oK
here's the conclusion from one review on the OCz 850w ... they are all pretty similar
http://www.overclock3d.net/reviews.php?...ge=1&desc=ocz_gamexstream_850w_atx_psu
as to Johnny's *ripple* :wine:
JG's conclusion on the Seasonic: <<"Not to rush anyone through this review, but I don't think ripple needs much comment. It's almost nonexistent!">>
His conclusion on the OCZ : <<"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."
He also stated: "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.">>
If you look carefully at the 850w OCZ Review at Overclock3D they also measured ripple and found: <<"Good results from both the +3.3v and +5v rails here. Neither dropped by any significant amount and both remained well within ATX specifications. These results are slightly better than the recently reviewed GameXStream 700w which just goes to show that OCZ have been working on improving the performance of this unit in all areas.">>
that's *why* i picked it --JG's opinion notwithstanding.
yep, you DO get what you pay for ... and i got a midrange PS that is very capable indeed of pushing out 850w.
i don't need rolls royce when bentley will *do*
:laugh:
here's the conclusion from one review on the OCz 850w ... they are all pretty similar
http://www.overclock3d.net/reviews.php?...ge=1&desc=ocz_gamexstream_850w_atx_psu
Introduction
Just over 2 months ago I was given the opportunity to review OCZ's high-end 700w GameXStream unit. Proving that performance, silence and efficiency could all coexist in a small ATX sized package led to the unit nabbing our "Editors Choice" award. Since then OCZ have been hard at work tweaking the existing design and uprating components to push a further 150w out of the GameXStream's excellent design.
In essence, the 850w GameXStream is visually the same in every way as the 700w unit (externally at least), and for this reason I'd suggest that anybody who has already read our 700w GameXStream review should turn to pages 5, 6 & 7 to avoid a severe case of Déjà Vu. Over these few pages I'll be looking to answer the question:- Is there really such thing as a normal ATX sized, silent, efficient power supply capable of delivering a stable 850w?
[the conclusion]
Conclusion
When talking about power supplies, the general rule of thumb is more power = more noise. This is because in order to combat the extra heat produced by higher wattage power supplies manufacturers need to install more powerful (and noisy) cooling solutions.
However, this rule has been totally disproved by the OCZ GameXStream, which managed to produce a full and stable 850w of power without the noise and heat associated with other high wattage units we've tested in the past. Add to this the fact that the OCZ GameXStream is no bigger than your average ATX power supply along with its excellent efficiency level of over 85% (as tested by our equipment) and it's hard to even consider using another power supply for your high-end future gaming PC.
In recognition of these excellent qualities I need to congratulate OCZ for being the first company in the history of Overclock3D to receive our "Best In Class" award. This award signifies that the OCZ GameXStream 850w PSU is considered by Overclock3D to be the best all-round power supply in the 600w - 900w classification.
The OCZ GameXStream 850w is currently available from Specialtech for the very reasonable price of £115.
Pro's
? Rock stable voltages.
? Ultra-high efficiency.
? Very silent for an 850w PSU.
? Fully sleeved cables.
? 36 month warranty with fast support.
? Internal adjustable potentiometer.
? Standard ATX size (amazing for a unit with this much power).
Con's
? Nothing worth talking about. A first for any PSU here at OC3D!
as to Johnny's *ripple* :wine:
JG's conclusion on the Seasonic: <<"Not to rush anyone through this review, but I don't think ripple needs much comment. It's almost nonexistent!">>
His conclusion on the OCZ : <<"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."
He also stated: "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.">>
If you look carefully at the 850w OCZ Review at Overclock3D they also measured ripple and found: <<"Good results from both the +3.3v and +5v rails here. Neither dropped by any significant amount and both remained well within ATX specifications. These results are slightly better than the recently reviewed GameXStream 700w which just goes to show that OCZ have been working on improving the performance of this unit in all areas.">>
that's *why* i picked it --JG's opinion notwithstanding.
yep, you DO get what you pay for ... and i got a midrange PS that is very capable indeed of pushing out 850w.
i don't need rolls royce when bentley will *do*
:laugh: