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Okay - I'm looking at two second hand FX-55s from people on a UK overclocking site's member's market.
They're a similar price, so just consider that to be 'equal'. I'm running a vapochill XEII (slightly less powerful than the LS or the MachII), and I'm really wanting the chip to do 3.2Ghz stable on 1.7v or less.
So - here are the contenders:
Chip 1:
The chip is about 1 month old.
It runs at 2.8Ghz on air, at stock volts (or slightly under, according to CPU-z) in a shuttle. He runs the fans at 50% for noise, and says that it is completely stable whatever he throws at it. However, I asked him to run prime95 and he said that it didn't seem to like it.
Chip 2:
The chip is about 3 months old.
It runs at 3.25Ghz '24/7 stable' or 3.3Ghz 'for benchmarking' on a MachII GT, at 1.8v. I asked him whether he's run prime at all, and he says that he doesn't run prime on AMD 64 chips, as he doesn't consider it a reliable test for them. He can't run the chip at 1/7v and a -30 head temp (which is what my XEII does under load) to test it for me, as the PC is mostly dismantled for selling.
Now, I can be reasonably sure that I can get at least close to 3.2Ghz with chip #2. However, it's been run at 2.8v for 3 months, and I'm quite wary of buying a chip that could soon die due to over-volting.
Chip #1 is a bit more of an unknown. I'm not convinced by how stable it really is at 2.8Ghz on air, but it sounds like he hasn't really pushed it (understandable in a shuttle). I don't really know whether I'll be able to hit 3.2Ghz with this chip in my XEII, as it's hard to find info from people who have run their chips at both stock *and* with phase-change.
Anyone got any info or suggestions?
My other option is to buy a new chip. As usual, this will be a lottery, although I understand that most of the recent chips overclock very well. The thing is, when I buy a new chip it will lose about $200 in value instantly. If I buy one of the second hand chips, I can always sell it again for a similar price if I'm not happy with it.
Thanks
They're a similar price, so just consider that to be 'equal'. I'm running a vapochill XEII (slightly less powerful than the LS or the MachII), and I'm really wanting the chip to do 3.2Ghz stable on 1.7v or less.
So - here are the contenders:
Chip 1:
The chip is about 1 month old.
It runs at 2.8Ghz on air, at stock volts (or slightly under, according to CPU-z) in a shuttle. He runs the fans at 50% for noise, and says that it is completely stable whatever he throws at it. However, I asked him to run prime95 and he said that it didn't seem to like it.
Chip 2:
The chip is about 3 months old.
It runs at 3.25Ghz '24/7 stable' or 3.3Ghz 'for benchmarking' on a MachII GT, at 1.8v. I asked him whether he's run prime at all, and he says that he doesn't run prime on AMD 64 chips, as he doesn't consider it a reliable test for them. He can't run the chip at 1/7v and a -30 head temp (which is what my XEII does under load) to test it for me, as the PC is mostly dismantled for selling.
Now, I can be reasonably sure that I can get at least close to 3.2Ghz with chip #2. However, it's been run at 2.8v for 3 months, and I'm quite wary of buying a chip that could soon die due to over-volting.
Chip #1 is a bit more of an unknown. I'm not convinced by how stable it really is at 2.8Ghz on air, but it sounds like he hasn't really pushed it (understandable in a shuttle). I don't really know whether I'll be able to hit 3.2Ghz with this chip in my XEII, as it's hard to find info from people who have run their chips at both stock *and* with phase-change.
Anyone got any info or suggestions?
My other option is to buy a new chip. As usual, this will be a lottery, although I understand that most of the recent chips overclock very well. The thing is, when I buy a new chip it will lose about $200 in value instantly. If I buy one of the second hand chips, I can always sell it again for a similar price if I'm not happy with it.
Thanks
