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AMD Phenom II X4 975 Black Edition 3.6 GHz Socket AM3 Processor Review

AMD Phenom II X4 975 Black Edition 3.6 GHz Socket AM3 Processor Review - PCSTATS
Abstract: AMD's Phenom II X4 975 Black Edition is a quad-core, 3.6GHz socket AM3 chip with 6MB of L3 cache and 512KB of L2 cache per core. It's being released in tandem with the AMD Phenom II X4 840 CPU. Both processors are ideally suited to socket AM3 motherboards built around the recent AMD 890FX or 890GX chipsets.
 88% Rating:   
Filed under: CPU / Processors Published:  Author: 
External Mfg. Website: AMD Jan 08 2011   Max Page  
Home > Reviews > CPU / Processors > AMD Phenom II X4 975 Black Edition

AMD Phenom II X4 975BE Overclocking Report

Overclocking Results:
Stock Max. OC
Processor Speed: 3.6 GHz 4.4 GHz
Multiplier / Bus Speed: 18x 200MHz

19.5x 225MHz

If you're new to Overclocking and not sure what to do, check out these two excellent Guides for some pointers:
Overclocking the CPU and Memory
Overclocking the Videocard

AMD's Phenom II X4 975 Black Edition processor is multiplier unlocked so we can overclocking it simply by increasing the clock multiplier beyond 18.0x, or by boosting the motherboard bus speed above 200MHz. Any combination of these two parameters will also overclock the processor.

PCSTATS is going to aim for a 4.5GHz overclock with this chip, the question is will we manage to get the CPU to agree?

Pre-Overclocking Warm up...

To give the quad-core processor a fighting chance the Corsair XMS3-1600C8 DDR3-1600 test memory was set to run in DDR3-800 MHz mode so it wouldn't hold things back as bus speeds increased. The standard AMD reference AVC Z7U7414001 heatsink will be used for cooling (the latest and greatest heat sinks can be found on Frostytech.com). The overclocking motherboard today comes care of ASUS, the AMD890FX Crosshair IV Formula has so far proved quite good.

Now onto overclocking.

The Phenom II X4 975 BE CPU operates with an 18x multiplier by default, so the first step was to increase the multiplier to 19x, then 19.5x, 20x... 20.5x and 21x. The multiplier was overclocked to 22x as well but this caused the system to immediately crash at POST. In the end, PCSTATS was able to overclock the CPU multiplier to a maximum of 21.5x, resulting in a clock speed of 4.31GHz. Not bad, but we're aiming for higher speeds with this chip!!

Overclocking Motherboard Bus Speed

With the Phenom II X4 975BE's CPU multiplier reset to 18x, we set about overclocking by bus speed this time. Starting from 200MHz, the Phenom II X4 975 BE processor was rapidly overclocked by changing the bus speed to 220MHz, 230MHz and finally 240MHz. Higher clock speeds were tried but the system proved too unstable and would crash while booting up Windows 7. The maximum overclock by bus speed alone was thus 240MHz, or a processor clock speed of 4.334GHz - about the same as before really.

Bus + Multiplier Overclocking

For the final round of overclocking fun, the ASUS Crosshair IV Formula motherboard had its bus speed reset to 200MHz and AMD Phenom II X4 multiplier back to 18x. The AMD Phenom II X4 975 BE was then overclocked with a combination of the two parameters and like an 80's montage this took a while...

To make a long overclocking story short, in the end PCSTATSsettled on a 19.5x CPU multiplier and 225MHz bus speed which left us with a maximum CPU overclock of 4.402GHz. That's a an overclock of 800MHz above the stock speed of the AMD Phenom II X4 975 Black Edition processor and not too bad at all! If you manage to overclock this chip higher, do let PCSTATS know what settings and hardware you use.

Next up, PCSTATS has several rounds of benchmarks to test the Phenom II X4's multi-threading capabilities and find out how it stacks up against Intel's Core i5 and Core i7 processors!

Prelude to Benchmarks

Over the following page PCSTATS will be running AMD's 3.6GHz quad-core AMD Phenom II X4 975 Black Edition processor though our standard set of gaming, productivity, and multi-threaded processor benchmarks. There are a wide variety of real world and synthetic benchmarks to illustrate the different performance qualities users can expect from this quad-core socket AM3 AMD processor. Please take a moment to look over PCSTATS test system configurations before moving on to the individual benchmark results on the next several pages.

