Submission Details
I.nfraR.ed`s Reference Frequency score - Extreme League
176.76 MHz with Abit KT7A at 176.8MHz
Ranking position
n/a
Global rank:
1st
KT7A rank:
1st out of 5
Points earned for overclocker league
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Global Points
Not I.nfraR.ed's best submission
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Hardware Points
1st using KT7A
6.0 Points
Points earned for team league
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Global Team Power Points (GTPP) Not XTREME OC Team Bulgaria 's best submission
0.0 Points
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Hardware Team Power Points (HTPP) 1st in team using KT7A
5.9 Points
Hardware details
CPU details
- Model: AMD Athlon XP-M 2500+ (Barton) 'Barton'
- Cooling: Air (Custom)
- Cores: 1,866MHz(Stock)
VGA details
- Model: GeForce4 MX 4000 64-bit (NV18) NVIDIA
- Speed: 250MHz / 200MHz (Stock)
Mainboard details
- Manufacturer: Abit
- Model: KT7A
- Cooling: Air (Custom)
- Chipset: KT133A (VT8363A)
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Recent Comments
says:
Very nice ! Is that limit of the chipset? In other words: what possibly limited you?
I.nfraR.ed says:
Yes, chipset limit. No difference between 3-3-3 and 2-2-2. Or possibly some of the buses/controllers, since nothing is locked.
You can see I've benched maxmem with tight timings at almost the same freq.
says:
You can play around with TEC on NB or even better cooling. I had once ABIT KT7 or KT7a but was not working, blowen caps and something else, gone to gold-diggers... If you are interested in this I had once also a good-looking KT133 (a?) motherboard DFI AK74 (the name lol). It was back in the non-OC days so I don't remember exacly if had good clockgen. Maybe some SOLTEKs would beat this score. Keep pushing
EDIT
Hmm seems like that DFI AK74 has ICS 94215 and max 133 FSB, but I am not 100'% shure.
I.nfraR.ed says:
I tried chiller on NB - did not help at all. Volts helped a little.
This is with 4.4V I/O.
Maybe it's the mem controller, but there's no lower divider - only 1:1 and FSB + 33MHz. Second one not available at high FSB though.
Theoretical maximum for this board is 183MHz.
This was the first time I play with KT133(A).
GraduS says:
4.4v its 3.3v line from PSU? What PSU is it?
I.nfraR.ed says:
I/O source is from 5V line (stock board allows up to 3.9V from bios), so I did a simple FB mod.
My 3.3V-modded PSU is Fortron 400 PNF and can go higher than 4V, but for this sub I used Seasonic 1000W Platinum.
says:
How do you know the theoretical limits? Is it determined by clock generator or what?
This is nice idea. Yesterday i was OCing old ABIT KG7 and there was I/O voltage settings in BIOS. Rising it a bit was giving me a better scores. (Nothing new )
And just to confirm this i can say that the same happening on Pentium 3 platform. Rising I/O is good, so good idea with this.
I am still wondering what is all about this FSB+33 MHz "divider". On a number of motherboards I have seen the same option but was called "FSB+PCI". So if you start with 100MHz fsb +33 mem its 133 mem. But what if you do eg. 120 FSB?? Is it 153 or is it 120*1.3333(3)=160
I.nfraR.ed says:
Yes, it is FSB + PCI. With that "divider" it reaches roughly the same RAM frequency, but on lower FSB.
I have some Qimondas laying around and can try if it could go higher, but I think chipset/pci/agp is not able to go higher.
First thing I tried was to use the modded PSU with higher 3.3V line, but it did not help.
With the FSB + PCI option I could only boot at about 122MHz FSB and it stops at about 133 within windows.
Which is the same SDRAM freq I could reach with 1:1, ~133*1.33
Of course performance at 1:1 is better on these platforms.
At 133MHz FSB PCI/AGP should reset back to normal, but the "extra 33MHz" options is only available up to 122 in bios, then disappears.
Also bios has frequency addition (up to +28). Maximum you can set is 155 + 28 = 183MHz.
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