P4 overclocking and RAM

Ok... here's what I understand thus far...

2.4c = 12x 200Mhz
2.6c = 13x 200Mhz
2.8c = 14x 200Mhz

I'm planning to use a 2.8c, so if I want a 20% OC, I would need to raise the FSB to 240Mhz (x14) = 3.36Ghz

It's best to keep the RAM synced to the FSB correct? (1:1 as opposed to 5:4 or 3:2) In order to keep the RAM Synced, I would need 480Mhz Ram (2 x 240Mhz)

My question is, for the RAM, could I use PC3200 (400Mhz) with stock timings of 2-3-2-7, and lower the timings to 3-4-4-8, and achieve a (large) 20% RAM OC?

Or could I use PC3700 (466Mhz) and do a small OC up to 480Mhz?

Or would I have to use PC4000 (500Mhz) in order to keep the RAM synced?

Have I got this stuff straight? Any input would be great!
80 answers Last reply
More about overclocking
  1. OCZ PC3700 or OCZ4000.
  2. my comp only uses 3200 ram as below and its up to 3.0

    for optimal performance use pc4000 ram from either Corsair, twinmos, geil or ocz. this will provide a perfect OC.

    <A HREF="http://service.futuremark.com/compare?2k1=6973142" target="_new">3dmark2001</A>

    2.4C @ 3.0G
    Asus P4C800
    Corsair 2x512 3200
    Sapphire 9600pro @ 500/700
    80G Seagate S-ATA150
  3. Which Mobo do you have?
  4. I'll be running on an ASUS P4C800-E.

    I'm not really worried about the brands and such, my questions are more along the lines of OC theory if it could be called that. I'm trying to understand what it is exactly that the OC is doing. Thanks for the replies though.

    <P ID="edit"><FONT SIZE=-1><EM>Edited by corinalbria on 11/12/03 11:24 PM.</EM></FONT></P>
  5. If you're just using air-cool then OCZ's gold PC3700 will serve you well, since most of them could hit 250mhz anyways. If you're using 2.8C then PC4000 is not really necessary, since your CPU will probably start failing before the ram.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  6. scottchen:
    If you're using 2.8C then PC4000 is not really necessary, since your CPU will probably start failing before the ram.


    What about 2.4Cghz or 2.6Cghz? I ordered the 2.8Cghz 800mhz with Geil Dual Ch. PC4000.
  7. 2.4C and 2.6C has more headroom for FSB overclock since they use lower multiplier. While 2.8C uses 14x multiplier, and CPU has a limit of how far it'll go so without a decent heasink with loud fan or watercool, you'll have to run your ram under-clocked, because your CPU probably won't accept 250FSB without 1.7V and at 1.7V the cpu runs fairly hot.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  8. hey scottchen, hopefully this will help the cause:
    At what FSB setting did you have to raise your CPU vcore to continue overclocking? What's it currently set at? Also, I got that Geil Platinum PC4000 also and it's SPD setting says it's 2.5-7-4-4 but in CPUZ says it's 2.5-4-4-7. So would relaxing the timings to 3-4-4-8 be useful? or should I keep it at it's default?

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  9. TwoFruitz - Is your Ram running Synchronous or Asynchronous?
  10. Scottchen - I've read elsewhere that PC3500, 3700, 4000 RAM is all basically the same as PC3200 RAM, but with looser timings. Is that true?

    If that's the case, would relaxing the timings on PC3200 to 3-4-4-8 (seems standard for PC3700 and 4000) allow an overclock to 480Mhz?
  11. quote: Relaxing the timing would be very useful if you're going past its rated DDR500 mark.

    PC3200 is rated at DDR400 right? and I'm asking whether the looser timings would allow that to go to DDR480.

    Thanks again for replies
  12. thanks guys. Ok, CPUZ said 2.5-4-4-7 and my DDR sticker said 2.5-7-4-4. The 2.5-4-4-7 seems correct when compared to 3-4-4-8, so which is right? I've never seen the second # be the highest. Is is just out of order but representing the same thing? Like a "tomate-o/tomaht-o" thing? Is the Geil more aggressively clocked at stock speeds than the OCZ? I know this isn't my thread, but I figured since I have the same equipment, any questions help the cause.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  13. Found an interesting link on memory timings and such. Any thoughts?

