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SFX PSU for GTX 580? - Page 3

post #21 of 44
Thread Starter 
Quote:
Originally Posted by friend'scatdied View Post

The closed loop is linked to both the CPU and GPU. With a single 120mm radiator that's just an awful idea, moreso when all that hot air becomes the only intake for your case (FT03 Mini).
A GTX 580 by itself shouldn't be more than $250 nowadays as a fair price relative to the latest generation.

I've gotten the ability to test it with an ivy i5-k and the thermals are just fine (with those two radiator fans as the only fans in the whole system). Lower than 50C as the MAX when running highest stress I expect for hours straight. Yes it's not a full awesome water loop, but with limited testing, it appears to work as advertised. If you have an idea of how to prove it one way or the other while I still have this loaned rig, please let me know.
post #22 of 44
Quote:
Originally Posted by Din65 View Post

I've gotten the ability to test it with an ivy i5-k and the thermals are just fine (with those two radiator fans as the only fans in the whole system). Lower than 50C as the MAX when running highest stress I expect for hours straight. Yes it's not a full awesome water loop, but with limited testing, it appears to work as advertised. If you have an idea of how to prove it one way or the other while I still have this loaned rig, please let me know.

Define the "different machine?" Chances are it's not as constricted and cramped as the FT03Mini, nor in the same orientation.
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post #23 of 44
Quote:
Originally Posted by Din65 View Post

I've gotten the ability to test it with an ivy i5-k and the thermals are just fine (with those two radiator fans as the only fans in the whole system). Lower than 50C as the MAX when running highest stress I expect for hours straight. Yes it's not a full awesome water loop, but with limited testing, it appears to work as advertised. If you have an idea of how to prove it one way or the other while I still have this loaned rig, please let me know.
I find that hard to believe.... what do you mean by "stress testing"?.. what exactly are you running?
post #24 of 44
Quote:
Originally Posted by Original Sin View Post

I find that hard to believe.... what do you mean by "stress testing"?.. what exactly are you running?

Quote:
Originally Posted by Din65 View Post

If an H-series cooler is recommended I don't see why this setup gets so much hate? I installed it in a different machine and the temps never rose above 50 with Crysis 2 at max for a few hours.

redface.gif

I think something like Linpack/IBT or P95 alone for a few hours with even little-to-no GPU utilization would paint a different picture. Let alone some GPU-taxing benchmark with P95 in the background..
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post #25 of 44
Thread Starter 
Quote:
Originally Posted by Original Sin View Post

I find that hard to believe.... what do you mean by "stress testing"?.. what exactly are you running?

I have core temp and gpu-z installed. Tell me what to run and for how long (preferably something reasonable) and I'll report the temps here. I admit my ignorance on what are good cooling solutions so I'll grab some real data and you tell me. I could even change the fans to vertical if it matters.
post #26 of 44
Was the i5 or gpu oc'd? A 120mm rad is barely able to handle a stock 580 under load letalone an oc'd i5.

Just assume that a closed loop120mm rad can effectively dissipate 120w of heat (in my experience even that's unrealistic), an oc'd i5 running at 4.5ghz @ 1.35v will be putting out ~140+ watts of heat, this by itself is ok (still pretty poor) but when you add a 100+ watt gpu you can see where mathematically and realistically the little closed loop 120mm rad will end up being a useless hunk of aluminum.

Regardless of what case you are using, this is a poor option (not flaming just trying to help).

Really I think you should reconsider where you are putting your money.

A 660ti can out run a 580 easily with stock cooling, it will also consume less power, and generate less heat.
Most importantly it costs LESS!

With the ~100 dollars you will save you can get a little h60/70/80 that will cool an i5 with a decent oc.

I'd also tell you to get a different case than the little trashcan. But that's up to you as it's mostly aesthetics, tho the case is poorly designed to handle the heat you will be putting out.
    
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post #27 of 44
Quote:
Originally Posted by Din65 View Post

I have core temp and gpu-z installed. Tell me what to run and for how long (preferably something reasonable) and I'll report the temps here. I admit my ignorance on what are good cooling solutions so I'll grab some real data and you tell me. I could even change the fans to vertical if it matters.

As suggested above, run Prime95 Large FFTs and Furmark/Kombustor for 30 minutes... let us know about the temps.
post #28 of 44
Quote:
Originally Posted by Blue Basher View Post

Just assume that a closed loop120mm rad can effectively dissipate 120w of heat (in my experience even that's unrealistic), an oc'd i5 running at 4.5ghz @ 1.35v will be putting out ~140+ watts of heat........
No, a Sandy I5 at 4.5Ghz (~1.3v for most samples) will be drawing around ~100W at full load (usual workload) and about 10-15% more in synthetics.... and those are VRM measurements, not what actually reaches the CPU (considerably less in most cases, 80-90% of what's measured at the VRM, depending on the quality of the VRM and the testing conditions)..... so, you won't be seeing 100W draw from an I5 below ~5Ghz (1.4v+).
post #29 of 44
No, but I could chuck it in for you if you want.. If you do send me a PM.
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post #30 of 44
Quote:
Originally Posted by Original Sin View Post

No, a Sandy I5 at 4.5Ghz (~1.3v for most samples) will be drawing around ~100W at full load (usual workload) and about 10-15% more in synthetics.... and those are VRM measurements, not what actually reaches the CPU (considerably less in most cases, 80-90% of what's measured at the VRM, depending on the quality of the VRM and the testing conditions)..... so, you won't be seeing 100W draw from an I5 below ~5Ghz (1.4v+).

Ahh, you may have me there as I just used a psu calculator to generate my numbers lol. Chances are it wold error on the high side.

I don't own one nor will I ever, but isnt the tdp of a stock i5 95w, I can't wrap my head around how a 1100mhz jump would only generate ~5 watts more?

Also won't a CPU consume more power during a CPU/GPU intensive application as opposed to a strictly CPU instnsive application?

Not trying to call you out, just trying to answer sone of my own questions haha.
    
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