Well cooled 4850 or not great cooled 4870?

maxppp

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I have the option of either a 4850 with a good heatsink for $120 or a 4870 with a slightly hot running heatsink for $153.

I will be running games @ 1680 x 1050.

I have a 500w PSU.

What would you guys choose?

PS. those USD prices are converted from my local currency!
 

maxppp

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lian-li case, well cabled, medium size fan extracting air at the back, fan at roof of case is disconnected for now?
 

maxppp

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The PSU is a q-tec, it has a table of ouputswritten on it, i.e.
+12v, peak 18A, peak watt 216w

Not sure if that means anything...?

 
Can you link to the cards in question? If not from a site in your country perhaps from another like Newegg (USA) or Overclockers (UK)?
Assuming the HD4870 has a reasonable cooler, it's the best way to go as far as performance goes but if you live in a hot climate it might be better to use the better cooled card and sacrifice some performance for a more stable system and less fan noise.

The HD5770 has similar performance to the HD4870, runs cooler and only needs a single power connector but it may be unavailable in your country or just too expensive :(
 
It means the PSU won't support a 4850 or 4870. Sorry.
 

maxppp

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Yep no probs:
Heres the : 4870
Here is the 4850

THe Q-Tec PSU:

o/p peak peak watt
+3.3v 28a 252w
+5v 35a 252w
+12v 18a 216w
-5v 1.0a 5w
-12v 1.0a 12w
 

OK; its an older style ATX version 1.x PSU. That -5v rail gives it away.
I don't believe it has enough +12V power for your system and the new 4850/4850 video card.
 
From a personal experience, having actually had the card I'll say: stay away from the HD4870. The one I had ran at 90C under load at 100% fan speed, which was loud enough to hear clearly through my gaming headphones! It was returned.
The HD4850 seems to be OK, even the Newegg customers seem to like it, which is reassuring enough for me to recommend it.
The bad news is that you will HAVE to change the PSU, its +12v output is not enough to run either card.
 
Here is a more modern ATX ver 2.x 400W PSU data label. Notice the much higher +12V rating - up to 380W. And no more -5v rail.

17-104-046-S05
 

maxppp

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Ah i didnt realise it worked like that.

It currently has a 'new style' antec earth-something(cant pull it all the way out!)380w psu that reads:
+12v/-12v max load 324w
5v, 3.3v max load 130w.

Essentially i just wanted something that had decent linux support and could run tf2 at 1680x1050 and never drop below 60fps.

The rest of the machine is a factory clocked c2d (8400) 3.0ghz with 8gb ddr2 ram. Are there any other nvidia/ati cards that could fit the bill?

Thanks for all the replies btw, youve all been really helpful.