Bro, I thought you are planning to go for the Artic Cooling Accelero Twin Turbo Pro, change of mind?
If you are planning to get the T-rad2, two slim fans like the Scythe Musashi or equivalent slim fans should do the trick:


Always manually overclock your graphic card bro, autotune isn't perfected in OC'ing your card, too much variables (data, logarithm, Voltage & stability factor, etc.) to be calculate accurately.
And that high clock speed that your autotune configured really needs intimate attention that only 'manual overclocking' can give.

I did my research and most people advice to go for MK-13 or Trad2 because both are better than TTP.

I'm currently hunting for slim fans, but still haven't found any.

Anyway, I think there's only minor difference in terms of performance between Schyte Musashi, Trad2 and Trad2 GTX, and since it's very hard to find Schyte, I opt to go for Trad2.

Thanks man.

This post has been edited by gto87: Aug 16 2010, 06:26 PM

T-rad 2 has minimal different if u mount with 2x92 slim fans or 1x120mm fans . I am using T-rad myself though. Well only Scythe has slim fans (aint cheap)

sifus, i want to know what is the latest stable version for sapphire 2gb hd4850 x2... on the sapphire website the latest is 10.7, so i want to know whether this version got bugs or not? thx.

Unfortunately I'm a bit of a Noob when OCing still learning the trade so theoretically I get the idea, but I'd have to know what to look for in the settings

Fortunately for you OC'ing graphic cards are waaay easier than OC'ing processors and RAMs.

Overclocking with stock voltage:

Benchmarking:
~From your stock clocks, 850mhz, just skip to 900mhz (memory clocks at 1300mhz) and take it from there by doing stress test (to see any signs of instability like anomalies such as artifacts, vertical lines, reboot, etc.)
~When you are satisfied with the stability, increase and increment of 10mhz, so 910mhz. Then do the stability test.
~Again when stable, increase by 10mhz to 920, then do stability test.
~Repeat until you encounter instability.
~When you hit the instability mark, decrease by 5 mhz and relatively start to increase the memory clocks from 1300mhz in increments.
~If you still unstable, decrease by increments of 2 mhz untill you are confident with the stability of the card.

24/7 Usage:
Above method is to see your MAX clocks setting that is stable, now for 24/7 usage, you are to factor in the following:
-temperature
-memory clocks

Temperature is prominent in overclocking a card, even though a certain card can overclock pretty high, if the temps exceeds that of a safe temperature operation of the card, if will reduce it's life longevity.
So for 24/7, you are to prioritized the temps over performance, as appose to benchmarking were to push the cards performance but endure a little heat for a brief amount of time.
So Google up (and ask around this AMD Radeon Thread) and ask around fellow 5770 users what is the safe max LOAD temp when overclocked the card a well s the IDLE temp of your overclocked card.

Memory clocks is advisable to not be excessively overclocked, but adequate enough to maintain stability when in conjunction with the core's clocks when overclocked.
e.g. If you were to overclock your 5770 Vapor-X to 950mhz/1xxx mhz, you need to find the low stable 1xxx (memory clocks).


Alright, everything what I said are the briefs and highlights of how to overclock your graphic card, do more deeper research and ask around a lot ya!
I can't help much coz I don't owned the 5770 so I dunno the overclockability of this card, if you own a 5850, I can help you out for sure...

Sifu,

Need some advise...to connect pc to LED Full HD tv to watch movie via HDMI, any graphic card to recommend?

Thank you in advance.

budget??

HD5670 range if it is not overkill coz the system is purely for HD home entertainment, not gaming.

Thank you in advance

This post has been edited by syong888: Aug 16 2010, 11:04 PM

Safest one for 5770 at 1.125v would be Core:900/Memory:1300.
Im at Core:900/Memory:1275 though..

Well the EAH Cucore 5770 would allow u to tweak the voltage... how do u do that with a Sapphire Vapor-x? I haven't search in the bios yet though (Asus M4A785TD-V EVO)

---

Added on August 16, 2010, 11:38 pmok thx so much for this, how long should the test run for?

