I cannot believe how powerful the Accelero S1 Rev2 is

[Modular]

Load temps went from 110c max in COD: World @ War (With the stock cooler at 85%, once temps hit that level the fan ramped up to 100% till they came down) to 55C max with teh Accelero.

Temps taken with Rivatuner 2.20. This is without a fan on the thing too. I don't see the point in adding a fan as the GPU is nowhere near overheating like before. The power circuitry and ram used to top 115C and are now rarely above 65C. This thing is amazing.

One nitpick is how poorly the Mosfet sinks fit on the card. I had to add some thermal tape to make them stick. No big deal I guess, unless you don't have the stuff lying around.

Idle temps went from 70-75c to a solid 36/37. Room temp is generally 22C or so (70ish degrees). I am soooo glad I spent $25 on this thing!

 

[yh125d]

The Accelero is good, but it shouldn't be that good. I wouldn't be surprised if the old fan wasn't turning, or maybe the heatsink had a really shitty mounting job. Either way the stock fan wasn't working right. The 4850 is a pretty cool running card, and even in a case with no fans any stock cooler working properly wouldn't get near 110c

 

[Modular]

Originally posted by: yh125d
The Accelero is good, but it shouldn't be that good. I wouldn't be surprised if the old fan wasn't turning, or maybe the heatsink had a really shitty mounting job. Either way the stock fan wasn't working right. The 4850 is a pretty cool running card, and even in a case with no fans any stock cooler working properly wouldn't get near 110c

Hmm, I'd have to disagree with most of this. From what I saw when I took the old HSF off, there was sufficient contact with the GPU and thermal tape on the ram chips. The 4850 has never been a cool running card. One of the major complaints had to do with the temps that the card put out without overriding the fan speed. I'm sure that the stock fan was working, as I could hear a noticeable change in noise and see a change in temps when I changed the speed of the fan via the drivers.

 

[soccerballtux]

Originally posted by: Modular

Originally posted by: yh125d
The Accelero is good, but it shouldn't be that good. I wouldn't be surprised if the old fan wasn't turning, or maybe the heatsink had a really shitty mounting job. Either way the stock fan wasn't working right. The 4850 is a pretty cool running card, and even in a case with no fans any stock cooler working properly wouldn't get near 110c

Hmm, I'd have to disagree with most of this. From what I saw when I took the old HSF off, there was sufficient contact with the GPU and thermal tape on the ram chips. The 4850 has never been a cool running card. One of the major complaints had to do with the temps that the card put out without overriding the fan speed. I'm sure that the stock fan was working, as I could hear a noticeable change in noise and see a change in temps when I changed the speed of the fan via the drivers.

"never been a cool running card" is one thing but 110C is rediculous.

Maybe ATI/AMD is pursuing planned obsolescence.

 

[yh125d]

Originally posted by: Modular

Originally posted by: yh125d
The Accelero is good, but it shouldn't be that good. I wouldn't be surprised if the old fan wasn't turning, or maybe the heatsink had a really shitty mounting job. Either way the stock fan wasn't working right. The 4850 is a pretty cool running card, and even in a case with no fans any stock cooler working properly wouldn't get near 110c

Hmm, I'd have to disagree with most of this. From what I saw when I took the old HSF off, there was sufficient contact with the GPU and thermal tape on the ram chips. The 4850 has never been a cool running card. One of the major complaints had to do with the temps that the card put out without overriding the fan speed. I'm sure that the stock fan was working, as I could hear a noticeable change in noise and see a change in temps when I changed the speed of the fan via the drivers.

I must have been confusing it for a different card. Either way 110c wasn't right, there had to be some other factor at work

 

[LOUISSSSS]

i've seen video cards ramp up to 100C+, they still work. my 8800gt must've been there for about 20-30 mins when i forgot to monitor it + ramp up fan speeds with RT.

theres nothing wrong with a 110C video card, i bet it still works too.

glad the accelero works.

 

[error8]

I've installed an accelero S1 on a friend's 4850, using a slow 120 mm fan strapped on it. The result: 39 C under load!!!! That is the lowest temperature I've ever seen on a videocard under load, on air. The accelero S1 is a monster on 4850 cards.

 

[error8]

Originally posted by: LOUISSSSS

theres nothing wrong with a 110C video card, i bet it still works too.

I must disagree with you. 110 C is quite a lot for a card . It should be able to take that temperature for just a short time, but in the long run, it could be fatal..

Someone else on this forum had a 9600GSO that was folding 24 hours a day at 95 C and it died, after a couple of days/weeks.

 

[Zap]

Originally posted by: error8
The accelero S1 is a monster on 4850 cards.

It's also a monster on other cards too. I have one on an 8800 GT and it works great. Er, make that "had" because someone's buying it. I'm not going to try the S1 on my GTX 260 though.

 

[Elfear]

Originally posted by: Zap

Originally posted by: error8
The accelero S1 is a monster on 4850 cards.

It's also a monster on other cards too. I have one on an 8800 GT and it works great. Er, make that "had" because someone's buying it. I'm not going to try the S1 on my GTX 260 though.

+1

I had one mounted on a 4870 with a pair of silent 120mm fans. Load temps were high 30's low 40s after hours of Crysis.

 

[brandonb]

I don't have the Accelero, but I've had a similar experience with the cooler I purchased (see sig). I went from about 100c to about 50c. I don't know what it is, but the 4850 default cooler is not worth anything.