    <A HREF="http://www.pcstats.com/articleview.cfm?articleid=873&page=1" target="_new">http://www.pcstats.com/articleview.cfm?articleid=873&page=1</A>
  14. I'm hoping to use PC 3200 since it's alot cheaper, which is why I ask. At this point though I think I'd be willing to put a little more down for PC 3700 since that seems like I'll have a better chance at a 20% OC on the CPU
  15. First of all Corinalbria, PC3200 and 4000 or 4200 are NOT the same thing, PC3200 uses 5.0ns memory(or was it 4.5 can't remember) and PC4000 uses 3.5ns memory. Sure the higher rated ones are rated to run at higher latency, but if you pump enough voltage through it it'll run at low latency. PC3200 would generally overclock from default 200 to 216(PC3500) and some PC3500 can reach 233(PC3700), occasionally PC3700 can reach 250(PC4000), right now Geil's PC4000 and PC4200 are the EXACT same chips, except PC4200 runs at higher latencies, and comes with different stickers. OCZ had done something amazing, their PC4000 copper runs at 250mhz 3-4-4-8, their new PC4200 copper runs at 266mhz 2.5-4-4-8. At 2.8Vdimm of course. So that's a little brief description on memories.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  16. I set my CPU to 1.95 vcore for 10 min, it was running at over 4G on AIRCOOL! If you relax your timings to 3-4-4-8 that'll get you probably up to 270mhz on the memory at least that's what Anandtech said. Pump vdimm to max allowed, i think Geil supports up to 2.95

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  17. also wherever you read the PC3200 and up are all the same thing, give me a link to the site, i'll tell my friend to hack it and put some porn on it.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  18. remember the most important principal Frequency>Timings by a LOT.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  19. In theory, if PC4000 uses 3.5ns memory, shouldn't it be able to hit 285 or 286MHz (reference equation: 1000/#ns=MHz)? If OCZ can pull off that 266@2.5-4-4-8, I can't imagine they are that far from making PC4500 or 283MHz (which, according to my calculations, PC4000 should be able to reach anyway). A 2.4 would run at 3.394GHz at that speed and a 2.6 would at 3.679GHz (not without expensive cooling of course)!!! Imagine how fast those processors are (heck, your 2.6 is damn close to that, so you would probably know :cool: ). 9.0GB/s would be possible, too, something only the SiS659 RDRAM chipset can do.

    Damn Rambus.
  20. I mean, somebody did get their OCZ PC4000 gold up to 296mhz stable, but that required 3.3Vdimm, and of course 3-4-4-8 timing. I just got myself a job at a local computer store, pays 10 canadian an hour, great deal and it's REALLY easy, just sit in the back occasionally fix a few computer other times just see who makes up the best insult. When i got enough money i'll definently get the OCZ PC4200 gold when it comes, i asked OCZ about it they said they're aiming for 2.0-4-4-7 on the PC4200 gold, however at 2.8-2.9 vdimm. So they're not sure how many motherboard actually supports 2.9 vdimm which could cause a problem.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  21. Geil's doing a pretty decent job in the high-end memory market, i wander when Corsair or Kingston or even Mushkin's going to make something insane, that's going to make us go oooh and ahhh. Because OCZ seems to be the only one that's doing any work lately.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  22. Their working on PC5000.
  23. If they make PC5000 at 2-2-2-6 even if it's 500 US i'll buy it, under 1 condition, as long as it's under 3.0 vdimm.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  24. man, a lot of posts since last time. Corinalbria, thanks for that website. The timings always confused me. And thanks everyone else for the added info! Hey scottchen, at what point did you have to up the vcore voltage on your CPU? At stock voltage, I could only make it to 245 FSB stable. I'm upping the voltages tonight and lets see what happens...


    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  25. you using 2.6C or 2.4C?

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  26. Sucks to be that 2500+, too bad my 2.6 never saw 13x200 first thing it saw was 13x250.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  27. yo, as usual, need a little help on this end!