This post has been edited by Clem1982: Aug 16 2010, 11:38 PM

i tried to overclock my 5870 to 900/1300, when started playing games like blur ... sure get vertical lines and crashed ... please help !

need more voltage for your gpu core..

I think it's too much mhz for the memory clocks, don't think you really need to bump up the memory clocks 100mhz just to overclock your core clocks to 900mhz. Around 1250mhz or even untouched @ 1200mhz or lower could do it,
if that doesn't do it, so could bump up the voltage from 1.15v to 1.2v. But to try to play around with the memory clocks first, voltage bump is the last step if you can't stabilize the card.

Hello, I would like to ask what's your idle temperature for 5970 at 30% fan speed and room temperature of 297 K. My one seems to be hot averaging from 340K-344K.

Thanks in advance if anyone who is or are able to provide some information regarding this.

K you mean by Kelvin? I prefer Kelvin for anything with thermodynamics properties, but universally, everyone is used to celcius, so I'll go for that.
Your average (66.9c-70c) should be fine if your IDLE temps is around 50c~ish and LOAD temps no more than 85c.

Having said, why don't you give your IDLE temps and LOAD temps instead of an average - which is a bit vague to do some comparison.

Oh thanks. Because I can't seem to find a unit for Celsius. So Using Kelvin would be a more proper presentation . As mentioned earlier, My idle temp at room temp of 24 Celsius average at about 64- 71 Celsius not 66.9-70 with fan speed at 30% no overclocking as 0 Celsius =273 K.
Anyway, When it is load it will rise to 80+++ Celsius . And according to the info i got from various reviews and forums . I found out most user with the same fan speed of 30% and not overclocked is ranging from 50-55 at idle.
I knew i live in My and most of them are located in USA and EU so on even room temp of 16C which is somewhat equivalent to the temperature of their environment my 5970 still average at 62-68 Celsius at idle

Thus , i highly doubt it is running at normal temperature. =(

Thanks again for the response.

Although I don't own this card, I read enough amount of reviews and your LOAD temps is about right I suppose, with the LOAD temp floating within the region of 80C > x < 85C.
If a bit than 85C is just the temp differentials of day/night because the day and night temp in M'sia varies a handful.
When it reaches the 90c mark is when you are to pay attention.

Your IDLE temps, does both of your GPUs idle at 157mhz/300mhz?
Probably it's just this country...but as you know, you got 2 GPU's is a single card! and the stock copper block cooler although bigger than the single gpu cards, it still not enough...I guess this is were the heat issue spawns.
Other variables could be the airflow of your scout sniper, etc.

Anyways, as you know, different cards are uniquely different to one another, do not judge too critically of your card's temp...by the temp readings of your card, I think it's in the premise of being okay/acceptable, but of course you can, however, improve your temp with bumping up the fan speed on a level which is audibly bearable.

Unlike other graphic card overclocking software (including Asus's Smart Doctor), with MSI Afterburner you can set the percentage of the fan accordingly to temp instead of one absolute fan percentage ,because you don't want a high percentage fan speed that was initially set for your LOAD temp to be used for your IDLE temp, it would be tedious to change the fan % preset every time.
Below is how I set my "dynamic" fan preset according to the temp change:



My curvature start to steepen up immensely after 60c because I try to force the temps to not to go higher than 68c, plus this is the 'profile' I use for moderate-high overclocking.

This post has been edited by JoBigShow: Aug 17 2010, 02:08 AM

Well it was at 1.2v stock.. lol.. i undervolted it back to 5770 original stock voltage which supposedly is 1.125v..

Tried MSI AfterBurner?

For a Radeon HD5870, Stock Voltage can OC until 934-935MHz for the Core and 1278-1280MHz for Memory.

Increase Voltage can do higher OCing. That's only true for the Core MHz, while the Memory MHz is hard to increase even if you have very high voltage.