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The best ram for an a64. Hows cas 2.5 pc4000?

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Overclocker550

Overclocker550

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Joined
Feb 5, 2002
AIB - - 512MB (256MB X 2) Kit DUAL CHANNEL PC4000 500Mhz DDR CAS 2.5
Details:
-PC4000 512MB DDR500 Memory Platinum CL2.5
Part - 256X2DDR500
Updated - 4/2, 5:52 PM


they want $83 for this. I am not getting the ram now, but in the future when I go a64, I could sure use that. ddr500 at CL2.5 doesnt sound too bad, especially for that price and if I get socket 939 ill get dual channel! I know im not going a64 now, but id like to keep my options open and know what ram to get WHEN I go a64, it is up to me to decide when. I checked the prices of pc3700 and its the same price or more and its also CL2.5! bh5 is out of the question since you need mad volts which I am not gonna mod cause the ondie memory controller hates high volts. also bh5 is too expensive and its CL2 which isnt much faster than 2.5 but I get ddr500 speeds with pc4000 ram without the trouble of modding! any comments?
 
Good idea but I wouldn't under any circumstances buy from AIB. Instead I'd try to pick up some KVR 3200 with hynix bt-d43 chips. A 2*256 pack will run ya bout 80 bucks after rebate from best buy or circuit city. I have some running on a dfi lanparty b 255 2.5-3-3-3-11 @ 2.8v. It can prolly go a bit higher than this but my board hits a brick wall @ 260.

case in point http://www.resellerratings.com/seller2870.html
edit: oh yeah thats in dual channel too
 
Generic memory with Samsung or Hynix chips. There are better prices and better products out there. One should pay less attention to advertised tCL ratings, and more to questioning what chips and what tRCD/tRP timings are set at.
 
wow you got pc3200 ram to 255fsb at 2.5-3-3-11 at 2.8v that has to be a record, mine only does 220fsb!!!!!!!!
 
yes but his ram is pc3200, if it could do so high, it would have been speed binned as pc4000!
 
yup the Hynix chips though your referring to speed mechanic are actually rated ddr500, the d5 at the end of em is how hynix labels it as ddr 500. The d43 chips are rated as pc 3500 I believe, but companies like kingston and corsair use them for everything from pc 2700 to pc 4000. you can read more @ xbit labs http://www.xbitlabs.com/articles/memory/display/ddr500.html

edit: Oc550 theres just not that much demand for pc 4000 so when the choice is not sell it or sell it as pc 3200 they choose to sell it. Same reason we can oc tbredb 1700's to 2.5 ghz.
 
so why pay more $$$$$$ when I can just save on pc2700 and overclock it to 250fsb? is that ram aimed for those with no clue on overclocking?
 
snvpa said:
yup the Hynix chips though your referring to speed mechanic are actually rated ddr500, the d5 at the end of em is how hynix labels it as ddr 500. The d43 chips are rated as pc 3500 I believe, but companies like kingston and corsair use them for everything from pc 2700 to pc 4000. you can read more @ xbit labs http://www.xbitlabs.com/articles/memory/display/ddr500.html
Click to expand...

Hynix D43 chips are rated for 200MHz w/ 3-3-3 timings
Hynix D4 chips are rated for 200MHz w/ 3-4-4 timings
Hynix D5 chips are rated for 250MHz w/ 3-4-4 timings

Most DDR-500/DDR-533 still use Hynix D43 chips, though as time goes on more likely will be replacing D43 chips with D5 chips, simply because it's newer. Right now there isn't too much of a differance in clock speeds found on binned D43 and good D5 chips.
 
Well for one I have never found it on pc 2700 but a couple of peeps on the forums have. number 2 and most improtand is that far less than 10% of the worlds computer users overclock their machine. Then lots of those don't know what to look for or order ram online where there is no guarentee of what you'll get. It takes some searching to find KVR with these chips.

edit: good info speed mechanic, I forgot about that.
 
what timings should I go for anyway? 2.5-3-3-7? someone used 2.5-4-4-7 and his performance sucks, so forget that after all.
 
You would want to sustain a tRCD (usually the second timing - coming after tCL) of 3 if you can, ideally you would want a tRCD set to 2 but most newer memory cannot handle this at any speed above 200MHz. There will be a mute differance in performance between 2.5-3-3 and 3-3-3.
 
my pc3200 ram will do 220fsb at 2-2-3 how good is this? is 240fsb at 2.5-3-3 still better?
 
more than likely running at a higher fsb speed will negate any perfromance loss from dropping slightly on a couple of timings.
 
I dont want to compromise, I want the best of both worlds, but theres no ram thatll do past 220fsb at 2-2-2 timings, so this is why I asked. how many fsb is 2-2-2 to 2.5-3-3 worth? 20fsb?
 
I personally say go with timings all the way. What I suggest is getting your timings as low as possible at say 200mhzFSB. Burn it in, how up your FSB a little up your VDim a little, and burn in again. Just keep repeating this. You will notice that some people have say 240-275FSB with 222211 timings. You can not just jump your FSB clear up there and no extra Vdim. Just take your time with it and it may take a couple of bios resets but that is what makes this a hobby.

My PC seems to be running faster at a lower FSB, it may be a fluke but we will see. I have got my highest PCMark04 score of 4572 with 216fsb and 22225.
 
this is ch5 ram and will do up to 220fsb at 2-2-3 timings. I hear a64s dont really care if the "2" is a 2.5 but those 3's must become 2's but I was thinking it would be much cheaper to get pc3700 ram and do 250fsb at 2.5-3-3-7 and get the same performance as bh5 ram at 2-2-2-5 at 230fsb
 
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