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View Full Version : I thought A64 likes low latency?


BIGG_RAY
09-28-2004, 04:39 PM
Why are people using EB and EL ram with such crappy timings? Dont the 64's like 2-2-2 timings? I have some Kingston HyperX (512x2) that will do 240-250 @ 2-2-2....thinking of getting myself a new DFI mobo and a 64...will this ram be enough with that fsb? they only runnin on 3.1 volts...

Section8
09-28-2004, 05:09 PM
Why are people using EB and EL ram with such crappy timings? Dont the 64's like 2-2-2 timings? I have some Kingston HyperX (512x2) that will do 240-250 @ 2-2-2....thinking of getting myself a new DFI mobo and a 64...will this ram be enough with that fsb? they only runnin on 3.1 volts...


Yeah it should work fine. Is your HyperX some old Kingston with BH-5 chips? If it can go like that I assume it is. I would hold on to it for sure. Yes AMD64's love low latency RAM and a command rate of 1T. If you can run a high FSB with tight timings and 1T command rate you will be in bandwidth heaven!!!!!!

thephenom
09-28-2004, 05:16 PM
Most 3700EB can run 2.5-2-2-11 at around 3.1v at 240+, how does that translate to crappy?

BIGG_RAY
09-28-2004, 06:45 PM
ic ic...well lots of people ive seen had been runnin them with 3-3-3 ish timings....but if they can do that...not to bad...still doesnt warrent me to buy some when i have these hyper x's...(yes they are bh5)

blinky
09-28-2004, 06:48 PM
yah one thing i noticed is that even with all the people hitting 310 - 320 on the mem with TCCD, and micron chips, all the top scores on the ORB are ALL with BH5, seems around 270-280 with 2-2-2 1T can pretty much beat anything

Lithan
09-28-2004, 06:58 PM
A64 benefit from LL, but apparently not as much as XP or p4 do. Myself, I don't really worry about timings so much since my testing found that in my real world gaming situations ram timings rarely amount to more than a single FPS. I only tested 2.5-3-3 and 2-2-2 though, so it's possible that 3-4-4 seriously hampers performance.

BIGG_RAY
09-28-2004, 07:21 PM
aight....so maybe if i loosen my timings and try for a higher fsb of like 260-280 on the 64??

BIGG_RAY
09-28-2004, 07:36 PM
or...how high does the vdimm on the new DFI go? cause 3.1vdimm on the infinity = 3.1vdimm...but 3.2 and 3.3 vdimm also = 3.1vdimm on mine...so maybe more volts will help? (plus this stupid mobo loves to undervolt)

lalPOOO
09-28-2004, 08:06 PM
If its bh5 loosening the timings won't really help you, you will need more voltage.

jfr0
09-28-2004, 09:36 PM
my bh-5 did not oc very well on my a64, but I am going to blame the mobo (msi). However EB ran up to 255 at 3325 @2.85v.

Zeus
09-29-2004, 03:18 AM
Guys,

Did it ever occur to you that BH-5 needs to be ran at tight timings?
Loosen timings on BH-5 and bandwidth sux!

Newer generation RAM like EB or OCZ plat.rev2 will give the same bandwidth as BH-5 only with more relaxed timings.

All the better, this new generation mem will make do with less voltage, especially the TCCD chips and will run at even higher frequency's than BH-5.

Haven't tried this new generation mem yet but i will get 512mb of OCZ plat. rev.2 tomorrow, so than i will see wheter BH-5 will still remain bechmarkchamp or not.

drunkenmaster
09-29-2004, 02:25 PM
Newer generation RAM like EB or OCZ plat.rev2 will give the same bandwidth as BH-5 only with more relaxed timings.

Thats completely not true. The ONLY reason EB is good is that by sacrificing cas latency which is least important, but maintaining the other timings you can get higher Mhz, not at all higher bandwidth for same speed.

