So what do you think is the problem? (2.4c OC)

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aggressor

Platinum Member
Oct 10, 1999
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Abit IC7-G with 113 BIOS
2x512mb of Twinmos Windbond CH5 chips
2.4c @ 3.0ghz at default voltage with 250mhz FSB and 5:4 ratio.

At 1:1 ratio, I can push the FSB\Memory to 225mhz.
At 5:4 ratio, I can only go to 250mhz before the PC is unable to boot (Not even to POST screen). I've tried putting the CPU voltage up to 1.7, and that didn't help.
at 3:2 ratio, 255mhz works somewhat, it boots, but if I restart it won't go to the POST screen.

So, do you guys think I just got a not-so-great-for-overclocking P4? (I'm thinking about picking up another one to test, but I don't really want to :().

I propbably wouldn't even ask, but I thought it was weird how it would do 3.0ghz @ default, and not any higher even when putting up the voltage.

Also, I noticed theres a ton of settings for memory, and I don't know what most of them do..
Examples:

Refresh Cycle Time
Read Delay (tRD)
Read Delay Adjust (tRD Adj)
Command Per Clock (CPC)
Performance Mode

What should they be at?
 
C

Corporate Thug

Lifer
Apr 17, 2003
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ok. when your trying to acheive your max OC, set all the mem timing to the most relaxed settings. also, can your PSU be limiting you?
 
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aggressor

Platinum Member
Oct 10, 1999
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Antec TruPower 430.

And the memory is being used with relaxed timings when testing how high it can go.

Also, I can't use any of the performance modes it seems, the system boots up, but it won't load the OS, it just sits there with right after the PCI Device listing.
 
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orion7144

Diamond Member
Oct 8, 2002
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See here It appears that there are alot of memory issues. I have the IS7 and when I swithced from Genreic PC2700 to OCZ PC3500 EL memory I was able to increase from 225mhz to 275mhz. I think there are alot of bios issues with both boards and should be resolved soon.
 
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aggressor

Platinum Member
Oct 10, 1999
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Just did a little more testing.

200mhz FSB with 1:1 DRAM ratio: good to go with certain settings
250mhz FSB with 5:4 DRAM ratio: fails to load OS with above settings, stops at PCI Device Listing

Wtf? Both of those are running the memory at 200mhz, so what the heck is the problem?
 
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orion7144

Diamond Member
Oct 8, 2002
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If you read the stickied threads in the MB forum or the link I gave you will be able to tell why it is not working. There is problems with the ratios in the current bios.
 
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aggressor

Platinum Member
Oct 10, 1999
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Yuu just linked to the general Abit forum, which is pretty messy.

I've went through the official IC7 thread here as well, and I didn't see anything about it...
 
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orion7144

Diamond Member
Oct 8, 2002
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There is a problem with using "regular memory" with these boards using anything but the 1:1 ratio witch limits OC'ing. Also there are problems with using the othere ratios. Are you using anything like the turbo or performace mode? If so turn it off. There are alot of post on both boards about this. There is also a beta bios out there that seems to fix some of the issues but not all.

Originally posted by: aggressor
Yuu just linked to the general Abit forum, which is pretty messy.

I've went through the official IC7 thread here as well, and I didn't see anything about it...
Click to expand...

 
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oldfart

Lifer
Dec 2, 1999
10,207
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0
The ratios work just fine on the IC7

N/B Strap
800

DRAM ratio
5:4

AGP ratio
fixed 66/33

DDR SDRAM voltage
2.8

AGP voltage
1.55v

DRAM Timing

Manual
CAS 2.5
Act to Precharge 7
RAS to CAS 3
RAS to Pre 3


Perfomance mode
disabled

other mem options
auto

Use this to start. Once you get your CPU speed determined, you can tweak it up fpr faster settings
 
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aggressor

Platinum Member
Oct 10, 1999
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Do you have a link to that BETA Bios? I want to know if I should return this mobo (or ram\sell cpu and get another).

oldfart: I was using those settings before :\
 
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orion7144

Diamond Member
Oct 8, 2002
4,425
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There are a couple of links in my "official thread" for the IS7 on the first message. You can probably find it through those links.

Originally posted by: aggressor
Do you have a link to that BETA Bios? I want to know if I should return this mobo (or ram\sell cpu and get another).

oldfart: I was using those settings before :\
Click to expand...

 
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Tom

Lifer
Oct 9, 1999
13,293
1
76
Originally posted by: aggressor
Just did a little more testing.

200mhz FSB with 1:1 DRAM ratio: good to go with certain settings
250mhz FSB with 5:4 DRAM ratio: fails to load OS with above settings, stops at PCI Device Listing

Wtf? Both of those are running the memory at 200mhz, so what the heck is the problem?
Click to expand...

The memory speed is the same but the cpu to memory interface is faster, maybe. So if your memory was barely fast enough at 200FSB it might not be capable of the extra demand on it.

Just a guess.


 
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aggressor

Platinum Member
Oct 10, 1999
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Alright, I might have been wrong about stability @ 3.0ghz :(

I just crashed (auto-reboot) while I was running Q3 and UT2003 at the same time for 5 minutes. I'm going to try just UT2003 to see if it was instability or just the fact that I was running a D3D and an OpenGL game at the same time :)

Btw is 58~c in BIOS okay for a P4C? I know the Abit reports temps higher than normal, but how high I'm not sure.
 
