OCZ VX, Best Memory made since BH5!!

[Tony]

Posted these elsewhere but guys are asking "will these do 270 2-2-2 3D", "Why don't these scale much past 260 2-2-2 like BH did", "what's the fuss bout, these are no better than BH"....

OPP, hope ya dont mind me posting a few screenies here to answer those questions

My highest screeny with ~3.35vDimm 1x512 VX
My highest SuperPI 32MB with ~3.35vDimm 2x512mb VX
My highest 3Dmark01 with ~3.35v 1x512mb VX

I have a feeling all our VX modules will run a fair bit higher once AMD release CPUs with better memory controllers too

I have a feeling you are correct m8, a LOT has to do with the memory controller

[DoGMaN]

I gotta get me some :o that is just too sweet!

[NapalmV5]

The problem these days is if you don't use 1gig and only have 512Mb like BH-5 in most cases, you lose out on performance. The 1gig gives you 2-way interleave, 2 gigs will give you 4-way interleave. This is on S939 motherboards anyway.
So haveing 1 gig or higher is in if you can use aggressive timings,, so now you have VX

OPP

So 4-way interleave doesn't work on 512/1024 MB ?

Man, there's always something new about A64/Mobos.

[NoX]

Did you guys at OCZ perform some testing on Intel platforms? I can't find anybody with a P4 who tried this mem and I don't understand why. Did I miss something?
Also how does the VX compare to the EBs at the same timings? I.e. both at DDR500 at 3-2-2-5. Would the "Enhanced Bandwidth" make a difference?
In the end, I have to go to Fry's tonight and I want to know if with my rig it's worth to give the VX a try.

Thanks!

[Micutzu]

Intels do not benefit that much from the tight timings, TCCD gives better results. There's really no point in using 260Mhz 2-2-2 when 300Mhz+ 3-4-4 is faster and usually needs under 3.0V to run.

[cuddles]

It's mostly made for A64 systems. Those with Intels don't seem to get as good results, it performs like any other ram from what I've seen on Intel.

[quicksilverXP]

Would it be faster on an A64 to run memory at 300Mhz at 2.5-4-4-8 (or sometimes 3-3-7) or to run these VX on a divider? I'm contemplating on switching from my TCCDs.... but I know for sure these can't hit 300 HTT 1:1... and I only have an Athlon64 3000+ with the 9 multi.

[KuRi]

Quick tests, 100% stable:

http://koti.mbnet.fi/rnm/discipline/3200VX/

[NoX]

There's really no point in using 260Mhz 2-2-2 when 300Mhz+ 3-4-4 is faster and usually needs under 3.0V to run.

I would agree with you if I had a cpu that could run at 300Mhz FSB.

[Grov]

Yeah the price ain't to bad on em, cheaper than the 3200EB TCCD or whatever it is, well here in the UK anyways.

Sold my Corsair C2PT 2x512mb for 110quid, got these for 190quid, so not to bad there. Big upgrade.

Gotta get a booster though.

[Tony]

I hit 250fsb 2-2-2-5 on the 875P-T at 3.2Vdimm dual channel, wxchaser hit 260+ on a p4c800 so they can clock well on these rigs also.

[ojdr2001]

For some reason I'm not getting more than 235 stable 3D 2-2-2-5 DC 1T

Did this @ 3,5V. Went up to 3,75V and no gains...

MSI K8n Neo2 FX55 bios 1.36b

Could it be MOBO Bios or just bad luck on this pair?????

And for some reason cannot change CAS in A64 Tweaker. Have to boot with cas 2 from bios...

[ryanpgroovy]

intels run well at 2.5-2-2 but not at 2-2-2

[OPPAINTER]

Just did a 3d2001 comparison of my Mushkin BH5 512Mb and my VX 1Gig

ATI 9800 Pro, at stock clocks
MSI Neo2 and 4000+ at 10x260 2600MHz
Memory at 260Mhz 2-2-5 Cas2 A64 tweaked out the same
Windows XP SP2

You'll see the 1Gig of VX utilizing the 2-way Interleave beating out the 512Mb of BH5 and No-way Interleave

I believe that if this CPU was doing say 13x260 at 3380MHz this difference in the score between the 2 memories would be much larger.

OPP

[MaxxxRacer]

interesting info you got there opp.the difference is inperceptible to our senses, but its still there.. going for that last extra fps the vx do help out

[Rabbi_NZ]

OPP, do you know if the Interleave benefits are also seen on Socket 754 or only the DC AMD64s?

[cuddles]

VX wins!! *ding ding ding*

[OPPAINTER]

OPP, do you know if the Interleave benefits are also seen on Socket 754 or only the DC AMD64s?

Sorry, I don't remember seeing it, but then again I don't think I ever used a Gig on 754. May or may not be there
Looks like you have a gig on a 754, do a Sandra mem bench and see if it says it's there.

OPP

[G|-|oST]

OK what exactly is the 'interleave' referring to? 1T/2T?

[OPPAINTER]

Nothing to do with 1T. Heres somthing I found on the net, old school.

OPP

-------------------------------------
The chipset can interleave requests to different DRAM banks and gain a massive performance boost from it (relatively speaking). Without interleave, a typical session would be:

Latencies while refreshing DRAM
Send address to bank w
Receive data from bank w
Latencies while refreshing DRAM
Send address to bank x
Receive data from bank x
Latencies while refreshing DRAM
Send address to bank y
Receive data from bank y
Latencies while refreshing DRAM
Send address to bank z
Receive data from bank z

This makes extremely poor use of the bus, since we can refresh the DRAM simply by reading or writing to it.If we have some interleaving going on, we make far better use of the bus.

Latencies while refreshing DRAM
Send address to bank w
Send address to bank x, receive data from bank w
Send address to bank y, receive data from bank x
Send address to bank z, receive data from bank y
Receive data from bank z


All four banks can be accessed in turn, without having to refresh the RAM and wait the killer CAS. This is four-way interleave. Two-way interleave is only two banks at a time.

The only time you will be unable to set 4-way is if you're using a very small amount of RAM. Every DIMM has at least two banks, but 64MB and smaller DIMMs have only two. All larger DIMMs have four. However, if you use two two-bank DIMMs, you have a total of four banks and can use 4-way. Always set this setting, then, to 4-way and don't expect any problems from it. Bank interleaving was not covered in the RAM guide, so I've gone into a bit more detail here.

[DoGMaN]

This is single channel DDR400 2-3-3-7 MSI K8N Neo with a 3200+ CH 4-way interleaving

[hollywood]

After the thousands of posts and numerous threads on the VX, it puzzles me that you wouldn't know where to purchase a set. Fry's Electronics has 'em. mWave has them as well. And the list goes on...

Thank you Conrad. We don't have Fry's on the East Coast and thats the only place I saw people talking about.

oop's hit edit..my bad ment to quote.

[3NR1C0]

The problem these days is if you don't use 1gig and only have 512Mb like BH-5 in most cases, you lose out on performance. The 1gig gives you 2-way interleave, 2 gigs will give you 4-way interleave. This is on S939 motherboards anyway.
So haveing 1 gig or higher is in if you can use aggressive timings,, so now you have VX

OPP

Sorry Opp, I don't understand. Can't I enable 2 or 4-way interleave 2*256 BH-5 with?

[Sgt_Strider]

I'm curious here, is it the reason why these RAM are so good is because you can pump some serious voltages into them? How does it overclock if you use <3.0 v? Like maybe 2.8v?

[3NR1C0]

skt 939 as well.