Simply put micron chips can't ru ncas 2,2,2,5 at any great Mhz, but cas 2.5 or 3 and it ramps up, and on low voltage, something bh-5 can't do. If you have a board that runs fine with a ocz voltage booster, or you wanna voltmod and can give whatever you want really you CAN'T beat bh-5. if you aren't a modder and will only play with stock voltages, 2.9vdimm on a majority of boards, the EB mem WILL go higher than bh-5 and be better. The Rev plat 2 stuff is really pointless unless your on a stuck multiplier and really have no choice but high fsb, it can't do tight timings, so only comes into its own at super high fsb, but even then its still only about as good as EB/bh-5, it all evens out tbh buy the ram that will do the fsb you need for your cpu.

iceman2g
09-29-2004, 02:45 PM
drunkenmaster well put.

Seras
09-29-2004, 04:55 PM
then what ram would to suggest to be used with a dfi lput 250gb and a mobile 3200+ ?
hoping to run 250x10.

PanaBob
09-29-2004, 06:46 PM
then what ram would to suggest to be used with a dfi lput 250gb and a mobile 3200+ ?

I'm running those same settings, DFI LP UT & 3200+ 1MB 10x250 2-2-2 with BH-5. You can get as much vdimm as you like with modded DFI BIOS as long as your PSU can keep up. I can get 3.68v out of my PCP&C but my 3 dimms don't like much more then 255. I have2x256MB of KHX and a 512MB of Corsair3500 (doublesided OCs even less)

BIGG_RAY
09-29-2004, 07:44 PM
ic...im planning on getting that dfi mobo, 64 moble, with a forton/pcp&c/ocz (cant decide) psu...so hopefully with a tweaked bios and this bh-5...i should beable to get up in the fsb?

Seras
09-29-2004, 09:04 PM
hmm, that sounds interesting, i already have the dfi mobo. but wondering what kind of ram to get besides bh-5. any suggestions?

WesM63
09-30-2004, 12:38 AM
EB or Plat Rev2 seems to be the "best" stuff around right now. My 3700EB will do 256mhz stock timings on an unmodded board (2.9vdimm)

Zeus
09-30-2004, 04:18 AM
Newer generation RAM like EB or OCZ plat.rev2 will give the same bandwidth as BH-5 only with more relaxed timings.

Thats completely not true. The ONLY reason EB is good is that by sacrificing cas latency which is least important, but maintaining the other timings you can get higher Mhz, not at all higher bandwidth for same speed.

Simply put micron chips can't ru ncas 2,2,2,5 at any great Mhz, but cas 2.5 or 3 and it ramps up, and on low voltage, something bh-5 can't do. If you have a board that runs fine with a ocz voltage booster, or you wanna voltmod and can give whatever you want really you CAN'T beat bh-5. if you aren't a modder and will only play with stock voltages, 2.9vdimm on a majority of boards, the EB mem WILL go higher than bh-5 and be better. The Rev plat 2 stuff is really pointless unless your on a stuck multiplier and really have no choice but high fsb, it can't do tight timings, so only comes into its own at super high fsb, but even then its still only about as good as EB/bh-5, it all evens out tbh buy the ram that will do the fsb you need for your cpu.

Sorry to disagree with you here but i've seen some Sandra memory bandwidth benches with EB at 250x10 2,5-3-2-5, they were higher than my BH-5 at 250x10 2-2-2-5. (both with 1T)
I also saw some benches with OCZ EL plat rev.2 having 98% efficiency.
That's nothing to kick at, is it?

I never said this next generation mem will outperform BH-5 in benches like SuperPi, PiFast or 3d mark.
I have to see about that myself.
Right now i'm running 2x256 BH-5 and tonite i will have a 512 stick of OCZ EL plat. rev.2 so i can compare.

All i was talking about was bandwidth, not performance.
Run any BH-5 at lousy timings and see what happens in benches or in Sandra.
Question is, does this BH-5 RAM like the tight timings or is it the A64?
I thinks it's the RAM, not the A64.

I'm not 100% sure on this so correct me if i'm wrong. ;)