XSPC Rasa 750 RS360 kit from Frozen CPU

[techguy2k5]

Sorry if these are noob questions and OFN, but I'm curious if it would be worthwhile as a starter water cooling kit. My only experience with water cooling has been closed loop systems (Corsair Hydro series) and I'd like to go to an open loop so that I can upgrade later. I have a HAF 932 and I'm eventually going to go SLI and Sandy Bridge but I figured I could gain some lower temps and slightly better OCs on my current setup (Q9550 @ 4GHz, GTX 570 @ 875/1750/4400) in the mean time.

So my questions are this:
1) is this a good starter kit?
2) is a single 3x120mm rad enough for CPU+GPU loop?
3) which full GPU block should I get?
4) any suggestions on additional hardware? tubing, barbs, fluid, etc. (comes w/ 7/16" ID tubing and 1/4"->1/2" barbs)
5) will I need to add another pump if I add another radiator (or two) on the side panel? (can accommodate two 2x120mm rads)

thanks in advance

[bundymania]

1. yes it´s ok
2. depending on what cpu and gpu you have and which fan speed do you prefer could be ok or not
3. koolance, aquacomputer, watercool
4. 16/10mm tubing, 11mm fittings
5. 1 pump is enough, even for 2 rads. go for a laing ddc or d5 + top

[Vetalar]

better go with rX360 kit. it includes very good and thicker rx360 rad.

[pluck]

better go with rX360 kit. it includes very good and thicker rx360 rad.

It also takes up more room, costs a lot more and performs no better. Bargain.

[techguy2k5]

Thanks all. CPU and GPU are those listed, Core 2 Quad 9550 @ 4GHz, 1.34V, Thermalright Venomous X w/push/pull) and GTX 570 @ 875/1750/4400 on stock HSF w/auto fan speed. Fan speed should be below 2k RPM, ideally. This system is in my bedroom and some noise is acceptable, currently it is not very loud, definitely within noise limits.

[bundymania]

9550 + GTX570...ok If there is enough space in your case and because you´re sleeping in the same room, go for a good 480 radiator or triple + single, so you can run the fans with 1000 RPM or lower

[techguy2k5]

I have the HAF 932 which has plenty of room for additional radiators. The side panel can have dual 2x120mm rads, and the rear exhaust can fit a single 120mm rad. If I add another rad, will I need another pump?

[justin150]

As per Bundy
1. yes it´s ok: +1
2. depending on what cpu and gpu you have and which fan speed do you prefer could be ok or not: and of course whether you overclock the hell out of them but see answer to no 5
3. koolance, aquacomputer, watercool: +1
4. 16/10mm tubing, 11mm fittings: 3/8th tubing is fine and a lot easier to work with
5. 1 pump is enough, even for 2 rads. go for a laing ddc or d5 + top: true but if you do not mind spending extra 2 pumps gives peace of mind

[techguy2k5]

Just to clarify, I'm talking about the full kit from XSPC, not just the radiator. Are you saying I should replace the included pump?

[Holst]

Can you list the components included in the kit please

[Garrett]

Google this Holst: XSPC Rasa 750 RS360 kit from Frozen CPU

Then it will show you a link to FrozenCPU


Compatibility: AMD Sockets 939, 754, 940, AM2, AM3
Intel Sockets LGA1366, LGA1156, LGA775, 603, 604
*Requires mounting holes
Radiator Dimensions: 121x35x397mm (WxDxH)
Radiator Thread: 6-32
Pump Bay Res Dimensions: 149 x 100 x 85mm (WxDxH)
Pump performance: 750 lph
Delivery head: 1.8m
Voltage: 12V (4pin)
Fans: Low Noise 1700rpm 120mm Fan x3
Tubing Size: 7/16" ID x 5/8" OD
Included: Rasa Black (Acetal) CPU Waterblock
Socket 775, 1366 and 1154 Backplates
Socket AM2 and AM3 mounting kit
X2O 750 12V Pump/Reservoir
5mm Blue LED with 4Pin Molex
RS360 Radiator
80mm to 120mm Radiator brackets
Low Noise 1700rpm 120mm Fan x3
120mm Fan Grill x3
2 Meters of Clear 7/16"ID Hose
G1/4" to 1/2" barbs x6
Thermal Paste

[Utnorris]

It's a very good kit for the money. Go over to overclock.net for a dedicated thread for the XSPC kits under the water cooling section.

