Table of Contents
My HTPC is made up of parts left over from my previous gaming machine and my previous HTPC.
The video cards, Vision Tek Radeon HD4870 512MB versions, were just too darned LOUD for me to enjoy the system as an HTPC/Light gaming machine (I’m still playing Fallout 3 on it) so I decided to look around for ways to quiet them down some.
I found the Scythe Musashi at CrazyPC for $39.99, so I thought I’d take a chance to see if I could save what’s left of my hearing while keeping the cards relatively cool.
The rest of my computer is :
- XCLIO Coolbox case
- MSI P6N Platinum SLI Motherboard
- Core 2 Duo 2.66Ghz CPU
- 8GB Kingston HyperX DDR2 PC-1066 RAM
- 2.5TB of drives by WD and Seagate
- LG BluRay reader
- LiteOn DVD+-RW Dual Layer (lightscribe)
- 2x Vision Tek ATI Radeon HD4870
- Hauppauge HVR-1800 (Remote)
- Logitech G15
- Kensington Expert Mouse Pro Trackball
- 24″ Dell 2408FPW
There are no instructions for installing this heatsink on the HD4870. The kit did not contain instructions, nor did the PDF file on the Scythe website. It’s straight forward enough though that you shouldn’t have a problem.
1. I removed the OEM heatsink (it came off very easily.)
2 . I cleaned all the goop off the GPU and RAM (See TIPS section)
3 . I installed the heatsinks from the kit (See TIPS section)
4 . I applied some Arctic Silver 5 to the GPU and installed the heatsink portion.
It was here that I ran into an issue:
The heatsink felt “loose” after installation, even after I tightened the bolts down all the way. I decided that I would have to use the copper spacer that came with the kit. Problem was, the spacer was as large as the whole GPU. I cut it down to size with a pair of Reds (metal cutters) and made sure the spacer was flat.
I then removed the heatsink from the GPU and cleaned up the AS5, and put new AS5 on either side of the spacer, then slipped it in between the GPU and the heatsink and reinstalled it and tightened it down. It felt much more secure, though still a just a “little” loose.
I was worried that the “looseness” would affect the temps or even cause damage to the card, but it didn’t. In fact, I was quite surprised at how well it performed!
Within the installation kit could be found two Scythe fans, which could both be installed on one card (which I believe are Scythe Kaze Junior fans in 100mm*100mm*12mm in size).
I used the fans on the the “bottom” one of the two video cards. The “top” Musashi-equipped video card was passively cooled. The case I use, the ABS Black Pearl, has two 120mm intake fans at the top of the case and I installed my case fans oriented so that they blew air into the case, right onto the top card’s heatsink. Because they were cooling the card so well already, I ran the “top” card without the fans that came with the kit.
See below picture to demonstrate my setup:
Ambient Room Temps were 71°F and Temps were measured using ATI Catalyst Control Center and GPU-Z to see if the temps matched up (they did).
Idle Temps (OEM Heatsink/Fan. Fan speed manually set by modifying profile, Stock Clock speed)
Fan speed 39% — 33°C-35°C
Fan speed 65% — 31°C-33°C
Fan speed 89% — 29°C-31°C
100% Load Temp (OEM Heatsink/Fan)
Fan speed 65% — 46°C-48°C
Fan speed 89% — 43°C-45°C
In the above 89% fan speed tests, noise level was 47.8dB at 1 meter
Idle Temps Stock Speed (Scythe Musashi)
Fan speed 100% — 28-9°C (it goes 28, 29, 28, 29, 28, 29, etc)
100% Load Temp with the card over clocked to 790core/1100memory (Scythe Musashi)
Fan speed at MAX (100%) — 42°C-44°C
Because I overclocked the cards, I left the Fan Controls that came with the kit set to 100%. The fans that come with the Musashi kit are so quiet that, even at 100% fanspeed, they are still quieter than my case fans
In the above 100% fan speed tests, noise level was 28.4dB at 1 meter.
On the passive card, the temps were 3°C-4°C above the heatsink with active cooling.
Overclocked as far as CCC will let me, the card runs 1°C cooler and noise was reduced by 19.4dB
At stock speed, at idle, it’s .5°C – 1°C cooler and darned near 20dB quieter.
There’s really no decision to be made here. The choice is a no-brainer. Get the Musashi!
1. Very thoroughly clean all the Ram Modules and other little chips that the OEM Heatsink touches, or the little heat sinks from the kit will NOT adhere properly. I actually very LIGHTLY sanded the RAM modules with 600grit to rough them up a bit.
2. Know that you’ll have to use one of the larger heat sinks for the two little voltage regulators as the kit does not ship with one designed strictly for them. There are more than enough extras though to make one work!
3. Using a pretty fair amount of pressure, hold each heatsink from the kit in place for about 1 minute, then move on to the next. Repeat until done.
1. Because the Scythe Musashi blows the heat into the case, rather than out the back of the case like the OEM, your case temps will rise a little bit. If you have good airflow in your case, this is not a problem. I saw a 1°C rise in my case.
2. Installing the cooler on the 4870 is N-O-T covered in the manual that comes with the kit, nor is it on the Scythe website. I downloaded the PDF manual and looked, and it isn’t in the PDF either.
3. Installing on the HD4870 required the use of the copper spacer that shipped with the kit. If you do not use it, the heatsink will feel “loose” on the card, even if you tighten the screws all the way. I used metal cutters (Reds, as they’re commonly called) to cut the spacer to size.