 

[Concillian]

Originally posted by: brandonb
I don't know what it is, but the 4850 default cooler is not worth anything.

This isn't true.

I've seen people get better overclocks with the stock cooler than with lower temps on an aftermarket cooler.

Why? Because the GPU temp isn't the problem on the 4850... the VRM temp is.

The stock cooler has a decent heatsink on the VRMs and the fan sits almost directly on top of those VRMs. It is engineered to cool what needs to be cooled efficiently and to otherwise be as quiet as possible.

IF you pay special attention to the VRMs, then you can do well with aftermarket cooling. However a lot of people slap on an aftermarket cooler with no attention to the VRMs, then have issues with VRM temperatures.

Low core temps mean very little on the 4850 without also having low VRM temps.

I was able to change my overclock capability from around 650ish going up to a stable 750 (which I run 24/7 at 740 to give a little margin) without changing the GPU temp even 1 degree (accelero on both, so very low in general). The only changes was the attention paid to cooling the VRMs.

 

[chizow]

Originally posted by: Concillian
Why? Because the GPU temp isn't the problem on the 4850... the VRM temp is.

Yep, I've seen quite a few threads and growing evidence showing ignored VRM temps causing card failure. These after-market solutions work great for cooling the cores themselves, but like you said, special attention needs to be paid to the VRMs for stable overclocking.

 

[MustangSVT]

yep I have one on my 8800gs and its very niceeee

 

[imported_harlanpepper]

Interesting. I'm actually surprised your idle temps were that high, though I don't have experience with the 4850. My (neutered) 4830 barely breaks 30c idle on stock cooling at 690/1000 overclock and about 52c is the most I've seen it under load. Makes me wonder if my temp monitoring is accurate (using GPU-z)? I'll have to give Rivatuner a try to see what it shows. Regardless, it sounds like the Accelero has given you good results.

 

[Modular]

Originally posted by: Concillian

Originally posted by: brandonb
I don't know what it is, but the 4850 default cooler is not worth anything.

This isn't true.

I've seen people get better overclocks with the stock cooler than with lower temps on an aftermarket cooler.

Why? Because the GPU temp isn't the problem on the 4850... the VRM temp is.

The stock cooler has a decent heatsink on the VRMs and the fan sits almost directly on top of those VRMs. It is engineered to cool what needs to be cooled efficiently and to otherwise be as quiet as possible.

I hate to nitpick, but this isn't correct, at least not in relation to the stock cooler on 4850's. For reference, this is the exact card I have. I got it a few days after launch when they all had this POS cooler on them. As you can clearly see from the pictures, the fan does not actively cool the VRM's at all. They are passively cooled.

You're correct about properly cooling the VRM's though, I'm going to be adding an 80mm fan to the Accelero just over the VRM heatsinks. This should ensure that I have good temps on those things. It's too bad Rivatuner and GPU-Z don't show the VRM temps, but I think it's obvious that they need some sort of cooling be it passive or active. I can't imagine leaving the chips bare...

 

[error8]

Why not add an 120 mm fan? It moves more air and it's more silent then an 80mm one.

 

[videogames101]

Originally posted by: error8
I've installed an accelero S1 on a friend's 4850, using a slow 120 mm fan strapped on it. The result: 39 C under load!!!! That is the lowest temperature I've ever seen on a videocard under load, on air. The accelero S1 is a monster on 4850 cards.

My 4870 hits 34C idle at 80% fan.

Stock cooler, bitches.

 

[yh125d]

Originally posted by: videogames101

Originally posted by: error8
I've installed an accelero S1 on a friend's 4850, using a slow 120 mm fan strapped on it. The result: 39 C under load!!!! That is the lowest temperature I've ever seen on a videocard under load, on air. The accelero S1 is a monster on 4850 cards.

My 4870 hits 34C idle at 80% fan.

Stock cooler, bitches.

Is your desk next to a furnace?

I think I'll pick up an accelero for myself after this thread

 

[error8]

Originally posted by: videogames101

Originally posted by: error8
I've installed an accelero S1 on a friend's 4850, using a slow 120 mm fan strapped on it. The result: 39 C under load!!!! That is the lowest temperature I've ever seen on a videocard under load, on air. The accelero S1 is a monster on 4850 cards.

My 4870 hits 34C idle at 80% fan.

Stock cooler, bitches.

And your hearing has not been affected? At 80%, it does exactly like a tornado.

 

[yh125d]

Question to anyone who has one, can you fit two 120mm fans on it or just one? What about 2 92mm fans?

 

[error8]

You can fit 2X120mm fans. It's a bit tricky, but it's doable. I've done it with a couple of zip ties.

 

[yh125d]

Awesome.

I found it here for $25 + $5 shipping, since Newegg is out of stock every time I look

 

[error8]

But you do know that it doesn't fit on your GTX260!?

 

[conlan]

Originally posted by: Elfear

Originally posted by: Zap

Originally posted by: error8
The accelero S1 is a monster on 4850 cards.

It's also a monster on other cards too. I have one on an 8800 GT and it works great. Er, make that "had" because someone's buying it. I'm not going to try the S1 on my GTX 260 though.

+1

+2

Have one on my 8800GT which ran very hot w/ the stock cooler.
I originally bought a Turbo Fan to use on it but later found through testing that i didn't need it. The Accelero cools just fine passively.