PCSTATS Test System Configurations
Test System Reference System #1 Reference System #2 Reference System #3

AMD Phenom II X4 1100T
AMD Phenom II X4 1090T
AMD Phenom II X4 1075T
AMD Phenom II X4 975 BE
AMD Phenom II X4 970 BE
AMD Phenom II X4 965 BE
AMD Phenom II X4 910e
AMD Phenom II X4 840
AMD Phenom II X2 555 BE
AMD Athlon II X4 645
AMD Athlon II X4 635
AMD Athlon II X4 620
AMD Athlon II X3 435
AMD Athlon II X2 240e

Intel Core i5 750

Intel Core i7 920 Intel Core 2 Duo E8400
CPU Process Technology: 45nm 45nm 45nm 45nm
Socket: Socket AM3 Socket LGA1156 Socket LGA1366 Socket LGA775
Clock Speed:

16.5x 200MHz = 3.3GHz (1100T)
16x 200MHz = 3.2GHz (1090T)
15x 200MHz = 3.0GHz (1075T)
18x 200MHz = 3.6GHz (975 BE)
17.5x 200MHz = 3.5GHz (970 BE)
17x 200MHz = 3.4GHz (965 BE)
13x 200MHz = 2.6GHz (910e)
16x 200MHz = 3.2GHz (840)
16.0x 200MHz = 3.2GHz (555BE)
15.5x 200MHz = 2.9GHz (AIIX4 645)
14.5x 200MHz = 2.9GHz (AIIX4 635)
13x 200MHz = 2.6GHz (AIIX4 620)
14.5x 200MHz = 2.9GHz (AIIX3 435)
14x 200 MHz = 2.8GHz (AIIX2 240e)

20x 133MHz = 2.66GHz 20x 133MHz = 2.67GHz 9x 333MHz = 3.0GHz (E8500)
Motherboard: Gigabyte GA-MA790FXT-UD5P (AMD 790FX)
MSI 890FXA-GD70 (AMD 890FX)
ASUS Crosshair IV Formula (890FX)
Gigabyte GA-P55-UD6 (Intel P55)
MSI X58 Platinum (X58 Express)

MSI X48 Platinum (X48 Express)

Videocard: ASUS ENGTS250 DK
(Geforce GTS250)
(Geforce GTS250)
(Geforce GTS 250)
(Geforce 8800GTS)

2x2GB Corsair XMS3-1600C8 DDR3

2x2GB Corsair XMS3-1600C8 DDR3 3x2GB Corsair TR3X6G1600C8D DDR3

2x1GB Patriot PDC32G1600LLK DDR3

Hard Drive:

74GB Western Digital Raptor WD740

Optical Drive:


Power Supply:

PC Power & Cooling TurboCool 750W


Athlon64 K8 Reference Heatsink

Intel Reference 1156 Heatsink Intel Reference 1366 Heatsink Intel Reference 775 Heatsink
Software Setup:

Microsoft Windows 7 Ultimate (32bit)
AMD Catalyst 10.3
nVIDIA Forceware 195.62

Microsoft Windows 7 Ultimate (32bit)
nVIDIA Forceware 195.62

Microsoft Windows 7 Ultimate (32bit)
Intel INF
nVIDIA Forceware 195.62

Microsoft Windows 7 Ultimate (32bit)
Intel INF
nVIDIA Forceware 195.62

System Benchmarks:
SYSmark 2007
PCMark Vantage
SiSoft Sandra 2009

Calculation B/M:
Super Pi 1.5
wPrime 2.0
ScienceMark 2.3
WinRAR 3.8
Bibble 5

Rendering B/M:
Cinebench R10
POV-Ray 3.7
SPECviewPerf 10

Gaming B/M:
3DMark Vantage

< Previous Page © 2018 PCSTATS.com Next Page >


Contents of Article: AMD Phenom II X4 975 Black Edition
 Pg 1.  AMD Phenom II X4 975 Black Edition 3.6 GHz Socket AM3 Processor Review
 Pg 2.  — AMD Phenom II X4 975BE Overclocking Report
 Pg 3.  CPU System Benchmarks: Sysmark 2007
 Pg 4.  CPU System Benchmarks: PCMark Vantage
 Pg 5.  CPU Synthetic Benchmarks: SiSoft Sandra Processor
 Pg 6.  CPU Synthetic Benchmarks: SiSoft Sandra Memory
 Pg 7.  CPU Calculation Benchmarks: Super Pi
 Pg 8.  CPU Calculation Benchmarks: wPrime2.0
 Pg 9.  CPU Calculation Benchmarks: ScienceMark2.3, Cinebench R10
 Pg 10.  CPU Rendering Benchmarks: Bibble 5
 Pg 11.  CPU Rendering Benchmarks: POV-Ray 3.7
 Pg 12.  CPU Synthetic Gaming Benchmarks: 3DMark Vantage, 3DMark 06
 Pg 13.  CPU Gaming Benchmarks: Crysis, FEAR / Conclusion

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   12 / 15 / 2018 | 7:36AM
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