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Overclocking 3700 A64

tcase max said 57C for me too. I'll give 2.8 a go :)



Edit: running at 2.8ghz (255x11) max load 52C. I set the vcore to 1.44 but it seems to be fluctuating between 1.44/1.46 in SpeedFan - Running fine so far anyway. I'll leave it there until I get hold of a better cooler. Cheers for the tips :)
 
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Argh tried priming at 2.9Ghz all seemed stable but it failed prime been dropping it down until it passes prime now i am back at 2.5Ghz as per screen shot ah well ill leave it for now until new cooler arrives wonder why i cant get higher than 2.5Ghz memory still has a fair way to go.
 
Mike UK said:
Argh tried priming at 2.9Ghz all seemed stable but it failed prime been dropping it down until it passes prime now i am back at 2.5Ghz as per screen shot ah well ill leave it for now until new cooler arrives wonder why i cant get higher than 2.5Ghz memory still has a fair way to go.
Click to expand...

What motherboard have you got and what timings are you running your ram at?? Also what v-core are your using?
 
Hiya the motherboard is a Epox 9NPA+ nForce4 ultra and havent changed the memory settings looking at the settings in bios they are at stock (memory is PC3200 geil value stuff)

Mike
 
Mike,

I have a very similar system to you.

I'm still working out the best overclock for my SD 3700+ but I can confirm that it is stable (Prime) at

250 x 11 (2.75GHz) at stock 1.4V

I've had it running upto 265 x 11 (2.915GHz) but haven't got round to confirm stability yet.

I have the same RAM - Geil Value.

This will run stable (Memtest) at 225Mhz, 2.5-3-3-7 (1T) with a slight voltage increase (2.65V).

However, because of the way the multipliers work, you can't have both the best RAM and best CPU - you need to compromise. I'm going to concentrate on the CPU.

You may be better off in this respect because your board has a 180 divider - mine doesn't (have to use 166) and I'm quite envious.

My cooling is just air and I'm using an Arctic Freezer 64 Pro - can't recommend it enough

My CPU temp after running an 8 hour Prime torture test at 2.75GHz is 34degC

Cheers,

Nigel
 
Mike UK said:
Hiya the motherboard is a Epox 9NPA+ nForce4 ultra and havent changed the memory settings looking at the settings in bios they are at stock (memory is PC3200 geil value stuff)

Mike
Click to expand...

Might be worth putting a big divider on your ram, and slacken the timings right off to rule out the ram holding you back, then when you find the max the cpu will go work on getting the ram back up to speed and stable. Thats how I had to do mine, as even though I run a 166 divider with the ram now sitting at 200mhz I still had to slacken off the timings to get it stable. Some boards dont like dividers as much as others so slackening off the timings is the way around it.
 
Currently clocked at 2.640Ghz with an 11x multiplyer and HTT at 240 before this failed prime in the first hour so i increased vcore to 1.5v and now its just completed 13 hours of prime 95 so I would say its stable enough.

Got a AC freezer coming in the post ill whack that on and while i am there remove the chipset cooler clean it up and put some artic silver on it :)
 
I guess that individual CPUs vary slightly but I think you should do well with the Athlon 64 Freezer Pro.

I haven't finished pushing my CPU ...

This morning it had completed 7 hours of PRIME95 Torture at 11x260 (2.860GHz) @1.45V.

I've left it running at 11x265 (2.915GHz) @1.45V whilst I'm at work. I don't expect it to pass at that voltage but am confident it will do with some extra volts.

My target is 11x270 (2.970GHz) - from reports, my MoBo isn't stable much beyond 270.

My memory is the same as yours and has proved stable at 225Mz. However, because of the way the dividers work I am unable to acheive this with the clocked CPU.

This is because I only have a 166 divider which works out at 11/14.

So my best memory speeds would be

250 - 196
255 - 200
260 - 204
265 - 208
270 - 212

If I had a 180 divider then the following would also be possible

250 - 211
255 - 215
260 - 220
265 - 224
270 - 228

This is why I am envious of your 180 divider - if I am lucky I will be able to get 270x11 and I will be happy with 212 RAM speed. But if I am only able to get 260 or 265 then the 180 divider would be really nice to have as I could run my RAM faster.

I'll keep this thread posted with how I get on.

Cheers,

Nigel

UPDATE
======
Looks like I am going to max out around 265x11 (2.915GHz) - it fails at 1.45V and 1.475V - now trying at 1.5V. Reckon I will get it working but probably won't reach 270x11 (2.970GHz).

265x11 (2.915GHz) is PRIME stable at 1.5V
 
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Best I have managed so far is 2.6Ghz 11x multi and a 166 memory divider using 1.5v.

If i add another 5fsb it fails prime tried dropping the divider right down so there wasnt any stress on the memory and still failed picking up the 64 freezer tomorow so it looks like its going to be more volts temps were around 55c full load at the minute.

Any ideas what could be holding me back apart from voltage? I want 3Ghz! lol :D

Mike
 
Well my Freezer 64 Pro turned up today. Its dropped my load temp by about 8 degrees. Currently doing some stress tests @ 2.8ghz/255x11 (corsair value ram) 1.46 vcore, seems stable so far. Been having an odd problem though. The comp runs fine all through the day, I turn it off for the night, the next day I go to turn it on.....it all powers up.....but all I get is a black screen, and I have to reset the bios. This has happened 2 mornings in a row. I dunno if its due to overclocking/stability or what, but its wierd how it runs fine all daytime no probs. It's just when I go to turn it on the next day...
 
Any ideas what could be holding me back apart from voltage? I want 3Ghz! lol
Click to expand...

As I said before, we have the same CPU and same Ram.

At that divider and HT frequency I don't think your Ram is being stretched. So the problem is down to the CPU or possibly the MoBo.

Assuming the CPU it's either

(a) Luck of the draw - you haven't got a good clocker

(b) Cooling - I reckon the Freezer Pro could make a big difference

I don't think you will get 3.0GHz though.

I've settled on 265x11 (2915) @ 1.5V - it's nice and stable on PRIME and playing Oblivion.

To get 270x11 (2970) I reckon I would have to push the volts higher than I would want - I just don't think 273x11 (3GHz) would be possible.

BTW I decided to increase my HyperTransport from x3 to x4 (1060) and it's working fine.

One thought - you have dropped your Hyper Transport multiplier to a safe value (x3) whilst trying your overclocks?

Cheers,

Nigel
 
Finally got around to installing my artic cooler 64 the other day what a mess on! when i changed the direction of the heatsink the socket mount fell out and i put the hold clip together completley the wrong way around took me a couple of hours to figure that out ended up having to apply cermaneque in the end think somethings not right though getting temps higher than my stock heatsink currently around 40c checked the stepping it is a KAB2E :)

I havent given up yet :D

Mike
 
well im a slight newbie to overclocking, does anyone have a guide thats real good with pictures so that im sure of what im doing before i go ahead and do it. i have a skt am2 3800+ single core on stock cooler. any information for overclocking in this area will be much appreciated, then i can share with you my amazing results!!

EDIT: ahh real sorry im a doofus and dont read, theres a massive guide in the overclocking section, duh! still, any1 got a guide with images?
 
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