Edit: Here is the link: http://www.overclock.net/water-cooli...-rs-rx120.html

[DavidNJ]

I'm considering the XSPC Rasa 750 kit, but for a CPU only in a CM690 II Advanced mid tower case.

A triple fan radiator should handle a CPU and 1 GPU if it has good airflow. However, it will be dependent on how much you overclock. If you have the CPU up around 200w and the graphics card around 400w, a single 360x120 rad may or may not get the results you want. Martin (I don't know his last name) is really outstanding engineer and fabricator who did testing 2007-2008. His site remains on other sites: http://martin.skinneelabs.com/. It will give you an idea of the flow rate/fan air flow trade-offs vs. heat disipated. There are other tests here that can provide other insights.

Net: The RS240 in the kit will handle the CPU but not the GPU, and may become marginal as you approach 200w (5Ghz@1.5v). A good triple with the right fans can handle the CPU and GPU, but in case mounting reduces airflow (you are pressurizing the case) and a GTX570 + OC Sandy Bridge may challenge a triple radiator, depending on air flow, ambient air temp, fan air flow, and water flow rate. The stock 570 can hit 370w.

[skinnee]

@DavidNJ - I think you are using Watts from the wall, not heat captured by the blocks and dumped into the loop. You have to be running a high Vcore in order to get a chip up to 200w into the loop, same goes for the 570 wattage posted... a GTX480 doesn't come close to dumping 370w into a loop and I know it runs hotter than a 570.

Keep this in mind when looking at watts, there is a big difference from what is pulled at the wall versus what goes into the loop.

[techguy2k5]

Thanks everyone, I've read another thread @ overclock.net where other HAF 932 owners were talking about their experience with this kit and it was very positive, I just wanted to know if anyone here had ever used it and what I could expect to get from it. So now I just need to pick out a GPU block and get some extra length of tube and throw it all together. Then we'll see if I need another radiator and pump to get the temps I want.

I see in that thread of RASA 750 kit owners that there are some people running RX360s instead of the RS360 included in this kit. I wonder if that's an optional upgrade or if they just purchased that separately. Guess I can always call and find out.

Thanks again all.

Any last advice? Being my first open loop I'm not even sure what fluid to buy.

[sabe]

Thanks everyone, I've read another thread @ overclock.net where other HAF 932 owners were talking about their experience with this kit and it was very positive, I just wanted to know if anyone here had ever used it and what I could expect to get from it. So now I just need to pick out a GPU block and get some extra length of tube and throw it all together. Then we'll see if I need another radiator and pump to get the temps I want.

I see in that thread of RASA 750 kit owners that there are some people running RX360s instead of the RS360 included in this kit. I wonder if that's an optional upgrade or if they just purchased that separately. Guess I can always call and find out.

Thanks again all.

Any last advice? Being my first open loop I'm not even sure what fluid to buy.

Distilled water with silver killcoils or pt-nuke

[techguy2k5]

@DavidNJ - I think you are using Watts from the wall, not heat captured by the blocks and dumped into the loop. You have to be running a high Vcore in order to get a chip up to 200w into the loop, same goes for the 570 wattage posted... a GTX480 doesn't come close to dumping 370w into a loop and I know it runs hotter than a 570.

Keep this in mind when looking at watts, there is a big difference from what is pulled at the wall versus what goes into the loop.

I didn't know the infamous skinnee was also from the Twin Cities. Cool beans.

[techguy2k5]

Distilled water with silver killcoils or pt-nuke

Thanks! I think I like the idea of an additive more than I do putting a metal coil in my tubes so I'll go with the pt nuke. Not bashing anyone's decision to use kill coils though.

[techguy2k5]

Looks like Jab-tech also sells this kit but offers the RX360 as an option for $40 more than the RS360 kit. Can anyone comment on whether it would be worth it to go with the RX360 kit instead? Would I perhaps be able to avoid having to install another rad to handle the heat dissipation of my components?

[sabe]

Looks like Jab-tech also sells this kit but offers the RX360 as an option for $40 more than the RS360 kit. Can anyone comment on whether it would be worth it to go with the RX360 kit instead? Would I perhaps be able to avoid having to install another rad to handle the heat dissipation of my components?

