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AMD Athlon 2500+ 'Barton' Problems...
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Posted by: Maverick
I just recently bought the AMD Athlon 2500+ "Barton" Processor (link) off of newegg, with a couple of other parts. Actually a whole lot of parts. Anyhow, I put teh computer together yesterday, and am sitting in front of it right now. Anyways, the processor which I bought was susposed to be 1.83ghz, however, it only reads as 1.1ghz. Even on startup. Whats going on?
Posted by: taco_fox
Change the bus speed from 100mhz to 166mhz
Posted by: ZeRo_MaXwInG
You have to enter the BIOS to change the FSB to 166Mhz (which doubled will get you a true FSB of 333Mhz).
Posted by: arturo238
Make sure that your memory speed is set correctly. If you are using an Asus board in your system then it will default to the lowest settings and you need to crank them up to the actual settings. Though I should warn you since everyone else got to the proc.
Posted by: Maverick
Ive never really played around in the BIOS before. Just to make sure, I will be doing everything correctly, what exactly am I looking for? Just want to make sure I have the right thing =)
Posted by: Maverick
Ah, nevermind. I set it to 166, and now my processor reads at 1.83ghz (as it should), and all is well. However, arturo was mentioning something about low memory settings. It reads 512 megs. But how do I make sure that im getting full through-put of my PC3200 DDR RAM? Thanks!
Posted by: nocode
PC3200 DDR is designed for use in systems and motherboards which require a 200MHz front-side bus, with an effective front-side bus speed of 400MHz.
What motherboard do you have? You will not get the full benefits of PC3200 unless your motherboard supports a 400MHz front side bus speed. You should see that setting in your bios in the same area where your were able to change your cpu setting.
Posted by: Ocean
can you use a 400mhz bus for the 3200 ram, and keep the chip running at the 333 Mhz bus speed? or basically, is it possible to isolate those 2 different bus speeds from each other in the bios or by modifying the chip clock multiplyer to something lower? 5/6?
Posted by: redwench
why would you want to?
the overall performance will be limited by the lesser of the two.
Posted by: Ocean
oh i though there were bartons that would only run at 333Mhz i didnt know they all would run at 400Mhz.
cause i was gonna buy this chip:
Barton 333
and put it in a nice mobo that had potential for future upgrade with a 400 Mhz bus.
now im left with a ram choice: 3200 or 2700,
at first i thought i shouldnt need to go any faster than 2700 because the mem bus had to match the cpu bus. and i was wondering if you can use the potential of 3200 ram @ 400Mhz while the chip runs with its (required?) 333Mhz bus. cause i dont want to spend the extra $80 on just a faster chip.
Basically, can i run a slower cpu, with out having to slow down the entire system or ram? i thought this was saying that you can, by saying theres another seperate ram bus speed option:
 Quote:
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You will not get the full benefits of PC3200 unless your motherboard supports a 400MHz front side bus speed. You should see that setting in your bios in the same area where your were able to change your cpu setting.
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even though the chip was running at its correct fsb of 333
i guess i am asking can improve the performance of a 333 chip on a 400 mobo by using 3200 instead of 2700? (underclocking the chips bus compared to the rest of the mobo or ram)
i knew it wouldnt be as great as a 400 chip on a 400 mobo with 3200 ram, just that it was significatly cheaper, than the 400 chip upgrade from 333.
Posted by: Null Actor
There are 333mhz FSB versions of the Barton chip, and yes, you can run ram asynchronously.
However, I doubt you'll see much, if any, performance improvement from faster ram. Especially if you use a dual channel chipset like the nforce.
Posted by: redwench
yes, you can run them seperately. but if you have a motherboard that supports 400, and 3200 ram, why on earth would you buy a 333 cpu? or underclock a 400? i mean, a professional formula one driver could get on the autobahn in his ferrari and drive 70kph. but it would be a bit silly under all but the oddest circumstances.
Posted by: Null Actor
Maybe because the only 400mhz FSB athlon is over 400$USD right now? Or maybe you don't feel like buying new ram?
Posted by: Ocean
exactly, i can get a nice 400 mobo for 100$ and im not sure i need to spend an extra two-hundred or so dollars on just a chip. and me copping out an extra 120$ now for a gig of quality pc 3200 would make more since if ill be able to use it now and after a potential upgrade, when it will be cheaper.
im kinda new to hardware terminology. i didnt mean to communicate an intent of underclocking the chip. i was trying to communicate the (relative to the system) underclocking of the bus that the chip is dependant on. i dont have enough precision in the vocabulary to know whether that should be called the chip's bus(wrong now i know), or the fsb, or something else. i dont know where the busses end and the chip structure begins, or even if there is a bus on the chip.
now that i know you can set different speeds for chip and ram, is this feature pretty much common across all the mainstream bios or motherboards in this class?
Posted by: redwench
you dont set anything except the fsb in the bios. ram only has one speed, full.
Posted by: Null Actor
Quote:
Originally posted by redwench
you dont set anything except the multiplier in the bios. ram only has one speed, full.
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Wrong, the multiplier is the only thing you CAN'T set.
Most motherboards will let you set the ram speed as a percentage of the FSB. For instance, I'm currently running my ram at 80% of my FSB so that I can run 266mhz ddr with a 333mhz FSB. As far as I know, it's a common feature to NForce boards, which is what you'd want. Don't buy a VIA board.
Posted by: taco_fox
Most nForce2 boards allow you to change multipliers on Tbreds and Bartons.
Posted by: Null Actor
Oh, my bad. Used to be that if they weren't unlocked, you couldn't. I haven't exactly paid attention on that front.
Posted by: ZeRo_MaXwInG
It is also more beneficial to set the FSB for both RAM and chip to the same speed (sychronous). Having both CPU and RAM running at 333Mhz is more beneficial than running CPU @ 333MHz FSB and RAM @ 400Mhz (asychronous). Just a little side info for future reference.
Posted by: paulo500
I think Maverick and i are running the exact same pc!
Anyway, now that i have the cpu running at 1.83ghz on the Asus A7N8X-deluxe, i am curious to see if my 512-pc3200 ram is utilizing the power that it is designed for. Is the default setting on the asus boards set to max, or do i have to tweak something to match my AMD 2500+333fsb chip??? (i went with the 2500+ because i saved about 400$cdn)
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