    Abit IC7-G
    P4 2.6c
    Geil Platinum PC 4000 @ 2.5-4-4-7 (stock timings)

    At 1:1, even up at 1.65 vcore and 2.8 vdimm I could not get past 248 FSB! That is...unless I relaxed the timings to 3-4-4-8 and changed the ratio to 5:4. Then it would go further, but that's not what I paid for. So this is a RAM issue, right? If I relax the RAM, I can overclock further, BUT I didn't even get to 250 FSB @ 1:1 stable. It would get into windows and as soon as any benchmark was performed it reset. It didn't matter what voltage vcore was. Nothing changed untill I relaxed the RAM. Should I exhange it for new stuff? Based on what I've learned, it seems my CPU can handle more but my RAM says "no" and since I couldn't get to 250 FSB @ 1:1, I have a valid excuse, right? When my computer was unstable, upon booting, it would freeze during the memory test. Oh, and I'm actually using stock cooling @ 3.2 Ghz and my load temp is only 51 degrees C. It idles around 40 degrees. Both Winbond and MBM 5 agree with each other. I'm usually around 43 degrees in BIOS.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol: <P ID="edit"><FONT SIZE=-1><EM>Edited by krazynutz on 11/14/03 09:31 AM.</EM></FONT></P>
  28. Get Vcore up to 1.7, i think the reason you can't get 250FSB is because the Geil memory loves voltage, their warrenty covers up to 2.95v It could be your cooling, because the 2.6C stock isn't meant to handle anymore than 2.8G, so you could try picking up a better heatsink. Also you flashed your mobo's bios to the newest one right? Abit's known with issues for unable to overclock 1:1.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  29. yeah, but isn't 1.7 BAD for a CPU? I mean, would it make that big a difference between 1.65 and 1.7? Also, for an overclocking legend they're supposed to be, it seems wierd that Abit, of all companies, has a problem with a 1:1 overclock. That aside, the stock fan seems to cool it easily enough, I mean at 3.2 @ load, I'm only running 51 degrees. (case temp never gets above 29) Both MBM 5 and winbond hardware monitor both agree. I'm ordering the MCX4000 Rev. 2 heatsink (on sale for $35 at <A HREF="http://www.sidewindercomputers.com" target="_new">http://www.sidewindercomputers.com</A> ) and using a Sanyo Denki 92 mm with it. In my other post I say that my fan dies when overclocked. @ stock, it's fine, but once I go over 3.0, my CPU fan just quits unexpectedly after about 10 min but starts right back up if I reboot. I'm gonna run a few different tests to see if it's the fan or the mobo.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  30. So did you date the bios?

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  31. So did you update the bios?

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  32. sorry, thought I said it earlier. yeah, have the current bios v18.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  33. already using Arctic Silver Ceramique. Again, I don't think it's a temp problem because the CPU never goes above 51 degrees. All I was going to do was switch my CPU fan and case fan 3-pin plugs on my mobo. That way, I can see if it's the fan that's failing, or that the mobo's up to no good...

    If the case fan (plugged into CPU fan jack) stops, then I know it's the mobo. If the CPU fan (plugged into case fan jack) stops then I'll know it's the fan.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  34. hmm...well, I should have the new HS mid next week so we'll see what's up then. Thanks guys. I'll let ya know how everything turns out.

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  35. You getting the Swiftech 4000? or the Thermalright 947?

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  36. Fellas, can i ask a question here also. I couldnt get my ram to pass mem. test, sent it back (might remember me scottchen). Kingstone sent me a matching pair of 512 hyper 3500. Still wont pass a rated timings(2337) but will pass at (3448). For some reason my board dont like it(kingston).This is no matter what my vdimm is.Thinking bout getting new memory, got same board as Scott(Asus P4P800 dlx).Every one is saying OCZ 4000 gold. Is this the one i should get, on there web site it says its designed for the 865,875 chipset.Really wanna get something that works right, dont oc. a lot but want a little if theres others thats better let me know, i know Scott uses this and seems to be working fine with that board.Thanks for your time and Scott thanks for previous times. I really have learned a lot listening to you fellows on the forum. P4C 2.6, P4P800 dlx., 2-512 3500 hyper, os 2000--PS--if i change memory would 2-256 mem. be enought

    The man of steel said that
  37. getting the MCX4000 Rev. 2 and slapping a Sanyo Denki 92mm fan on it. Pushes 56 CFM and it's pretty quiet. Ok, testing with the motherboard and CPU fan are thus:

