Neo2 Platinum & 3200+ Venice OC

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Stokes

Senior member
Apr 20, 2005
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I've been following the guide given for overclocking an A64, which has been extremely helpful for me.

I found that at 1.52V, I'm just about stable at 2650Mhz. I am going to run prime95 for the 12 hours right after I type this up. Does that speed seem right for my processor? I am cooling this with an xp-90. Temperature at this never gets above 40C while doing Prime95. The next voltage puts me up in the 1.56-58V range and gets me 2.7Ghz or so. I haven't really explored that just yet. I'm little hesitant to up the voltage without some more knowledge from others. When I tried going 2.7Ghz on the 1.52V or so I got the blue screen of death but that went away when I put the FSB down to around 267.

And the second problem, I finally got my ram to run Dual channel (dimms were in wrong slots). So I was about to go see what I can get from my memory except when I changed the Mhz from 100 to 200, the system would not boot for me. I would have to power it off then power back on and then it would go, except then my mhz dropped down to 2ghz. I even tried lowering the FSB even more and it still would not boot the first time until i downed that Mhz to 100.

What do you recommend I do about the RAM?

And how am I doing so far for my overclock? Is that 2650Mhz where I'm probably looking to stay at?
 
n7

n7

Elite Member
Jan 4, 2004
21,281
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That's very nice, especially since i assume you are running that RAM @ 1:1.

If you wanted a higher OC, you could bump up the vcore slightly & run a RAM divider, but in your case, i wouldn't, since 2650 MHz is great, & you'd have to run the RAM at a much lower speed then.
 
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Stokes

Senior member
Apr 20, 2005
510
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0
Originally posted by: n7
That's very nice, especially since i assume you are running that RAM @ 1:1.

If you wanted a higher OC, you could bump up the vcore slightly & run a RAM divider, but in your case, i wouldn't, since 2650 MHz is great, & you'd have to run the RAM at a much lower speed then.
Click to expand...

So are you saying I leave my ram the way it is? With 100mhz (technically 132 from FSB) and leave my 2T and default timings? which appear to be from cpu-z:

2-2-2-5

although that sounds really good and I didn't think my ram was that good lol.
 
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Duvie

Elite Member
Feb 5, 2001
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It geils what do you expect...

No if he is running 100 then he is runing a 2:1 divider....

Why dont you try the 166?? 200 or 1:1 would make it 530ddr and you would likely need to be running 2.85v (th ehighest the board will go) and maybe some more....

166 would out you in the 440ddr range...perhaps even a 133 divider but it is a low 355ddr....
 
B

Bona Fide

Banned
Jun 21, 2005
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Leave it at 2650, or even drop it to 2600 if you want. 2-2-2-5 timings are great for any kind of RAM, so you might not even want to bother tweaking it unless you want to increase it past DDR500. :)
 
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Duvie

Elite Member
Feb 5, 2001
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You likely with geil sticks cant run 2-2-2-5 let alone much of any cas 2 above 440ddr....

with a 166 divider I bet 2-3-3-8 or perhaps 2-4-4-8 may be what it takes...
with a 133 divider you should be able to run 2-2-2-5...
 
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Stokes

Senior member
Apr 20, 2005
510
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Originally posted by: Duvie
You likely with geil sticks cant run 2-2-2-5 let alone much of any cas 2 above 440ddr....

with a 166 divider I bet 2-3-3-8 or perhaps 2-4-4-8 may be what it takes...
with a 133 divider you should be able to run 2-2-2-5...
Click to expand...


which of these options is the better choice for gaming?
 
n7

n7

Elite Member
Jan 4, 2004
21,281
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Oh man...your RAM isn't running 1:1...as Duvie noted, it was running 2:1...ugh

Try loosening your timings while bumping up the CPU a bit till it hits its max.

Then either drop the CPU down a bit to match the RAM's max with tight timings, or leave the CPU higher with looser RAM timings, depending on what you find your CPU max & RAM max to be.
 
n7

n7

Elite Member
Jan 4, 2004
21,281
4
81
Originally posted by: Stokes
Originally posted by: Duvie
You likely with geil sticks cant run 2-2-2-5 let alone much of any cas 2 above 440ddr....

with a 166 divider I bet 2-3-3-8 or perhaps 2-4-4-8 may be what it takes...
with a 133 divider you should be able to run 2-2-2-5...
Click to expand...


which of these options is the better choice for gaming?
Click to expand...


I'd try the 166 divider first.
 
D

Duvie

Elite Member
Feb 5, 2001
16,215
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gaming like bandwidth more then most apps..I would run the 166 unless I couldn't get cas 2 to work at all then perhaps even lower spped the 2-2-2-5 would beat the 440ddr cas 2.5...that may take some specific testing on your part...
 
