Athlon 64 Memory: Rewriting the Rules
by Wesley Fink on October 1, 2004 12:45 AM EST- Posted in
- Memory
Test Results: Crucial Ballistix PC3200
To be considered stable for test purposes, Quake3 benchmark, UT2003 Demo, Super PI, Aquamark 3, and Comanche 4 had to complete without incident. Any of these, and in particular Super PI, will crash a less-than stable memory configuration.| Crucial PC3200 Ballistix (DDR400) - 2 x 512Mb Double-Bank | |||||||
| CPU Ratio at 2.4GHz | Memory Speed | Memory Timings & Voltage |
Quake3 fps |
Sandra UNBuffered | Sandra Standard Buffered |
Super PI 2M places (time in sec) |
Wolfenstein - Radar - Enemy Territory fps |
| 12x200 | 400 DDR | 2-2-2-10 2.6V 1T |
514.0 | INT 2622 FLT 2799 |
INT 6082 FLT 6033 |
81 | 110.3 |
| 11x218 | 438 DDR | 2-2-2-10 2.6V 1T |
520.9 | INT 2815 FLT 2952 |
INT 6471 FLT 6402 |
80 | 111.5 |
| 10x240 | 480 DDR | 2.5-2-2-10 2.7V 1T |
526.2 | INT 2917 FLT 3101 |
INT 6703 FLT 6625 |
79 | 112.6 |
| 9x267 | 533 DDR | 2.5-3-3-10 2.75V 1T |
529.1 | INT 3029 FLT 3258 |
INT 6960 FLT 6870 |
79 | 113.2 |
| 8x297(2.38GHz) | Highest Mem Speed 594 DDR |
3-4-3-10 2.85V 2T |
513.8 | INT 2897 FLT 3080 |
INT 6708 FLT 6647 |
80 | 110.3 |
| 9x278(2.5GHz) | HIGHEST Performance 556 DDR |
3-4-3-10 2.85V 1T |
536.5 | INT 3117 FLT 3299 |
INT 7165 FLT 7109 |
76 | 116.1 |
As we first saw on the Intel test bed, Ballistix continues to astound with fast memory timings at the DDR438 (2-2-2) and 480 (2.5-2-2) speeds. The biggest surprise, however, was the added bandwidth that we achieved on the Athlon 64 test bed. Where Ballistix topped out at DDR514 on our Intel tests, we were able to reach DDR594 - right at DDR600 - on the Socket 939 testbed. While this did require a 2T Command Rate, we still achieved DDR556 at a 1T rate.
We have asked AMD to provide some insight into why we are getting much higher speeds with the Micron chips on the Athlon 64 Socket 939 platform that we have seen in testing on the Intel platform.
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xeoph - Wednesday, March 9, 2005 - link
I also wanted to mention it in this artical if it hasnt been already.The pricing above the ultra X is for Ultra Platinum. The www.memory-up.com link is a little misleading because it doesnt give the exact tech specs.
simply a mistype. m-400-512x2glx1gb3200dc is what your looking for, little X between gl and 1gb.
mervine - Sunday, October 10, 2004 - link
hi WesleyYou mention the newer Samsung TCCD chips overclock better on AMD64 than the older ones, How long have these new chips been avaliable?
The reason I ask is I live in europe and stocks over here might not be as new as in the states. I'm looking to buy some ocz rev2 but is there any way to tell if its using old or new revision TCCD?
PrinceXizor - Tuesday, October 5, 2004 - link
Wesley:I appreciate your point. I suppose I would have been vaguer in my statements than you were, that is my only point (probably a matter of subjective opinion of course). Something like...
"In the course of testing, it was discovered that we were being adversely limited by the power supply used in our testing rig. Switching to a higher wattage power supply unlocked the potential of many of these DIMMS. While the actual problem with the original PSU requires more analysis time than we had for this review (lower wattage? lower rail amperage? lower rail tolernaces?), hard-core overclockers should carefully inspect the specifications on their PSU's if they plan on maxing out the OC on their memory modules. Switching power supplies, as we did, may help you to reach the overclocks attained in this review."
Something like that is all I would have liked to see, instead of a blanket recommendation for a higher wattage PSU. That was my point.
All this being said, I still enjoyed the review! I look forward to more memory module reviews in the future.
P-X
jynxycat - Tuesday, October 5, 2004 - link
good review, i was on the edge between the PQI and Crucial sticks, not really knowing what to expect from the PQI on an AMD setup.finally a full review of what the respective sticks will achieve on the AMD platform, very much appreciated.
Blappo - Sunday, October 3, 2004 - link
42:That is true. It might be interesting to see a comparison of PSUs to see which one would give the highest overclock. I would guess that the PSUs with high ratings would perform well, but there might be some lower power PSUs delivering good quality power that perform well, or some high output PSUs that perform poorly because of low quality power.
darkwaffle - Sunday, October 3, 2004 - link
41:I'm not sure how much of a direct comparison you could make between the 3 PowerStream models, because according to http://www.ocztechnology.com/products/PSUSpec.pdf the +5 rail differs on the 420 and 470, and the +12 rail is different on all of them.
Blappo - Saturday, October 2, 2004 - link
I would be curious if using either the 420W or 470W OCZ PowerStream models would change the amount the memory could be overclocked? Since they are in the same model line then any differences when OC would be attributed to the amount of power available, and not the quality of power available.LocutusX - Saturday, October 2, 2004 - link
I've got the one Wesley mentioned. It's the Enermax EG465P-VE - the *Q4 2001* model. That same model which is *currently* available in stores has slightly different specs. Anyways, I think I'll keep in mind a possible upgrade to the Powerstream since that would probably help my OC situation as well.KingofFah - Saturday, October 2, 2004 - link
#14,15,20,24(This is more directed to #20)
As Wesley said:
+3.3V - 38A
+5V - 44A
+12V - 20A
-5V - 2A
-12V - 1A
+5Vsb - 2.2A
are the specs of the 465 they used.
Considering they switched to 520W OCZ Powerstream:
+3.3V - 28A
+5V - 40A
+12V - 33A
-5V - .5A
-12V - .5A
+5Vsb - 2.0A
Even though there is a drop in amperage on the 3.3 and 5v rails, there is a great increase in the 12v. CPU, GPU, HDDs, Optical drives, fans all get there power off of the 12v line.
Since w = v x a, if you want a good power supply, it almost certainly will have a lot of watts on it, but you only find good amperage on high quality models... So maybe you can see why they said +500 quality PSU??
My question is: Which rail does the memory draw from? Is it still the 5v?
Marlin1975 - Saturday, October 2, 2004 - link
Wesley Fink, since it has been shown many times that more and more current systems need better power. Why not do a review of power supplys. Everything form top dollar name brand ones to cheaper high "watt" ones to see if they put out what they say at each rail and if they help or hurt a system when doing normal work to over clocking?I know power supplys are one of the most over looked items and I am building a HIGH power system right now and can not find any real reviews other then other people saying use or don;t use brand X
Thanks