RX360 is way ahead of the RS360 when it comes to cooling performance especially with decent fans. I know the HAF X has no problems fitting a RX360 up top, not sure about the HAF 932 so that's something to watch out for. The RX360 is over 60mm thick.

[Utnorris]

The RX360 will give you more cooling power, but it isn't going to be double the power or anything like that. Check out this:

http://skinneelabs.com/triplesv2.html

The RS360 will be comparable to a MCR320.

It also shows a CPU and two GTX275's in one loop so you can get an idea of what to expect from a comparable loop.

[DavidNJ]

There are a lot of tests on radiators, fans, and shrouds. Martin had a radiator spreadsheet that is available on line and actually includes the XPSC RS series.

Net, the XSPC kit includes an excellent waterblock, sort like a Corvette/Porsche, with well-built and easy to install pump/reservoir and radiator, more like a Lexus ES350. You could use the water block on a 200+w CPU. However, the radiator, especially without shrouds and flowing into a case, will be challenged much above 200w for the 2 fan model and 300w for the 3 fan model, The pump can handle the water block and radiator just fine. However, it doesn't generate enough head to drive 3-4 waterblocks (CPU, 2 GPUs, Northbridge) and thick 3-4 fan radiator (GTX360/480, RX360).

Martin's spreadsheets are very good. The radiator one indicates the flow rate and power dissapation vs. flow rate. The other indicates the flow rate for different component choices and plumbing arrangements.

My application, CPU only in a CM690 III case is probably the kits best application. CPU only, the radiator has the capacity and fits in the case. No brackets are required for the radiator or pump/reservoir. And the reservoir level can be checked from the front of the case.

Once you begin multiple GPUs, custom radiator brackets, the need for more hydraulic HP, the kit is probably not the way to go.

[Captain_Harlock]

If you do go ahead as planned and get the kit and GPU block, then dont just get the "extra length of tube". Go ahead and get enough tubbing to do the whole thing, as your more than likely not going to get a tubbing that will match the same clairty of the tubbing that will come with the kit. In short, it will be obvious that it will be two different tubbings and more so as the loop ages and one set of tubbing clouds up more than the other. So keep the tubbing that comes with the kit as spare/emergency tubbing and grab 10' to 15' of the 7/16" (or 1/2") x 5/8" of your choice. If you are going to try and save a couple of dollars, then grab the Masterkleer with your Jab-Tech order. The stuff works great considering its price, but it does cloud up pretty quickly. I've noticed on the last several loops I did with Masterkleer that you could see it start clouding within a three week period. After about 2-3 months, you could clearly see that wonderfull white leaching plastic running through all the tubes and setting in. But again, its cheap and works great with very good strength for bends when you consider its price point. I have no idea what brand is shipping with the Rasa kit, but the Masterkleer is a good brand with known chracteristics. Otherwise, go elsewhere and spend the extra on shipping and grab a good colored tubbing like some pro LRT. Just my two cents on it.

[DavidNJ]

@DavidNJ - I think you are using Watts from the wall, not heat captured by the blocks and dumped into the loop. You have to be running a high Vcore in order to get a chip up to 200w into the loop, same goes for the 570 wattage posted... a GTX480 doesn't come close to dumping 370w into a loop and I know it runs hotter than a 570.

Keep this in mind when looking at watts, there is a big difference from what is pulled at the wall versus what goes into the loop.

The 570 numbers come from one of the tests and were a peak number. However, I had the same conversation with Corsair about the PSUs: the power is to the video cards. A full card cooler will capture a lot of that.



For the CPU, there are online calculators or you can do it quickly, it is frequency * voltage^2. 200w? My calcs say a Sandy Bridge 5Ghz@1.45v should be right around 200w.

Beyond that, and even at that, although no one is reporting it, the transfer from the chip to the Intel cover to the water block/heat sink may become a limiting factor.

[NaeKuh]

Power draw != Heat output.

who told you this?

If you assume 100% power draw as heat output then where is the work being done thats not transfered into heat?

Im sorry ur not understanding how to read those graphs.

And if the GPU is leaky, then how do you explain that?
Those draw numbers will be much much off scale if you have a leaky gpu.