View Full Version : 266Mhz cpu's worth the extra cash?
I was looking on pricewatch for a 1Gig cpu and noticed that they have two flavors a 1Gig 200Mhz and a 1Gig 266Mhz. I want to know if the 266 is worth the extra cash I haven't seen any reviews putting the two against each other. I know with the right board you can run the 200 at 266. Thanks
SickBoy
03-07-01, 03:09 PM
Not in my opinion....
Even a cheap Duron will run at 133+ MHz FSB on the right mobo (mine has done 140 MHz FSB so far). If you buy a 133/266 chip it'll outperform the 100/200 chip at stock settings, but the 133/266 chip will not have as much FSB overclocking overhead as a 100 MHz chip will. You're going to need a KT133A based board, such as the KK266, KT7A, A7V133 or the K7T Turbo. My choice (being an overclocker) would be the less expensive 100/200 chip with a KT133A board.
SickBoy
sickboy's right. just get the 100mhz fsb model, unlock the multiplier, and drop it. then you can easily raise the fsb to 133 and over. this is what everyone's been doing for a while, with great success.
That is what I thought too but some of the people I work with want me to build them a pc and I don't want to recommend them anything less than the best.
Anyone know the diff between the 1.2 200fsb and the 1.2 266 fsb Tbirds?
From what everyone says the 1.2 is unlocked anyway, is it just that the 266 model defaults to the 133 bus speed?
AKDUDE
AKDUDE (Mar 08, 2001 01:22 a.m.):
Anyone know the diff between the 1.2 200fsb and the 1.2 266 fsb Tbirds?
From what everyone says the 1.2 is unlocked anyway, is it just that the 266 model defaults to the 133 bus speed?
AKDUDE
That's my understanding, and I have not read anywhere that the 266 chips are more capable or even different in any regard.
Yo
Ok, So say someone (ME) has already bought a 1.2 gig 266 bus T-Bird. You are saying that the only real difference between the 200 and the 266 is the price? My 266 will be just as overclockable as 200's right? Just the fsb is defaulted higher. If you do have a fw extra bucks, isn't this a good thing that you are guranteed to get your fsb up that high? Thnaks!
On some boards, you may have a problem with the default multiplier of the chip. Lets say you have a 1gig AMD, with a default of 10x because of the FSB. You unlock it, set to 133mhz FSB and reboot. Now its running at 1330mhz. What if it won't even post at this speed? That could be a problem.
To me, it would be worth 10-20 bucks to have it default at the right multiplier if your looking into the 1- 1.2 gig range chips, that way you could at least boot up, to get into bios.
AKDUDE
BigAir (Mar 08, 2001 05:42 p.m.):
Ok, So say someone (ME) has already bought a 1.2 gig 266 bus T-Bird. You are saying that the only real difference between the 200 and the 266 is the price? My 266 will be just as overclockable as 200's right? Just the fsb is defaulted higher. If you do have a fw extra bucks, isn't this a good thing that you are guranteed to get your fsb up that high? Thnaks!
Yes, the default FSB is higher. No, it will not be near as overclockable as a 200 chip. The 200's will usually do 266 (in DDR terms). When you take a duron for example....you push the FSB from 100 to 133. With a 266 chip (133mhz default) you probly won't see much over 140. Above 142-143 you'll need better memory.....and generate MORE heat. Yes, the FSB is higher......but NO, they are not as overclockable.
chainbolt
03-08-01, 09:57 PM
I have both 1.2 and 1.2 EV266, and they yield and overclock in exactly the same way. On my A7M266 with PC2100 (aircooled)
the EV 6 is maxing out at 10x140=1400 MHz
the EV266 is maxing out at 10.5x135=1417MHz
That is with the voltages for the CPU, the voltage for the clock generator and the voltage for DDR memory, and other bios settings tweaked.
For somebody who is overclocking and can change the multiplier, it does not make sense to buy the EV266. Only for a "normal" user who wouldn't touch the Bios or jumpers, the EV266 makes sense, because the higher FSB is of course also increasing performance of all peripherals.
Aftershock
03-08-01, 10:11 PM
If you buy a 1.2 @ 200.... you SHOULD be able to crank the FSB up to 133, and just lower the multiplier...
both 200 and 266's I hear are IDENTICAL.
If you mobo can support booting in 133 FSB, then it should be fine. The only reason why the CPU would be an issue would be heat right?
BigAir (Mar 08, 2001 05:42 p.m.):
... If you do have a fw extra bucks, isn't this a good thing that you are guranteed to get your fsb up that high? Thnaks!
The CPU is not the limiting factor wrt FSB. In fact the CPU runs at 1200MHz, and multipliers are only used because the FSB is lower than the CPU speed. If it were availble and feasible a 1200MHz CPU would run on a 1x1200MHz bus rather than 12x100 or 9x133.
No there is absolutuely no advantage
Yo
Rocky55
03-08-01, 11:15 PM
hell yeah, they run nicely, i got mine to boot win98se at 150 bus speed, currently i am running 136.
Get the 266fsb,Here is why because the fsb on the mother board and processor are designed to run at 133,your pci bus will remain stock at the 133 fsb setting,This is important if you do not plan on new ram new video card new nic card bla bla bal.I am waiting on my pc150,cas2,512 megs to arrive.In the mean time my pc133 and my 1.2/266fsb on the ABIT KT7A is at 1400 !!10.5 multiplyer and 133fsb.Not to shaby for the first attempt at o/cing.Temps are 25c idle 39c load with the alpha 6035 heat sink. Prime 95 got her to 41c.
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