    I switched my power supply fan with the CPU fan on my mobo (since it was the easiest) and low and behold, my PSU fan is going crazy now. It hasn't stopped, but in both MBM 5 and Winbond Hardware Doctor, it's rated anywhere between 0 RPM and 84000 RPM (that's not a typo). So something's up with the board or my PSU. On top of that, I'm getting wierd spikes in my vcore and vdimm in Winbond. Don't know if it's a glitch or what, but my vcore goes anywhere from .49v to 2.77v and my vdimm drops to 1.9 every so often. Ok...as I was typing this, my case and PSU temp sensors just disappeared in both monitoring programs. So I've got wackiness all around. Is this typical overclocking wierdness or do I have faulty equipment somewhere? Mobo? PSU? RAM?

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol: <P ID="edit"><FONT SIZE=-1><EM>Edited by krazynutz on 11/15/03 01:38 AM.</EM></FONT></P>
  38. Holy Mary Mother of GOD! Ok, first thing tomorrow I'm heading out and buying a new PSU. I can't even get to 3.0 Ghz now stable. My voltages and fans are going crazy. I had MBM 5 and Winbond both set up for fan failure/shutdown and guess what? it works! I am now back in Windows at stock everything. Any thoughts? Think it's my power supply dying on me? I was just about to say that everything seems fine at stock speeds but wait! my fans are acting up here too!! Aggghhh!!

    :lol: <font color=blue> "You ain't leading but two things right now: Jack and sh!t, and
    Jack left town." </font color=blue> :lol:
  39. I don't recommend the OCZ PC4000 gold if you're using P4P800 and not planning to do the Vdimm mod, because OCZ PC4000 gold is covered up to 3.0 vdimm, you can not take advantage of that, so if i were you i'd just save a coupld bucks and get copper version, it covers up to 2.9, but our mobo only reaches 2.85 anyways. If you get the PC4000 copper i got mine up to 266(PC4200) at 2.5-4-4-8 2.85 vdimm of course. Then 275mhz at 3-4-4-8 at 2.85vdimm. I can't wait 'til system memories are using DDR2 memory. I can't wait to see what frequency those things can achieve.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  40. PSU's dying, don't take the risk good choice buy a new quality 1 right away, Enermax, Fortron, Antec, Raidmax whatever, something nice ignore generic. The couple bucks saved is not worth putting your system at risk.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  41. can i get to 250 fsb easy with 4000 copper.If i lap my stock cooler how much do you think i could drop temp., gonna get better cooler but not right now, wife getting mad at me---ha ha

    The man of steel said that
  42. Cant understand why Kingston wouldnt do the job, i got Kingston non hyper x in my A7N8X(333)and it shoots to 3200+ speeds no problem,o well guess its time to buy OCZ again.Thanks for the tip on copper(i was thinkin you had gold), guess i could just get the 4200 hummm a thought.Congrates on the job at the computor store maybe they will let you buy at cost ha ha.

    The man of steel said that
  43. my ram is sync. im buying OCZ duel 4000 to get a FSB of 1200

    <A HREF="http://service.futuremark.com/compare?2k1=6973142" target="_new">3dmark2001</A>

    2.4C @ 3.0G
    Asus P4C800
    Corsair 2x512 3200
    Sapphire 9600pro @ 500/700
    80G Seagate S-ATA150
  44. Ya i think thats what ill get also. I just want something i wont have problems with.I am playing with some Kingston now and have had all kind of trouble with it.Sent it back once so cant hardly do it again.

    The man of steel said that
  45. DDR2 STINKS!!!
  46. Just what he needs. Buying his stuff at cost.
  47. ha ha ya, your right, but,he still could not afford it as hes like all of us here---he would want it all, and all changes weekly--ha ha.Always something newer and better out there

    The man of steel said that
  48. This little store overprices sooo much so i get 35% discount even after that they still make about 5% on the item.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
  49. Comeon boss i know DDR2's hot and has higher latencies, but imagine the frequencies those things'll do.

    -Intel PIV 2.6C @ 3.575G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800np @ 432/760 -SB audigy -120G Maxtor Diamond Plus9 S-ATA150 hdd -450 Enermax PSU
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