Retailer photo of ASRock PRO-850B. View this offer in Where to buy
ASRock · PSU · ATX 3.x
ASRock PRO-850B
The current ASRock PRO-850B price from retailers, its key specifications, and how it performs for each job.
Works well for: Gaming PC
Trade-offs: Current price sits $11 above the strong-value threshold (~$44)
- Rated output
- 850 W
- 80 PLUS rating
- 80 PLUS Bronze
- Size
- ATX
- Modularity
- Non-modular
- ATX standard
- ATX 3.1
Move a slider and the page re-scores this product against the same market frame.
What does it cost today, and is that a good price?
Market confidence: LowAt $55 the ASRock PRO-850B is priced in line with its $55 representative market level. Only one retailer currently backs that price, so the level is a single data point rather than a market.
Limited market: only one retailer currently has a verified offer, so treat this price as a single data point.
Prices & availability
ASRock PRO-850B: current price and offers
Compare the offers we track for this model, across variants and retailers.
1 tracked offers · 1 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| ASRock PRO-850B | Newegg | New | $55 | 70 | 2026-10-14 | View offer → |
| ASRock PRO-850BMultiple variants available | Amazon Affiliate | Varies | Find on Amazon | Not tracked | No price snapshot | Find on Amazon → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Performance and where it ranks
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#28 of 77 graded Power supplies
- #25 CorsairCorsair HX1000i 61
- #26 CorsairCorsair RM1000x ATX 2.53 61
- #27 be quiet!be quiet! DARK POWER 14 1000W 61
- #28 ASRockASRock PRO-850B 52
- #29 PhanteksPhanteks AMP GH 850W Black 52
- #30 be quiet!be quiet! Pure Power 12 850W 52
- #31 ThermaltakeThermaltake Toughpower GT 850W ATX 3.1 52
Value Balanced
How much of that you get for today’s price.
#46 of 77 currently priced Power supplies
- #43 CorsairCorsair RM1000x ATX 3.1 73
- #44 ThermaltakeThermaltake Toughpower GT Snow 1200W 73
- #45 CorsairCorsair CX650M ATX 3.1 71
- #46 ASRockASRock PRO-850B 70
- #47 be quiet!be quiet! Dark Power 14 850W 69
- #48 MSIMSI MAG A750GL PCIE5 II 69
- #49 MSIMSI MAG A1200PLS PCIE5 67
Performance Gaming PC
How much it can do. Price plays no part in this ranking.
#28 of 77 graded Power supplies
- #25 CorsairCorsair HX1000i 61
- #26 CorsairCorsair RM1000x ATX 2.53 61
- #27 be quiet!be quiet! DARK POWER 14 1000W 61
- #28 ASRockASRock PRO-850B 52
- #29 PhanteksPhanteks AMP GH 850W Black 52
- #30 be quiet!be quiet! Pure Power 12 850W 52
- #31 ThermaltakeThermaltake Toughpower GT 850W ATX 3.1 52
Value Gaming PC
How much of that you get for today’s price.
#44 of 77 currently priced Power supplies
- #41 CorsairCorsair CX750M ATX 3.1 76
- #42 ThermaltakeThermaltake Toughpower GT Snow 1200W 76
- #43 CorsairCorsair RM1000x ATX 3.1 75
- #44 ASRockASRock PRO-850B 74
- #45 CorsairCorsair CX650M ATX 3.1 73
- #46 MSIMSI MAG A750GL PCIE5 II 73
- #47 ASRockASRock Challenger CL-650G 70
Performance High-end GPU
How much it can do. Price plays no part in this ranking.
#28 of 77 graded Power supplies
- #25 CorsairCorsair HX1000i 61
- #26 CorsairCorsair RM1000x ATX 2.53 61
- #27 be quiet!be quiet! DARK POWER 14 1000W 61
- #28 ASRockASRock PRO-850B 52
- #29 PhanteksPhanteks AMP GH 850W Black 52
- #30 be quiet!be quiet! Pure Power 12 850W 52
- #31 ThermaltakeThermaltake Toughpower GT 850W ATX 3.1 52
Value High-end GPU
How much of that you get for today’s price.
#61 of 77 currently priced Power supplies
- #58 ThermaltakeThermaltake Toughpower GF A3 Gold 850W 51
- #59 CorsairCorsair CX650M ATX 3.1 51
- #60 RosewillRosewill VSB650 51
- #61 ASRockASRock PRO-850B 47
- #62 ASRockASRock PRO-650G 47
- #63 MSIMSI MAG A750BN PCIE5 III 46
- #64 MSIMSI MAG A650BN PCIE5 III 42
Performance Small form factor
How much it can do. Price plays no part in this ranking.
#28 of 77 graded Power supplies
- #25 CorsairCorsair HX1000i 61
- #26 CorsairCorsair RM1000x ATX 2.53 61
- #27 be quiet!be quiet! DARK POWER 14 1000W 61
- #28 ASRockASRock PRO-850B 52
- #29 PhanteksPhanteks AMP GH 850W Black 52
- #30 be quiet!be quiet! Pure Power 12 850W 52
- #31 ThermaltakeThermaltake Toughpower GT 850W ATX 3.1 52
Value Small form factor
How much of that you get for today’s price.
