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Antec 620 Mod - Complete

post #1 of 6
Thread Starter 
Add me to the list of completed Antec 620 mods.

GPU: nVidia EVGA GTX 470 (SLI)
Cooler: Antec 620
Lapped: 620 / IHS (IHS not removed)

I didn't create a work log because I didn't want to waste time updating a thread instead of actually doing the work.

I did, however, take a couple of pictures:

IMG_3104.jpg

IMG_3101.jpg

IMG_3100.jpg

As you can see, my case is pretty packed. I don't really want to try to make room for a second 620, but if you notice, I have an aftermarket cooler on the bottom 470. It's a Scythe Setsugen 2, and it does a pretty good job of keeping the card cool.

After running furmark for 1.5 hours, my bottom card was holding at a consistent 92 C under 97-99% load. This isn't a low temperature, but it doesn't concern me as the GTX 470 is rated up to 105C. Seeing as how I don't really have room for another 620, the Setsugen is much more preferable over the stock fan because it is many times quieter, even at full speed.

gpustresstest.jpg

The top card, however, (the one with the 620) peaked at 75C. I'm pretty happy with that. Most games/programs won't stress the GPU to 100% use for the whole time, so with these temps after 1.5 hours, I feel pretty safe that I won't be having any thermal issues.

Just for clarification, the last screenshot showing GPU temps needs a little explanation. The current temps should be ignored -- that just shows what the cards had cooled down to before I could take a screenshot. The max temps are what's important, because the max temps were sustained in furmark. I'm not sure how everyone else is getting their max temp readings, because some seem quite low (like a peak temp of 45C??). If you ran furmark for 1.5 hours and your max temp was 45C, I would be extremely impressed. Then again, I only have one fan blowing over the radiator (although it is a "push" fan), and my gpus are stacked closely, so I'm sure that has some effect. Still, I think my max temps are more realistic and compared to before (90-100C), it's a world of difference.

I lapped the 620 and the IHS. I didn't remove the IHS because I didn't feel like the risk to reward ratio was enough to justify it, but I certainly could've used the extra space removing the IHS would've provided. There is zero room between the cards, but they have just enough space so as not to be exerting an inordinate amount of pressure on each other.

In the near future, I'd like to buy a different case with a little more room. Eventually, I'd like to add two more 620's -- one for my other gpu, and one for the CPU (what the 620 is actually meant for). As I have an intel i7 920 @2.8GHZ, it would be nice to have overclocking capability, and I don't feel comfortable doing that with the stock air cooler. (That said, my temps don't go above 70C under full load as evidenced by Prime95).

So there you have it. I was inspired by all of the success stories here on OCN and decided to do it myself, mainly to reduce noise levels. So far, it's working wonderfully, and I'm extremely pleased with the results. The only bad thing about the install was that I had to bang out a small indentation on the side panel of my chassis because it was preventing the side panel from closing fully. It looks a little jacked up now, but the worst thing about it is that I have to use a little force to screw the panel back in because I changed the way the panel bends when I "modified" it. A new case (or new side panel) would fix that problem. Is it possible to get a generic black sidepanel that would fit my case?
Edited by lukeman3000 - 2/12/12 at 2:53pm
post #2 of 6
Congratulations man! i just modded mine on the same day you modded yours smile.gif works like a charm doesn't it?
post #3 of 6
Quote:
Originally Posted by lukeman3000 View Post

Add me to the list of completed Antec 620 mods.

GPU: nVidia EVGA GTX 470 (SLI)
Cooler: Antec 620
Lapped: 620 / IHS (IHS not removed)

I didn't create a work log because I didn't want to waste time updating a thread instead of actually doing the work.

I did, however, take a couple of pictures:
As you can see, my case is pretty packed. I don't really want to try to make room for a second 620, but if you notice, I have an aftermarket cooler on the bottom 470. It's a Scythe Setsugen 2, and it does a pretty good job of keeping the card cool.

After running furmark for 1.5 hours, my bottom card was holding at a consistent 92 C under 97-99% load. This isn't a low temperature, but it doesn't concern me as the GTX 470 is rated up to 105C. Seeing as how I don't really have room for another 620, the Setsugen is much more preferable over the stock fan because it is many times quieter, even at full speed.

gpustresstest.jpg

The top card, however, (the one with the 620) peaked at 75C. I'm pretty happy with that. Most games/programs won't stress the GPU to 100% use for the whole time, so with these temps after 1.5 hours, I feel pretty safe that I won't be having any thermal issues.

Just for clarification, the last screenshot showing GPU temps needs a little explanation. The current temps should be ignored -- that just shows what the cards had cooled down to before I could take a screenshot. The max temps are what's important, because the max temps were sustained in furmark. I'm not sure how everyone else is getting their max temp readings, because some seem quite low (like a peak temp of 45C??). If you ran furmark for 1.5 hours and your max temp was 45C, I would be extremely impressed. Then again, I only have one fan blowing over the radiator (although it is a "push" fan), and my gpus are stacked closely, so I'm sure that has some effect. Still, I think my max temps are more realistic and compared to before (90-100C), it's a world of difference.

