PCIe 2.1 GPU, PCIe 1.x mobo: Potential pitfalls?

Howdy folks,

So finally, it's RIP to the 9800GTX... See my other thread for the sad story.

http://www.tomshardware.com/forum/forum2.php?config=tomshardwareus.inc&cat=33&post=333613&page=1&p=1&sondage=0&owntopic=1&trash=&trash_post=&print=0&numreponse=0&quote_only=0&new=0&nojs=0#t2491449

I've lined up the MSI Radeon HD 6850 Cyclone Power Edition/OC -1GB as a potential replacement. A few things concern me though:

1) Putting a PCIe 2.1 card in a 1.x slot seems to be something of an unknown quantity; works for some, not so well for others. Any advice in this regard would be appreciated.

2) Power is another question mark. From what I understand, PCIe 2 delivers more watts that PCIe 1 did. Hence I'm slighty worried that the slot + one 6pin connector will not be enough to power a 6850. The card only has one power connector, so I can't add a second one for a safety margin.

If the 6850 will not work, I'm open to other suggestions. Systems specs are in my sig.

P.S. StarCraft 2 is the most graphically intense game I own, and that's not likely to change soon.
5 answers Last reply
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  1. I believe they are the same electrically all supplying 75watts "Power
    PCI Express cards are allowed a maximum power consumption of 25W (×1: 10W for power-up). Low profile cards are limited to 10W (×16 to 25W). PCI Express Graphics (PEG) cards may increase power (from slot) to 75W after configuration (3.3V/3A + 12V/5.5A).[8] Optional connectors add 75W (6-pin) or 150W (8-pin) power for up to 300W total."
  2. a good clue is to search your motherboard model + a newer gfx card in google. If any forum results show that it doesn;t work, then I would be wary. the board I used to have, search this http://www.google.com.au/search?source=ig&hl=en&rlz=&=&q=Asus+M2NPV-VM++6850&oq=Asus+M2NPV-VM++6850&aq=f&aqi=&aql=&gs_sm=e&gs_upl=1036l2140l0l2408l6l6l0l0l0l0l344l617l1.0.1.1l3l0#sclient=psy-ab&hl=en&source=hp&q=Asus+p5n-e++5850&pbx=1&oq=Asus+p5n-e++5850&aq=f&aqi=&aql=&gs_sm=e&gs_upl=82194l83546l2l84497l5l5l0l0l0l2l351l1478l2-3.2l5l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=403a1c33a064236&biw=1920&bih=985 and it comes up with many problems. Searched for your motherboard and a bunch of different vid cards and couldn't find any issues.If you like SCII I believe you will be slightly better off with a nvidia card, like the gtx460.
  3. The 460 is becoming very hard to find. No other Nvidia card comes close to the 6850 in my price range. The 550 is overpriced for the performance.
  4. OK, I tried out a borrowed 6850 and it worked, although the performance was not fantastic. In 3DMark06 it benched about 16% better than the 9800GTX. The card was running extremely hot though, which was unexpected.
  5. HD6850 installed and purring like a kitten... Yeah! I haven't put it through its paces properly, but so far I haven't been able to push the card beyond 62C. The Cyclone cooler is amazing...
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