Xcobra

Xcobra

Diamond Member
Oct 19, 2004
3,675
423
126
too bad my venice 3200 is not even stable at 2.5!!!!??? can you believe that???!!! prime95 fails after 3 1/2 hours of running...ive tried every single combo there is in the bios but no go....:(
 
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SrGuapo

Golden Member
Nov 27, 2004
1,035
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Originally posted by: Xcobra
too bad my venice 3200 is not even stable at 2.5!!!!??? can you believe that???!!! prime95 fails after 3 1/2 hours of running...ive tried every single combo there is in the bios but no go....:(
Click to expand...

What voltage? Ar eoy uusing Zebo's Ocing guide? YOu can't just set random speeds and pray. You have to isolate each component (motherboard, CPU, RAM) and find there max speed . Then use those numbers to find the best speed...
 
Xcobra

Xcobra

Diamond Member
Oct 19, 2004
3,675
423
126
Originally posted by: SrGuapo
Originally posted by: Xcobra
too bad my venice 3200 is not even stable at 2.5!!!!??? can you believe that???!!! prime95 fails after 3 1/2 hours of running...ive tried every single combo there is in the bios but no go....:(
Click to expand...

What voltage? Ar eoy uusing Zebo's Ocing guide? YOu can't just set random speeds and pray. You have to isolate each component (motherboard, CPU, RAM) and find there max speed . Then use those numbers to find the best speed...
Click to expand...

dont think im a noob at this...i know what to do...2.5 @ 1.55Vcore and no go max ive tried is 1.65 but still nothing...i got G Skill PC4400LE and it can do 300+ and Max HTT is about 300x3 but no go :(
EDIT: im at 250x10 1:1 devider with Ram @ 2.9Vdimm 2.5-3-3-7...after three hours prime fails...
 
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Ike0069

Diamond Member
Apr 28, 2003
4,276
2
76
Originally posted by: Stokes
Originally posted by: Duvie
You likely with geil sticks cant run 2-2-2-5 let alone much of any cas 2 above 440ddr....

with a 166 divider I bet 2-3-3-8 or perhaps 2-4-4-8 may be what it takes...
with a 133 divider you should be able to run 2-2-2-5...
Click to expand...


which of these options is the better choice for gaming?
Click to expand...

Since you have DDR 500 RAM, I'm guessing the 166 will work. Just slightly loosen the timings as Duvie suggested and it should be fine.

 
I

Ike0069

Diamond Member
Apr 28, 2003
4,276
2
76
Do you still have the RAM at default voltage?
Since it's normally CAS 2.5, you'll need to up the voltage to get it ti run at CAS 2. Try taking it to 2.7V and see if that works. You might even need to use 2.8V.
 
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Stokes

Senior member
Apr 20, 2005
510
0
0
I'll give 2.7V a try. So I'm thinking to try:

166 @ 2-3-3-8

Do you guys think its a good idea to up the voltage? and how much higher is recommended for my heatsink? At the 1.52V I was looking at 29C idle and 34C under prime95.

 
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Ike0069

Diamond Member
Apr 28, 2003
4,276
2
76
You're fine with load temps up to about 60C. So you have nothing to worry about there.
Try getting the RAM to run stable at the current OC. Just play with the timings and voltage and you should get that to work.

After you figure out the RAM, you can always try to up the HTT some more to increase the CPU OC, but you'll have to loosen the timings even more, or drop to 133. But depending on your final CPU speed/HTT, going to 133 may be as good or better.
Don't forget you can always drop the multiplier to 9X (or lower if needed) and raise the HTT to offset dropping the RAM divider. This is where Gogar's Athlon 64 OC Optimizer really comes in handy. :)
 
S

Stokes

Senior member
Apr 20, 2005
510
0
0
Ok little update guys:

I found that with 10x and 265 FSB on 1.52V, Prime95 only completed about 3 hours. Which was dissappointing cause that is what should have worked. So I upped the voltage and now I'm at 1.65V which seems like too much and I'm running 265 FSB x10 and it appears to be doing just fine except load temp rises to 56C, which is ok, but undesirable.

Is this really all I can get out of my CPU? What are my options from this point.
 
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bjc112

Lifer
Dec 23, 2000
11,460
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Originally posted by: Stokes
Ok little update guys:

I found that with 10x and 265 FSB on 1.52V, Prime95 only completed about 3 hours. Which was dissappointing cause that is what should have worked. So I upped the voltage and now I'm at 1.65V which seems like too much and I'm running 265 FSB x10 and it appears to be doing just fine except load temp rises to 56C, which is ok, but undesirable.

Is this really all I can get out of my CPU? What are my options from this point.
Click to expand...

Why go from 1.52 to 1.65?

Go with less than that..
 
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Ike0069

Diamond Member
Apr 28, 2003
4,276
2
76
What other voltages did you try?
If it does take 1.65 and you are at 56C, then that will probably be you max Vcore. But you may still be able to up the speed some at that voltage.

Don't be upset if you "only " get a 33% OC. That is still excellent. :)
 
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imported_wyrmrider

Senior member
Dec 6, 2004
204
0
0
How much air is that silent fan moving
try a fan out of an old ps to see if it makes a difference
you can always use a more powerfull fan on a reostat
case cooling ok, memory, chipset, etc?
 
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