Abit is 7 and 2.4C, but what ram?! [abit is7] [4c]
Q: My brother is planning a new setup soon
He wants to go with the Abit is 7 and 2.4C
What ram must go if he wants some overclocking (brand / speed do)?
Thanks
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Re:512 MB of PalmtreePC PC3200
Nice overclock you got there, no doubt. Never heard of that ram. What kind of timings can you run @ DDR468??
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Re:Originally posted by: guy
You have to do the math. Lets say you get an "average – good" overclock of 3.3 GHz.
12 x 275 FSB = 3.3 GHz
1:1 ratio = DDR550
5:4 = DDR440
3:2 = DDR366
DDR550 is difficult and very expensive to do. You also would have to run some extremely slow memory timings which negates any performance increase you would gain by running 1:1. DDR440 is more reasonable with good ram, DDR366 can be done with anything.
I like a 2.6 better because it lowers those numbers
13 x 254 = 3.3 GHz
1:1 = DDR508
5:4 = DDR406
3:2 = DDR338
2.6 with a 5:4 ratio is a nice setup since you can use commonly available ram that doesn't cost a fortune, and run tight timings since the speed is not too high. The high end ram being sold as PC3700, 4000, etc has to run miserable timings such as 3-8-4-4 to get the DDR speed. Hardly what I would call "high performance".
bah! i like the extra bandwidth of running 5:4 with 234 mhz 
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Re:Thanks guy for all the info
I think I'll tell him to get some DDR433 with some nice timing, maybe Corsair XMS or KINGSTON
and try to overclock to 12 x 275 FSB = 3.3 GHz and 5:4 = DDR440
I think he be fully happy with this system
he upgradeing from a P2 266 notebook
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Re:You have to do the math. Lets say you get an "average – good" overclock of 3.3 GHz.
12 x 275 FSB = 3.3 GHz
1:1 ratio = DDR550
5:4 = DDR440
3:2 = DDR366
DDR550 is difficult and very expensive to do. You also would have to run some extremely slow memory timings which negates any performance increase you would gain by running 1:1. DDR440 is more reasonable with good ram, DDR366 can be done with anything.
I like a 2.6 better because it lowers those numbers
13 x 254 = 3.3 GHz
1:1 = DDR508
5:4 = DDR406
3:2 = DDR338
2.6 with a 5:4 ratio is a nice setup since you can use commonly available ram that doesn't cost a fortune, and run tight timings since the speed is not too high. The high end ram being sold as PC3700, 4000, etc has to run miserable timings such as 3-8-4-4 to get the DDR speed. Hardly what I would call "high performance".
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Re:Originally posted by: guy
I have a IS7, and 2.4c, and 1×512mb stick of Corsair XMS PC3500. here are my results (http://www.gotgib.com/phpBB2/viewtopic.php?t=250) with it.
I'm please, but I would be getting much larger numbers on the memory benchmark had I bought another stick of memory to stick in it to run dual channel.
So…depending on how much ram you want (or want to spend on) 2×256mb would be good enough for most everything but some people swear by 2×512mb.
Make sure its dual channel, make sure it is at least PC3200 (DDR400). I run my stick right at spec of DDR433 (270FSB x 12 =3243Mhz)
Stay away from cheap OCZ. Some people like Kingston's HyperX series of PC3500. BestBuy it for $100 after rebate this week for one stick of 512. Might want to try that…see some results, and return it if unhappy.
By all means do get the OCZ you will not regret it. THey have great customer support. I have OCZ running in all of my rigs now.
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Re:I like my Corsair XMS RAM, Kingston HyperX is also supposed to be good. I plan on putting Geil RAM in my bros system.
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Re:I have a IS7, and 2.4c, and 1×512mb stick of Corsair XMS PC3500. here are my results (http://www.gotgib.com/phpBB2/viewtopic.php?t=250) with it.
I'm please, but I would be getting much larger numbers on the memory benchmark had I bought another stick of memory to stick in it to run dual channel.
So…depending on how much ram you want (or want to spend on) 2×256mb would be good enough for most everything but some people swear by 2×512mb.
Make sure its dual channel, make sure it is at least PC3200 (DDR400). I run my stick right at spec of DDR433 (270FSB x 12 =3243Mhz)
Stay away from cheap OCZ. Some people like Kingston's HyperX series of PC3500. BestBuy it for $100 after rebate this week for one stick of 512. Might want to try that…see some results, and return it if unhappy.
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