4770 with 4870 crossfire?

[pastymuncher]

So did i. DFI LanParty LT X48, E8500 @4Ghz with 1.328v, 4870, 2x2 gb pc2-8500, X-Fi extreme gamer, 5x fans, Zalman ZM-MFC2 multifunction controller, 2x WD AAKS sata ll hdds and a sata dvdrw.

 

[willhub]

So what's the verdict? Worth a try with crossfire?

 

[gurusan]

yes. your psu is fine!

 

[RavenXXX2]

So what's the verdict? Worth a try with crossfire?

I suggest a corsair HX750 as a replacement for current and future builds, remember to not dispose of broken electronics in the bin.

 

[willhub]

I have to think carefully here cause I know allot of people do over estimate and you see em running systems like mine on 850W PSU's

 

[RavenXXX2]

Do you think it's worth pairing up two 512mb cards? not time for an upgrade?

 

[willhub]

I'm thinking about cost benefit here.

Paying 60 quid for an extra card, I would get more performance for the money than paying over 150 quid for say a 5870 or 5850.

 

[RavenXXX2]

Yeah but turning up the eye candy in the latest games is going to max out that 512mb fairly quickly then it's lag city.

 

[gurusan]

At 1680x1050 it depends. For example in BC2 I rarely hit over 800mb usage with 4xAA 16xAF, all high details at 2048x1152. I reckon at 1680x1050 and 2x or even 4xAA would not max out 512mb. Then again that's just 1 game.

 

[willhub]

What games?

 

[RavenXXX2]

Texture heavy games like crysis and metro 2033, BC2 textures are of very low quality for the most part, no doubt because of its console roots.

 

[phatboy]

I have to say coming from a 19in point of view, i have never capped my 2 4770's enough to induce lag with everything rammed up. so obviously its going to add a bit more strain at Will's res' but as said i reckon you should be ok.

 

[Meaker]

your PSU for a start, a decent 650-700 watt min with 42a on 12v.

Nonsense.

A corsair 520W is a decent PSU it should be able to handle max loads.

 

[RavenXXX2]

Nonsense.

A corsair 520W is a decent PSU it should be able to handle max loads.

LoL if you like living on the edge of system failure all the time, be my guest, to say a 520 is well enough for a full system including xfire 4870's and an overclocked CPU @ 4Ghz is well misinformed TBH.

 

[gurusan]

no it's not ffs. I've seen the HX520W powering more than that just fine

 

[RavenXXX2]

http://www.tweaktown.com/reviews/1481/sapphire_radeon_hd_4870_in_crossfire/index13.html

The above with the bare minimum hardware and running 3D06 lol, I go by facts not hearsay, a 520 watt PSU is on the limits, corsair or not.

 

[Meaker]

LoL if you like living on the edge of system failure all the time, be my guest, to say a 520 is well enough for a full system including xfire 4870's and an overclocked CPU @ 4Ghz is well misinformed TBH.

I have sat with a power meter, 2x 4870s and 1 highly OCed Q6600 on a 500W enermax PSU.

Running furmark and a CPU stress test it stayed at around just over 500W from the wall socket.

I think thats perfectly acceptable for full load thats never really going to happen to be around 80% load.

 

[Meaker]

http://www.tweaktown.com/reviews/1481/sapphire_radeon_hd_4870_in_crossfire/index13.html

The above with the bare minimum hardware, I go by facts not hearsay, a 520 watt PSU is on the limits, corsair or not.

WALL POWER CONSUMPTION

Consider a 500W PSU that is 80% efficient, at max load it would draw 600W from the wall.

 

[gurusan]

Yeah that's power consumption at the wall.

Also the OP has a wolfdale which barely consumes anything. My p45-ud3p used to say my E8400 @ 4.5GHz consumed around 70-75W max under IBT.

As stated, assuming the PSU is 80% efficient then the system is actually only drawing around 340-350W

 

[RavenXXX2]

520 watt maybe fine in the short term " like two week lol " but running at full capacity " which it will be " will inevitably take its toll on the PSU then boom.