I lapped the 620 and the IHS. I didn't remove the IHS because I didn't feel like the risk to reward ratio was enough to justify it, but I certainly could've used the extra space removing the IHS would've provided. There is zero room between the cards, but they have just enough space so as not to be exerting an inordinate amount of pressure on each other.

In the near future, I'd like to buy a different case with a little more room. Eventually, I'd like to add two more 620's -- one for my other gpu, and one for the CPU (what the 620 is actually meant for). As I have an intel i7 920 @2.8GHZ, it would be nice to have overclocking capability, and I don't feel comfortable doing that with the stock air cooler. (That said, my temps don't go above 70C under full load as evidenced by Prime95).

So there you have it. I was inspired by all of the success stories here on OCN and decided to do it myself, mainly to reduce noise levels. So far, it's working wonderfully, and I'm extremely pleased with the results. The only bad thing about the install was that I had to bang out a small indentation on the side panel of my chassis because it was preventing the side panel from closing fully. It looks a little jacked up now, but the worst thing about it is that I have to use a little force to screw the panel back in because I changed the way the panel bends when I "modified" it. A new case (or new side panel) would fix that problem. Is it possible to get a generic black sidepanel that would fit my case?
I just read your latest posts on the IHS removal, etc.:
http://www.overclock.net/t/1156145/official-guide-modifying-removing-nvidia-gpu-heat-spreader-ihs/140#post_16472562
(Post #141)
Good that you'll be able to re-solder the transistors to the card. Nice photos and description of your mods.
Mounting the 620 directly on the die will drop your temps a lot. It was very effective for me, even with air cooling.

I especially liked the fact that you mentioned that you were running Furmark for load temps. Even that can vary of course, depending on the settings (eg. Xtreme Burn Mode), but at least you said what you were running.

There are too many posts here lately where people are reporting that their cards, after doing the Antec/Corsair/Accelero, IHS, etc. mod, max out at 45C or whatever. Doing what?
Playing Super Mario? Running OCCT? Kombustor? Furmark? Heaven?
I've been guilty myself of quoting "load" temps., without reporting what I ran to load the cards, but I'm trying to avoid that now.

Back to your 620 mod. Even though I'm using two Acceleros (with both IHS removed), I follow the Antec/Corsair mod threads with interest because I appreciate that it is an excellent mod that is very effective.
You mentioned that you intend to get a couple more 620's, one for the other 470, and one for the cpu. That would be great, you will need a bigger case for sure!
There are a ton of good cases out there now, I'm still very satisfied with my 932, which I bought primarily to help cool two 480's. Being able to mount the psu either on the top or bottom of the case, I used the top psu mount. That leaves a lot of room in the bottom of the case for the cards, and allows two 120mm fans to be mounted there. The airflow from the bottom of the case, and the side panel, really helps to keep the cards cool.
There's lots of clearance in the side panels as well, as they come pre-indented!

A Rep+ for this informative post, and your continuing mods:thumb:
Edited by DerComissar - 2/16/12 at 12:07am
    
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post #4 of 6
Thread Starter 
There definitely needs to be a standard for assessing max temps. People just posting their max temps isn't really helpful at all. I would imagine that a lot of people are getting this from playing Battlefield 3 or something similar for awhile and checking the temps on the cards.

I think furmark is a great tool for doing this. Although I didn't give exact details as to the settings I was using, I had the cards' gpu load maxed out at 98-99% the whole time, so that should be some indication. I don't think it really matters as long as you're pushing the card to its limits, and that way you can be sure you know what the real "peak temp" is.
post #5 of 6
Quote:
Originally Posted by lukeman3000 View Post

There definitely needs to be a standard for assessing max temps. People just posting their max temps isn't really helpful at all. I would imagine that a lot of people are getting this from playing Battlefield 3 or something similar for awhile and checking the temps on the cards.
I think furmark is a great tool for doing this. Although I didn't give exact details as to the settings I was using, I had the cards' gpu load maxed out at 98-99% the whole time, so that should be some indication. I don't think it really matters as long as you're pushing the card to its limits, and that way you can be sure you know what the real "peak temp" is.

Yeah you are right. Its good to bench them in a standard like Furmark or Heaven. I will typically run it thru Furmark for stability then run through Heaven benchmark a couple of times to see how it performs.
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post #6 of 6
Thread Starter 
gpustresstest.jpggpustresstestpostIHSremoval.jpg
On the left: Pre IHS Removal (incorrect 620 lapping)
On the right: Post IHS Removal (correct 620 lapping)

Again, please pay attention the the max temps only.

While the most recent test was only ran for 15 minutes, I'm pretty sure that was a sufficient time to get the cards as hot as they were probably going to get. An hour and 29 minutes was probably excessive the first time.

It's important to note that both the gpu and the pcb temperature post IHS removal were both 7 degrees lower. I would put that in the "substantial" category, when it comes to shaving a few degrees off of your graphics card. However, it's interesting the gpu 2 (the one with the scythe setsugen 2 aftermarket air cooler) actually reached one degree higher than it did in the previous test that was ran roughly 6 times as long. The only thing I can attribute this change to is the fact that I recently replaced the intake fan with a "silent" version, which still moves plenty of air, but doesn't have quite the same CFM that my last fan did.
Edited by lukeman3000 - 2/25/12 at 12:27am
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