Just a quick answer; passive, just side fan pushing the air. on stock clocks (573.75/688.50) for now:
S1
36 gpu/40 ambient (idle)
<52 gpu/48 ambient (load; 40min of stalker non-stop, without loading levels or anything)
stock cooling was
47gpu/44 ambient (idle)
72gpu/52 ambient (load)
More tomorrow and next few days
Btw, should I put something on backside, I think that's PWM as well.. stock cooler was on that part but now I've got nothing there.. will post pics later if I find some of that part. (found them, below; I've marked them on pics, not all were covered so I hope it doesn't have to be cooled, works so far..
)
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EDIT: Overslept a bit today, but I've tested my previous max OC 661,5/762,75 which was unstable in few "heavy" games, and now it seems 100% stable, and temps are 55,6C GPU, and 49C ambient after 20 minutes of running only firefly forest (3DMark06). Just for the record, on default clocks I got 0,5 higher GPU temp, and same ambient like I had yesterday playing stalker for 40 minutes.. so I guess some 20 loops of 3DMark fireflies will be an easier way to check the temps, specialy since it's best artifact-checker for memory stability that I've yet found
EDIT2: I've tested with all I've had, and 100% stable is 648/742.5; temps are always <54C for core, and 48C for ambient. Now that I've got stable overclock on passive I'll see what are temps with other setups, with the same clocks. Once I pick my setup I'll flash Kexx's memory timings, and see what memory clocks can I get with those.. It will take some time, but I'll get back to you ppl
Btw, is there some better ATITool than my 0.27 (beta something)? Cos in artifact checker it sometimes shows "dots" of corrupted pixels, but it doesn't react on them... so I had to stare at it myself for half an hour, lowering clocks bit by bit when needed :/
EDIT3:
Here are tested temps on my Radeon X1950PRO, 512MB, @ 648MHz core / 742,50MHz mem
Nothing special or scientific, I've just run firefly forest 3DMark06 in 20 loops every time, that pushes it to the max, maybe it could go like 0,5C higher if i'd run it for extra 15 minutes, but I didn't bother, so that's how it was tested.
all temps are with GPU first, and ambient temperature after, logged by Rivatuner, with max shown during those 20 loops (about 20-something minute test). First row is idle, second is max under load.. Idle isn't logged quite under same conditions, as sometimes I'd wait longer to stablize, sometimes less, but I wouldn't say there are much differences.
Stock cooler (only data took from earlier readings in games and other tests; on default clocks)
idle: 47/44
load: 72/52
S1 passive + side 250mm fan ON
35/39
53,5/48
S1 + 120mm fan + side 250mm fan ON
(120mm fan is GlacialTech Silent Blade; 19dB; 37CFM -
bought here for <10$)
31/34
46/43
S1 + 120mm fan + side 250mm fan OFF
(I've put side of the case on a side of desk to "plug" the hole a bit, simulating closed case with no side fans/windows)
35/39
48,25/46
S1 + 120mm fan + 250mm ON
(120mm fan is turned for 90° so it pushes air from front of the card towards back of the case)
36,5/40
50/46
S1 + turbo module + 250mm side fan ON
35/38
46/44
Conclusion:
- turbo module and 120mm silent fan are about the same, but I'll give 120mm advantage cos it's cheaper, even quieter, and cools a bit better; not to mention that if you've got fan regulator of some sort you can tweak the speed/noise ratio to your preferences much better than with Turbo's..
- best cooling is with good case airflow (like my 250mm side fan
) and 120mm fan on S1, though even just good case airflow is enough to keep everything much cooler than with stock cooler
- over 35% cooler GPU (both idle & load) and about 20% cooler ambient temps - great!
- with 120mm fan with higer CFM, or 140mm one, or even dual 120mm's you'll have crazy cool graphics card - it's all about how much noise you can stand from all the extra fans (or how much you're willing to spend on a few high-CFM/low-noise fans)
I'm left to test completely passive cooling (no side fan, no fan on cooler itself), but with 120mm fans costing like 5-10$, it would be crazy to keep it with no extra airflow (IMHO)
I'll also try to get Zalmana ZM-F3, as it should have better CFM on 5V than my Glacialtech Silent Blade on 12V (with about same noise levels), and on 12V it's a hurricane
So I'll repeat few tests with it on both 5&12V, and probably will try dual 120mm then (my Glacialtech + Zalman on 5V; so it's still pretty silent).
So anyone planning to OC this X1950 card, get yourself an Accelero S1 and one or two 120mm fans
Next step in OCing is flashing tighter memory timings, and fixing best cooling setup in this test (meaning 120mm+250mm, both turned on). Than I'll have to play with clocks a bit as well, to find max stable clocks for those new timings, and will post my results after that
Cya in a day or two!