hcapstan
12-27-2006, 03:08 PM
I would like to congratulate you for such an excellent site.
Mi question is the following:
I was about to purchase a PSU OCZ GameXtreme 700w, but yesterday I saw the review that JonnyGuru made, and I obviously desisted from buying it, fue to the problem he mentions.
I am really amazed at the oscillations it presents with maximum load.
http://www.jonnyguru.com/review_details.php?id=35
Things were satisfactory until test 3. During test 3, I started to see ripple on 12V1 and 12V2 that was nearly 100mV. By test 5, the ripple was 100mV on 12V3 and 12V4 and had exceeded 100mV on 12V1 and 12V2. By test 6, the ripple on 12V1 and 12V2 had exceeded 150mV.
ATX specification has an "allowance" for 120mV. Mind you, test 6 was very stressful, pushing the power supply to it's limits, but it doesn't change the fact that the ripple exceeded spec and this is the first power supply to date I have had do this.
What's wrong with two much ripple? Well, if the voltage fluctuates too erratically, it can over work other regulators used to provide Vcore to the CPU, GPU, etc.
A representative of OCZ did find my findings concerning and asked that I return the unit for an exchange. I did so, and in the interim I obtained an FSP Epsilon 600W. The 600W version of the power supply the OCZ GameXstream is based on. In testing that unit, I found a good deal of ripple as well. When a brand new GameXstream was finally returned to me, I immediately plugged it in and found the same results as the first sample.
Fortunately, it is very unlikely any of us will have one of these power supplies at or above 400W, at least for any considerable period of time, but this high ripple measurement will be taken into consideration when calculating the performance score.
I wanted to know if it's really that important to the point of disqualifying it as a purchase. The use I give to the PC is overclocking and gaming:c2d 6600 and 7900gt, soon to have 8800gtx, with 8 fans, hardcano 13 and several other accesories. Today I am using an Enermax All in One 535W, but I assume it's getting small.
I also have in sight a Silverstone ST75F 750W and from what I've read it's excellent in terms of performarnce, but the aestethically it's not good and the price here is superior.
I would appreciate if you could help me make up my mind.
Regards, and congratulations.
Mi question is the following:
I was about to purchase a PSU OCZ GameXtreme 700w, but yesterday I saw the review that JonnyGuru made, and I obviously desisted from buying it, fue to the problem he mentions.
I am really amazed at the oscillations it presents with maximum load.
http://www.jonnyguru.com/review_details.php?id=35
Things were satisfactory until test 3. During test 3, I started to see ripple on 12V1 and 12V2 that was nearly 100mV. By test 5, the ripple was 100mV on 12V3 and 12V4 and had exceeded 100mV on 12V1 and 12V2. By test 6, the ripple on 12V1 and 12V2 had exceeded 150mV.
ATX specification has an "allowance" for 120mV. Mind you, test 6 was very stressful, pushing the power supply to it's limits, but it doesn't change the fact that the ripple exceeded spec and this is the first power supply to date I have had do this.
What's wrong with two much ripple? Well, if the voltage fluctuates too erratically, it can over work other regulators used to provide Vcore to the CPU, GPU, etc.
A representative of OCZ did find my findings concerning and asked that I return the unit for an exchange. I did so, and in the interim I obtained an FSP Epsilon 600W. The 600W version of the power supply the OCZ GameXstream is based on. In testing that unit, I found a good deal of ripple as well. When a brand new GameXstream was finally returned to me, I immediately plugged it in and found the same results as the first sample.
Fortunately, it is very unlikely any of us will have one of these power supplies at or above 400W, at least for any considerable period of time, but this high ripple measurement will be taken into consideration when calculating the performance score.
I wanted to know if it's really that important to the point of disqualifying it as a purchase. The use I give to the PC is overclocking and gaming:c2d 6600 and 7900gt, soon to have 8800gtx, with 8 fans, hardcano 13 and several other accesories. Today I am using an Enermax All in One 535W, but I assume it's getting small.
I also have in sight a Silverstone ST75F 750W and from what I've read it's excellent in terms of performarnce, but the aestethically it's not good and the price here is superior.
I would appreciate if you could help me make up my mind.
Regards, and congratulations.