Not for overclocking though
However, MSI’s Afterburner (which I use for overclocking) along with most other GPU overclocking utilities (like ASUS GPU Tweak) allow you to circumvent these restrictions easily on the R9 270. By doing so we were able to boost that overclock from 1050MHz/1500MHz to 1154MHz/1520MHz up from the stock factory speed of the graphics card which is 975MHz/1400MHz.
We were able to push the core clock up to 1,080MHz before things became unstable. This is a 13 percent increase over PowerColor's core speed but a more impressive 17 percent over the AMD reference clock for the GPU. It's also 30MHz higher than the stock speed R9 270X, and as the graphs show the R9 270 becomes more powerful as a result, since clock speed is the only performance factor where they differ. We were able to push the same GPU to 1,190MHz on the R9 270X, however, so unsurprisingly the single PCI-E power connection of the R9 270 does limit its overclocks by comparison.
As for the memory clock speed, we were only able to reach 1.525GHz (6.1GHz effective). This is still a healthy 9 percent boost, but we did reach higher speeds with the memory on our R9 270X.
We found a small tweak that will bring your boost frequency towards roughly 1050 MHz stable, it will fluctuate depending on power draw / limits. Feel free to try our settings yourself. The BIOS is locked to 1050 MHz btw.
As usual, MSI includes their AfterBurner software, which is one of my favorite utilities for GPU overclocking. Unfortunately, I wasn’t able to get any voltage controls, but increasing the power target to +20, I was able to hit a solid 1150MHz core (20% improvement) and 1500MHz memory (7% improvement). Remember that the R9 270 Gaming’s core clock is already overclocked beyond AMD’s reference design by 50MHz (~5%), so the R9 270 Gaming definitely has a ton of overclocking potential.
Gigabyte R9 270 – Übertaktet (1.147/3.204)
We managed to raise the 945/5,600MHz shipping frequencies to 1,060MHz core and 6,300MHz memory, beating the clocks of the R9 270X.
The PowerColor R9 270 we received already had a minor 50MHz core overclock and we actually weren’t able to push things much further. The core topped out at only 1020MHz which is a far cry from the 1144MHz we achieved on the R9 270X while memory had a bit more overhead and could easily hit 6076MHz. These certainly aren’t the best results but they do point towards the possibility of lower default voltage being used in an effort to reduce the R9 270’s power consumption figures.
1050Mhz achieved on Gigabyte R9 270
The Sapphire Dual-X R9 270 OC came clocked at 945MHz on the core and 1400MHz on the memory. We were shocked to find that AMD OverDrive lets you overclock the Sapphire card future than you could on the MSI card. With this card you can go up to 1100MHz on the core and 1625MHz on the memory!
Overclocking the Sapphire Dual-X R9 270 was a bit tougher to do as it didn’t like how power control settings and we were unable to get anything over 1050MHz on the core stable. We settled at 1050MHz core, 1625MHz memory and +5% on the power control settings as our final stable overclock.
http://www.hardwareheaven.com/reviews/1878/pg12/sapphire-dual-x-r9-270-graphics-card-review-power-temps-and-overclocking.htmlOVERVIEW OF BOARDS
Sapphire Dual-X R9 270 1055/1600
* MSI (According to Legitreviews , custompcreview shot): one 6mm and one 8mm heatpipe , 95mm fan blade diameter (100mm fans I'd assume) ... 4 unlabeled phases for core, 2 for mem
* ASUS (according to eteknix): pair of 80mm fans with a pair of direct contact 8mm copper ; 6+2 phase
* Sapphire (according to Legitreviews , kitguru): card uses two 8mm heatpipes. 74mm fan blade diameter (80mm fans I think) , looks t be 4+2 phase with direct copy of HD7870 VRM orientation
* HIS IceQ X2 (According to overclockers): : triple heatpipe , 2 x 75mm fans , 4+1 phase "drmos"
* Powercolor (according to bit-tech): 1 large axial fan (90mm diameter?) , one large copper heatpipe (unknown diameter , looks large diameter) , 4+2 phase
* Gigabyte (According to Techpowerup , xtremehardware): two heatpipes (unknown diameter , looks like one S heatpipe to me...), Dual 100mm fans (computerbase says 92mm?) , 4+2 according to xtremehardware
^ a lot of Elpida memory use throughout...
I'm not surprised power savings was achieved with <950Mhz clockrate since the Firepro W7000 has a single pcie power connector and is 1280 shaders (Pitcairn).
It irks me they took out voltage control however , a lot of OnSemi (no voltage control) similar to GTX 660 /GTX 650 TI Boost and company.
edit: Market overview Nov 20 from ocholic: http://www.ocaholic.ch/modules/smartsection/print.php?itemid=1161Edited by AlphaC - 11/20/13 at 12:43pm