help overclocking AMD 3400+

April 18, 2009 at 15:10:11
Specs: Windows XP
I can't afford to buy any new stuff.. so I was thinking about overclocking my build now. I've never OC anything before and don't know how, and need some advice possibly on how much I can do with stock cooling. I was sure of what my specs were exactly so I took screen shots of my info from SIW and cpuz. screenshots include of my cpu, mainboard, memory, and video, and on cpu'z the speeds of each memory slot.

screen's from SIW:

and screen's from cpuz

any help would be appreciated on this, although I don't want to blow up my computer. Thanks!

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April 18, 2009 at 17:48:24
You can't blow up your computer by overclocking. Couldn't you have just posted your specs instead of 11 links?

Can't help much without the model number of your motherboard. Don't you have a manual for it? Gigiabyte only made a few boards based on ULi chipsets so you *probably* have a GA-K8U but I'm not gonna bother downloading the manual & looking over the BIOS chapter unless I'm sure it's the right board.

Other than that, you have a socket 754 A64 3400+ with 768MB (3 x 256MB) RAM & a Radeon X850 AGP video card.

Got a good power supply?

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April 19, 2009 at 10:17:14
mobo is:

GIGABYTE GA-K8U 754 ULi M1689 ATX AMD Motherboard

ram sticks include:

mushkin 1GB 184-Pin DDR SDRAM DDR 400 (PC 3200) Desktop Memory Model 991130

mushkin 1GB 240-Pin DDR2 SDRAM DDR2 400 (PC2 3200) Unbuffered System Specific Memory Model 971338K - Retail

power supply:

Antec Performance Plus PLUS1080AMG Metalic Gray 1mm SECC Steel Server Computer Case 430W TruePower Power Supply


AMD Athlon 64 3400+ ClawHammer 2.2GHz Socket 754 Processor Model ADA3400BOX

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April 19, 2009 at 12:54:51
I just had a look at the BIOS chapter of the manual for the GA-K8U & there aren't many overclocking options available. There's no way to control the AGP, RAM or HyperTransport buses from overclocking along with the CPU, so your results are gonna be very limited. All you can do is enter the BIOS, go to the Frequency/Voltage Control menu, then raise the CPU clock a little at a time & see what happens.

Start at 205MHz, save the settings & exit, then boot into Windows & test for stability using OCCT.

If all is well, go back to the BIOS & bump up the CPU clock to 210MHz, then repeat the above process. Continue like this until your system becomes unstable. At that point, you have the choice of backing off to the last stable setting or increasing the CPU voltage & trying for more. If at anytime your system becomes unbootable, use the clearCMOS jumper to reset the BIOS (unplug the power cord 1st), then start from scratch.

I just noticed that something's not right with your RAM configuration. I misread the SIW report as 768MB, but you list 2GB (2 x 1GB). CPUZ shows 2GB but it's running at 1/2 speed...100MHz instead of 200MHz. But then if you click on the other CPUZ links that show the individual sticks, it lists two as 512MB PC3500 & one as 1GB PC3200. Running 3 sticks will automatically underclock your RAM. Unfortunately, it's a limitation of the memory controller built into the CPU & there's noting you can do about it. And I believe the RAM underclocking will also occur with two sticks if they're both double sided.

Try sorting out the RAM issue before overclocking. Remove all sticks but one, then boot into Windows & run CPUZ...see if the RAM speed is back up to 200MHz. If it is, add a 2nd stick, run CPUZ again & see what speed it's running at.

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April 19, 2009 at 20:24:08
I've been messing with it a bit now.. at the moment I've got it at these settings, and its running stable:

CPU clock ratio at 10x
CPU clock 232
CPu overvoltage at +5%
memclock at 100

I cant get the memclock higher with all 3 sticks in it seems, I tried taking some out and I can get it up to 200 with just 1 GB in, but I figured I'd be better off with 2gb at half speed rather than 1GB at full speed, kindof guessin though on that.)

with these settings its runnin at 2330.. so I'm gettin a little boost at least.

I'm still unsure what to really do with the ram though

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April 20, 2009 at 05:29:33
Why did you lower the CPU multiplier? There is no FSB so you gain nothing by raising the CPU clock while lowering the multi. Performance-wise, 10 x 232 is exactly the same as 11 x 211...however, 10 x 232 may not be as stable.

As for the memory, there's no way to get it to run at full speed with 3 sticks. With you current settings, it should be running at 116MHz. Did you try with just 2 sticks to see what speed it will run at? My guess is it would run at approx 193MHz. IMO, 1.5GB at 193MHz is better than 2GB at 116MHz.

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