OCZ VX Revisited: DDR Updates on DFI nForce4
by Wesley Fink on March 30, 2005 12:05 AM EST- Posted in
- Memory
Final Words
Conclusions have not really changed in our update to DDR performance testing on the DFI nForce4. Across the board, OCZ VX is the fastest memory that we have tested when comparing equivalent speeds. However, we also found that other top-performing DDR memory also does better on the DFI nF4. The result is that other top DDR memory is capable of achieving similar performance to VX, although they require higher CPU speeds and memory speeds to offset the slower memory timings and slower performance of the memory chips at the same speed. Results were closer between top competing memory than it appeared in our initial review, and we found this to be almost completely attributable to the better performance of nVidia 71.84 compared to the earlier 61.77 drivers.In the end, the fastest memory that we have tested is OCZ PC4000 VX Gold. Across the range from DDR400 to DDR533, it outperforms any DDR memory that we have tested. This certainly proves that timings do indeed still matter, and 2-2-2 timings combined with a faster memory chip can yield impressive performance levels. The "gotcha" is that you will need a lot of voltage - up to 3.6 volts - to reach these performance levels. The DFI nF4 pair are the only productions boards we are aware of that can supply these kinds of voltages. You can also achieve these voltages on some motherboards by using the OCZ DDR Booster.
There is certainly good news for other top memory on the DFI nF4, however. Almost all of the memory could achieve roughly equivalent performance to the OCZ VX Gold at higher memory speeds and higher CPU speed. TCCD at 318x9 or 280x10 were roughly equivalent to VX performance at 267x10. This required both higher CPU speed and higher memory speed to offset the advantage of fast 2-2-2 timings and fast Winbond chips in OCZ VX. Crucial Ballistix came closest to OCZ VX performance across the curve, since Micron chips do appear more equivalent in performance to Winbond than Samsung TCCD. However, TCCD can reach higher memory speeds, which offsets the Ballistix advantage if your system is capable of the higher speeds. Corsair was particularly fast for a TCCD memory in the 466 to 533 range, exactly where it is targeted. The Corsair did not do as well at the highest speeds on the DFI as it has done on other platforms, but that can likely be fixed with a BIOS revision. In the end, everyone's top performances were pretty comparable.
If you have the means to reach the voltage levels required by VX , then OCZ Gold VX is definitely the fastest memory that you can buy. It tops out at DDR533, but it is just as fast at that speed as TCCD at DDR636 or DDR560 at higher CPU speeds. All 4 memories can achieve similar top performance levels, but OCZ VX Gold does it at the lowest DDR speed and fastest timings. Across its bandwidth of DDR400 to DDR533, OCZ VX Gold is the fastest memory that we have tested. At the top, other top DDR can match VX performance, but they require higher CPU speed and/or memory speed to offset the memory timing advantages of OCZ VX Gold.
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renzokuken - Wednesday, March 30, 2005 - link
Wesley, you've made my day. Thankyou for this follow-up review. The only thing I didn't like is the following statement "The Corsair did not do as well at the highest speeds on the DFI as it has done on other platforms, but that can likely be fixed with a BIOS revision". I'd love to know if/when this BIOS revision will be released and how much it will affect the Corsairs results.Btw, if anyone can tell me how to change the password required to post a comment I would be eternally grateful
arswihart - Wednesday, March 30, 2005 - link
zebo, i have no idea what you tried to just sayJoKeRr - Wednesday, March 30, 2005 - link
look at corsair and mushkin tccd (3200s) that doesn't use BP pcb, they almost never break 260 eitherJoKeRr - Wednesday, March 30, 2005 - link
but I don't ballsitix uses BP pcb, if it does, it will prob. kill tccd.Zebo - Wednesday, March 30, 2005 - link
Consistancy. It's not there. Just browse various forums.. some like us report kick arse performance some can't even get 220Mhz out of it w low timings.When you buy TCCD any moron can get at least 275Mhz out of it which is very appealing until you look past sisuck numbers. Also, in general, TCCD is more flexible because of that. Can run 2-2-2 @ 200 just like Ballistix but can also run up around 300Mhz and everything in between. I've never seen ballistix posting at anything above 275 w/1T.
Zebo - Wednesday, March 30, 2005 - link
"anandtech is the biggest dfi propaganda site on the web"They use the best mobo in mem guides this is nothing new where you been? Back in NF3 days it's was MSI NEO2..Back w intel tests it was Asus..actually this is the first time I ever seen them using DFI which stand to raseon since it's the NF4 winnar.
ozzimark - Wednesday, March 30, 2005 - link
#35-one thing i never understood. ballistix (more the micron -5b chips than ballistix itself) has an amazing performance/ocing to cost ratio. plus, it oc's at tight timings fairly well without much voltage. how come it was never very popular like BH-5/UTT and TCCD?
Zebo - Wednesday, March 30, 2005 - link
Joker, Ballistix is essentially EB..so it likes up to 3.1 too but runs hot...need to cool it activly and have a mobo which staggers mem like DFI's.. i.e geographically in slots: Mem--Blank--Mem--Blank to allow air flow.I personally run 245Mhz 2.5-2-2 1T @ 2.8
But screwing around w/ volts I get 261 2.5-2-2 w/o error But since I'm a silence freak it's not for me.
Still this winbond UTT mem is better overall if you plan to send high volts to mem anywayz
Zebo - Wednesday, March 30, 2005 - link
"TCCD isn't the holy grail of RAM anymore."It never was. It's loose arse timings always got whooped by Ballistix, and especially "old" BH-5 in the benchmarks running async with tight timings and moderate BW. This new ram is from co that brought you BH-5 and it's prolly better except it can't run 1.5 CAS.
arswihart - Wednesday, March 30, 2005 - link
anandtech decides to focus on dfi and ocz as a magical combination, no matter what qualifications they make in the article they are still selling these specific products to readers. Its reflected in the forums and probably in sales. I don't like how anandtech's articles are beginning to constantly offer suggestions and declarations about the best this and that (often just based on what they have reviewed to date, not all that is available).