRCD: Auto, 2-6clk
TRRD: Auto, 2-7T
TRC: Auto, 7-21T
TRFC: Auto, 9-23T
TRWT: Auto, 1-6clk
MCT Extra Timing Mode: Auto (manual)
TREF: 7.8us, 15.6us, 3.9us
DDR Input Strobe: Disabled (slower, faster)
Input Strobe Value
DDR Data Driving Strength: Disabled (15, 30, or 45% reduced)
Burst 20pt: Disabled (enabled)
User Configuration Mode: Auto (manual)
Read Preamble: 2.0-9.5ns, intervals of .5)
Asyc Latency: 4-11ns, intervals of 1)
CMD-ADDR Timing Mode: 1T, 2T
Bank Interleaving: Auto (disabled)
Burst Length: 2, 4, or 8 beats
Hardware Memory Hole: Disabled (enabled)

ECC Configuration:

DRAM ECC Enable: Disable (enable)
MCA DRAM ECC Logging: (disable, enable)
ECC ChipKill: (disable, enable)
DRAM Scrub Redirect: (disable, enable)
DRAM BG Scrub: (disable, 40ns, 80ns, 160ns, 320ns, 640ns, 1.28us, 2.56us, 5.12us, 10.2us, 20.5us, 41.0us, 81.0us, 163.8us, 327.7us, 655.4us)
L2 Cache BG Scrub: (same options as above)
Data Cache BG Scrub: (same options as above)

Hyper Transport Configuration

HT Link Speed: 1ghz (auto, 200, 400, 600, 800mhz)
CPU:RD580-NB HT Link Width: 16bit (auto, 8bit)
RD580 HT Link Three State: Enabled (disabled)
RD580 HT Drive Strength: Optimal (auto)
HT Receiver Comp. Ctrl: Optimal (auto)
RD580 HT PCC Control: High Speed (auto, low)

Well, that is all the information I can think of right at the moment.

The problem I seem to be having is that I can’t get past 2.64 at x11 and 240 without locking up. I am certain it has to do with getting the right memory divider/HT multiplier as well as other changes that need to be made to “loosen†my DDR configuration, none of which unfortunately I am able to sufficiently accomplish at my present level of understanding.

I cannot see where I would change the HT multiplier from 5x to 4x nor am I certain I would want to, though I imagine setting the memory frequency limit to 183 has this effect? Perhaps I need to set it to 166... All I seem to be able to do in BIOS is choose the target HT mhz/ghz rate.

Also, I am not entirely clear as to how the final DDR memory frequency is derived from the CPU frequency and HT configuration. I know the basic equation is memory frequency = cpu frequency / memory divider, however I am not certain where this is set and how it relates to the overall optimal configuration for speed and stability with my present hardware.

I have been using this to try and better understand:

http://math.gogar.com/a64ocbrowser.html

Ideally, I was looking to break 2.86ghz or higher with this chip, which I am encouraged by many posts here and elsewhere is quite possible with standard aftermarket air cooling.

I very much look forward to any specific suggestions as to a configuration that might get me there, taking the above into account.

Best regards,

J<
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post #2 of 23
Welcome to the forms.
take your HT and change it from 5x to 3x and raise vcore to like 1.45 for now. Watch temp though, keep at or under 50c. that aftermarket cool should help.
do you by any change know your stepping(its on the top of the cpu in the second line of numbers and letters).

EDIT: sorry just now saw part were you said you can't find where to change HT.
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post #3 of 23
Welcome to the forum, that's a very nice rig. It looks like you are well on your way to becoming a great overclocker considering your speed/temp with the stock cooling. If you get a new heatsink, everyone here will tell you to get a big typhoon (which I agree with). I believe you will be able to pull off a solid overclock after you upgrade. I am not sure about if your motherboard can give 1.4v+ to the cpu, but I'll do some searching. I don't know about the ram either, so hopefully someone else can help with that.
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post #4 of 23
Thread Starter 
Well, WMI says its x86 Family 15 Model 55 Stepping 2.

I'm still trying to figure out where to change the HT multiplier in the settings I posted above. Seems this board handles things a bit differently. Having trouble upping the vcore as well, though perhaps I can do that with SysTool if it comes to it (?)

When one says "change HT from 5x to 3x," my first question is 5 and 3 times what? How is this number derived, and how does it relate to the options I have which are to chose a set mhz rate? (See above.)

I will absolutely look into the Big Typhoon; with a name like that it probably lives up to the reputation! Is it a good idea to use Arctic Silver on this model chip? Can't see how it could hurt...

Thanks for the welcome and quick replies.
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post #5 of 23
alway keep your LDT value under 1000. You will find that the biggest factor on your maximum overclock is your cpu stepping.

QUICK! before you install that aftermarket cooler record the stepping information off of the IHS. The information you want should look like this " KAB2E 0548 FPMW" thats my stepping BTW.
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post #6 of 23
Quote:
Originally Posted by Cluster One
alway keep your LDT value under 1000. You will find that the biggest factor on your maximum overclock is your cpu stepping.