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aggressor

Platinum Member
Oct 10, 1999
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0
76
I have a dud 2.4c I guess.

I'm not stable @ 3.0ghz at any voltage.

Memory can do 220mhz @ 2-3-2-6, so it's not that.
 
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Toymaker

Member
Jul 9, 2002
192
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I have a 2.4C on a P4C800. It's running 100% stable at 280 FSB at 1.525 Vcore (overvolts to 1.565 vcore). My memory is Corsair PC3500 and running at 5:4(DC DDR 448) 2,3,2,7 1.85 Vdimm. Cas 2 is it. It refuses to work at Cas 2.5. So, don't assume that higher latencies are the answer. For instance: 2,3,2,7 won't work at DC DDR 400. Only 2,3,2,6 or 2,2,2,6 will work in that range. IC7s at least overclock as well or slightly better than P4C800s. So, you should be able to do 280 with good memory and a willing CPU. I think that your memory is just not up to the task. Try each individual stick in single channel to see what happens.
 
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aggressor

Platinum Member
Oct 10, 1999
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76
I think I'm going to be getting the Corsair XMS 3500 sticks.

The Twinmos CH-5 ones are just disappointing, I was erroring out in Memtest 86 @ 215fsb at few different cas latencies. (like 2\3\2\6, 3\3\3\8)
 
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orion7144

Diamond Member
Oct 8, 2002
4,425
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Thats what all of these Canterwood and Sprindale boards are faced with. I don't think the Memory is the problem I just think that we are in the infant stage of the BIOS's. Think about it. You can run 1:1 stable but if you go to 5:4 (lower FSB on the memory) things go waco. There are some serious bios upgrades that need to be done. I think that all 2.4's should hit above 3gig stable. My 2.4 would not touch 3gig until I got good memory yet in theory using the 5:4 ratio with my other memory should have worked since it was below the rated speed of it.

Originally posted by: aggressor
I think I'm going to be getting the Corsair XMS 3500 sticks.

The Twinmos CH-5 ones are just disappointing, I was erroring out in Memtest 86 @ 215fsb at few different cas latencies. (like 2\3\2\6, 3\3\3\8)
Click to expand...

 
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oldfart

Lifer
Dec 2, 1999
10,207
0
0
Originally posted by: orion7144
Thats what all of these Canterwood and Sprindale boards are faced with. I don't think the Memory is the problem I just think that we are in the infant stage of the BIOS's. Think about it. You can run 1:1 stable but if you go to 5:4 (lower FSB on the memory) things go waco. There are some serious bios upgrades that need to be done. I think that all 2.4's should hit above 3gig stable. My 2.4 would not touch 3gig until I got good memory yet in theory using the 5:4 ratio with my other memory should have worked since it was below the rated speed of it.

Originally posted by: aggressor
I think I'm going to be getting the Corsair XMS 3500 sticks.

The Twinmos CH-5 ones are just disappointing, I was erroring out in Memtest 86 @ 215fsb at few different cas latencies. (like 2\3\2\6, 3\3\3\8)
Click to expand...
Click to expand...
A lot of people including myself have no problems what so ever with the 5:4 ratio. Dont assume all 2.4Cs will hit 3.0 stable. There are duds out there. I had 3 of the famed 2.4b SL6EF CPUs. Two were complete duds (140 and 145 FSB), the other, 170 FSB. Same mobo, same memory.
 
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orion7144

Diamond Member
Oct 8, 2002
4,425
0
0
I'm not saying it's not a dud. What I'm trying to say is that there is a problem with the ratios. You may not have a problem with them but have you tried different memory in your board? I have. And serveral PC 2700 sticks don't work. NB strap at 800 and the 5:4 ratio at 200 FSB is PC2700. And 3 of my sticks do not work. I had to get PC3500 for it to work. I even tried the most relaxed timings. This is my second board and it has the same reaction.

Originally posted by: oldfart
Originally posted by: orion7144
Thats what all of these Canterwood and Sprindale boards are faced with. I don't think the Memory is the problem I just think that we are in the infant stage of the BIOS's. Think about it. You can run 1:1 stable but if you go to 5:4 (lower FSB on the memory) things go waco. There are some serious bios upgrades that need to be done. I think that all 2.4's should hit above 3gig stable. My 2.4 would not touch 3gig until I got good memory yet in theory using the 5:4 ratio with my other memory should have worked since it was below the rated speed of it.

Originally posted by: aggressor
I think I'm going to be getting the Corsair XMS 3500 sticks.

The Twinmos CH-5 ones are just disappointing, I was erroring out in Memtest 86 @ 215fsb at few different cas latencies. (like 2\3\2\6, 3\3\3\8)
Click to expand...
Click to expand...
A lot of people including myself have no problems what so ever with the 5:4 ratio. Dont assume all 2.4Cs will hit 3.0 stable. There are duds out there. I had 3 of the famed 2.4b SL6EF CPUs. Two were complete duds (140 and 145 FSB), the other, 170 FSB. Same mobo, same memory.
Click to expand...

 
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oldfart

Lifer
Dec 2, 1999
10,207
0
0
From what I can see reading through the posts, your CPU just may not be able to cut it @ 250 FSB. It happens. Maybe try with one stick of ram as a test??
 
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