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View Full Version : Why do 5600 & 5200 cards require a MOLEX plug?


DSC
03-13-03, 08:17 AM
Man, talk about inefficient power usage, are they so power hungry that you need to plug in your PSU into the cards????? :eek: :eek: :confused: :confused: :mad:

MuFu
03-13-03, 08:34 AM
The power connector is needed for NV31 operation above 375MHz but I am guessing that figure was established on a reference-grade AGP platform. They no doubt included it just to be on the safe side with crappy mobos/PSUs (more on the OEM side) and it will help overclocking too, of course.

The 5200 Ultra is basically an overclocked NV34 on an unnecessarily expensive PCB (the same one as the 5600 Ultra - P140). Due to it being a 0.15u ASIC, I am guessing they run in to similar power limitations despite the lower transistor count and again have included the external feed just to be safe. The additional component cost is almost insignificant.

There is a version of each model that doesn't require the connector: NV34 on P161 (250/200MHz, TSOP, "5200") and NV31 on P141 (~325/275MHz, TSOP, probably called the "5600").

Hope this helps clear it up a bit. :)

MuFu.

DSC
03-13-03, 08:56 AM
Thanks for the info, MuFu.

But still, those will be much worse in performance, especially the 5200 non Ultra, seeing how bad the 5200 Ultra is. :eek: :eek: :eek:

MuFu
03-13-03, 09:06 AM
Yeah, I suspect the 5200 Ultra is no more than a "token" mainstream offering from nVidia which was drafted in rather late in the game to compensate for the underachieving NV31 (it has been plagued by yield issues and buggy functionality for months). I believe the target clockspeeds for the NV31 were initially 5600 Ultra: 450/350Mhz and 5600 (non-Ultra): 350/275MHz, so you can see how the range has been "compressed" as a result of the reduced performance ceiling. It's not suprising that we haven't seen a 5600 (non-Ultra) yet.

The AIBM/OEM take-up rate for NV34 has been astonishing - it really is extremely attractive from a cost/features point of view. Performance is almost irrelevant in the OEM/low-end consumer sector, as has been mentioned many times already.

As more and more AIBMs adopt the boards it'll become clear that the external power connector is in fact optional. Here is MSI's NV31 offering, for example:

http://teamhardware.com/images/reviews/cebit2003-1/67.jpg

MuFu.

DSC
03-13-03, 09:58 AM
MuFu, is that an Ultra or non Ultra?

Here's an interesting question thats been playing on my mind, we know about NV35 and NV36, the replacements for 5800 and 5600, would there be a NV37/8 to replace the NV34(cheaper, faster, less buggy ASIC based on NV35)?

MuFu
03-13-03, 10:15 AM
Originally posted by DSC
MuFu, is that an Ultra or non Ultra?

Probably a non-Ultra (looks that way from the PCB anyway). I'll check and get back to you.

Here's an interesting question thats been playing on my mind, we know about NV35 and NV36, the replacements for 5800 and 5600, would there be a NV37/8 to replace the NV34(cheaper, faster, less buggy ASIC based on NV35)?

NV34 is already reletively bug-free, very cheap and seems to perform just about ok. I doubt they'll be replacing it around the time of the NV35/NV36 debut, although I guess it's possible they have something lined up for later in the year (maybe a low-end, 0.13u part). Not sure to be honest.

MuFu.