QUICK! before you install that aftermarket cooler record the stepping information off of the IHS. The information you want should look like this " KAB2E 0548 FPMW" thats my stepping BTW.
LDT=HT
The term LDT is only used in DFI BIOS. HT is the term for others. 5xFSB(so 240)=1200 3x240=720 or 4x240=960.
the goal is to keep under 1000, if not it will affect your systems stablility.

Quote:
Originally Posted by Sgaileach1
I will absolutely look into the Big Typhoon; with a name like that it probably lives up to the reputation! Is it a good idea to use Arctic Silver on this model chip? Can't see how it could hurt...
The Big Typhoon is a good aftermarket cooler, and yes, I'd use some Artic Silver 5.

EDIT: if the options in BIOS for HT are (auto,1000,800, 600,etc) then try setting it to 800
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post #7 of 23
Thread Starter 
Interesting...

Well, after much experimenting it appears as though I’ve hit a wall with my 3700+ CPU, at least from what I have been able to deduce.

Initially, my first stable OC was achieved as mentioned at 240fsb x11 @ 183mhz memory divider, which is somewhat non-standard but available on my board, which resulted in a 2.63ghz clock at ~212mhz memory speed. (This is a very rough estimate since the A64MemFreq calculator I use doesn't compute 183mhz dividers.)

This worked well in all benchmarks though attempts to inch away from it resulted in instabilities. I first came to the conclusion that it must be a CPU limitation when attempting to run 255fsb x11 @ 166mhz memory divider, which would have been my target 2.8ghz and right at 200.4mhz on the memory. Should have been perfect, but alas, the system wouldn’t post!

Why, I wonder?

Experimenting more towards a compromise on FSB and memory rate on a processor clock that would post, I came upon 250fsb x10.5 @ 166mhz memory divider, which resulted in my present stable benchmark at 2.63ghz and 201.9mhz on the DDR.

I am satisfied with the noticeable performance boost this brings to 3D applications; however I would still like to know why I am unable to push it that extra yard, particularly when I am only maxing 52 degrees celsius at my present stable bench? Perhaps the core requires more volts which I am unable to provide via my present motherboard BIOS, which apparently has the Processor Voltage hard-locked at 1.4-1.45.
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post #8 of 23
Thread Starter 
Can anyone think of a reason why I am unable to get the following to post with the above listed specs?

255 ref x11 multiplier @ 166mhz memory divider = 2.8ghz and 200.4mhz DDR

I mentioned the RAM I am using above; these are the values the system auto-detects for it, which I have not changed:

CAS: 2.0
TRAS: 5 clk
TRP: 2 clk
TRCD: 3 clk
TRRD: 2 clk
TRC: 10 clk
TRFC: 12 clk
TRWT: 3 clk

System just hangs with the num lock light locked, and I have to cold boot to get back into the BIOS.
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post #9 of 23
Quote:
Originally Posted by Sgaileach1
Can anyone think of a reason why I am unable to get the following to post with the above listed specs?

255 ref x11 multiplier @ 166mhz memory divider = 2.8ghz and 200.4mhz DDR

I mentioned the RAM I am using above; these are the values the system auto-detects for it, which I have not changed:

CAS: 2.0
TRAS: 5 clk
TRP: 2 clk
TRCD: 3 clk
TRRD: 2 clk
TRC: 10 clk
TRFC: 12 clk
TRWT: 3 clk

System just hangs with the num lock light locked, and I have to cold boot to get back into the BIOS.
Did you try setting your HT to 800? Also what voltage is the cpu at.
You can fill out your system specs in quick links(top left of this page), that can also help us to help you.
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post #10 of 23
Quote:
Originally Posted by Sgaileach1
Can anyone think of a reason why I am unable to get the following to post with the above listed specs?

255 ref x11 multiplier @ 166mhz memory divider = 2.8ghz and 200.4mhz DDR

I mentioned the RAM I am using above; these are the values the system auto-detects for it, which I have not changed:

CAS: 2.0
TRAS: 5 clk
TRP: 2 clk
TRCD: 3 clk
TRRD: 2 clk
TRC: 10 clk
TRFC: 12 clk
TRWT: 3 clk

System just hangs with the num lock light locked, and I have to cold boot to get back into the BIOS.
For now its best to just leave the timings alone on your ram. That corsair (same as mine) lists as using 2.75 v, change that to around 2.8 under ram voltage. Mobo have diffrerent ways they label the HTT multi. It comes stock at x5 but when you oc you have to lower it to x4. Now it seems on your mobo its lists this as the HT linkspeed. Its under the hyper transport configuration. Your options are 1000, 800, 600 and so on. So set it at 800 until you ge to past 250 FSB then lower it down to 600 when you get to over 250 FSB. This in turn keeps it below 1000 total. There prob has to be a key stroke or an option to enable in your bios to get over 1.4vcore. You cps just might need some more voltage. Watch your temps so they dont go over 50c load. I google around to see how to enable that vcore option for you. Post back with any more questions.
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