#60 of 77 currently priced Power supplies
- #57 ASRockASRock Challenger CL-650G 25
- #58 NZXTNZXT C1500 Platinum 25
- #59 ASUSASUS TUF Gaming 1000W Gold 24
- #60 ASRockASRock PRO-850B 23
- #61 CorsairCorsair HX1200i 23
- #62 MSIMSI MAG A750BN PCIE5 III 22
- #63 ThermaltakeThermaltake Smart BM3 Bronze 750W 21
Performance Workstation
How much it can do. Price plays no part in this ranking.
#62 of 77 graded Power supplies
- #59 ASRockASRock PRO-650G 67
- #60 ASRockASRock Challenger CL-650G 67
- #61 ThermaltakeThermaltake Toughpower GX2 600W 67
- #62 ASRockASRock PRO-850B 33
- #63 ThermaltakeThermaltake Smart BM3 Bronze 850W 33
- #64 CorsairCorsair CX750 33
- #65 MSIMSI MAG A750BN PCIE5 III 33
Value Workstation
How much of that you get for today’s price.
#69 of 77 currently priced Power supplies
- #66 MSIMSI MAG A650BN PCIE5 III 34
- #67 ThermaltakeThermaltake Smart BM3 Bronze 850W 34
- #68 ThermaltakeThermaltake Smart BM3 Bronze 750W 33
- #69 ASRockASRock PRO-850B 33
- #70 CorsairCorsair CX750 30
- #71 ASRockASRock PRO-650B 28
- #72 MSIMSI MAG A650BN 27
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability | Higher Value with current priorities |
|---|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value70 | — | — |
| Gaming PCScenario capability | GradeS Value74 | — | — |
| High-end GPUScenario capability | GradeB Value47 | — | — |
| Small form factorScenario capability | GradeF Value23 | — | — |
| Workstation & 24/7Scenario capability | GradeC Value33 | Higher capability ASRock PRO-650G B 48 +100% capability · -9% price | Higher Value with current priorities ASRock PRO-750G B 55 +100% capability · +0% price |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Compare these grades with the full tier list
Trade-offs
Works well if
- Gaming PC is your main prioritygraded S for Gaming PC on the same rubric as the tier list
- Strong-value threshold: ~$44$44 is where Relative Value reaches 80 with Balanced priorities, in the 2026-10-10–2026-10-17 offer frame
- Nothing in this budget scores better with Balanced prioritiesno graded product within the 10% budget envelope around $55 reaches a higher Relative Value with Balanced priorities
Consider other options if
- Current price sits $11 above the strong-value threshold (~$44)cheapest tracked $55 against a $44 calculated threshold with Balanced priorities
- Small form factor is what you actually need it forit grades only F there
Works well if
- Gaming PC is your main prioritygraded S for Gaming PC on the same rubric as the tier list
- Strong-value threshold: ~$48$48 is where Relative Value reaches 80 for Gaming PC, in the 2026-10-10–2026-10-17 offer frame
- Nothing in this budget scores better for Gaming PCno graded product within the 10% budget envelope around $55 reaches a higher Relative Value for Gaming PC
Consider other options if
- Current price sits $7 above the strong-value threshold (~$48)cheapest tracked $55 against a $48 calculated threshold for Gaming PC
- Small form factor is what you actually need it forit grades only F there
Works well if
- High-end GPU is your main prioritygraded B for High-end GPU on the same rubric as the tier list
- Nothing in this budget scores better for High-end GPUno graded product within the 10% budget envelope around $55 reaches a higher Relative Value for High-end GPU
Consider other options if
- You want strong value for High-end GPU specificallycompeting products deliver so much more for High-end GPU per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Small form factor is what you actually need it forit grades only F there
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Small form factor is not actually your main job — Gaming PC isit grades F for Small form factor, but S for Gaming PC
Consider other options if
- Small form factor is what you actually need it forit grades F there; ASRock PRO-750G grades F at $55
- You want strong value for Small form factor specificallycompeting products deliver so much more for Small form factor per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- You are buying for Small form factor and want no asterisksthe rubric caps this grade: atx unit: it does not fit an sfx case
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Workstation is not actually your main job — Gaming PC isit grades C for Workstation, but S for Gaming PC
Consider other options if
- Workstation is what you actually need it forit grades C there; ASRock PRO-650G grades B at $50
- You want strong value for Workstation specificallycompeting products deliver so much more for Workstation per dollar that no price this model realistically trades at reaches the strong-value mark for this job
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the ASRock PRO-850B
Chosen for Balanced
Chosen for Gaming PC
Chosen for High-end GPU
Chosen for Small form factor
Chosen for Workstation
Alternatives stay near this product’s price range. Step-up options may exceed the standard budget envelope when the capability gain is meaningful.
More head-to-head comparisons in this category
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications and compatibility
What this product is, and what to check before it goes into your build.
Power / Interface
- Rated output
- 850 W
- +12 V output
- 849.6 W
- 80 PLUS rating
- 80 PLUS Bronze
- ATX standard
- ATX 3.1
Show all specifications
Warranty
- Warranty
- 3 years
- Manufacturer part number
- PRO-850B
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-10-10–2026-10-17
What to check in your build
A case that takes ATX power supplies
The size is set by the case: ATX cases take ATX units, small cases take SFX (some also SFX-L).
140 mm of power-supply bay, plus room for the cables
Case makers list the longest power supply the bay takes; modular cables need extra space behind the unit.
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
ASRock PRO-850B offers a balanced view across an all-round mix of priorities. It ranks #28 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers S-grade capability for Gaming PC. It ranks #28 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers B-grade capability for High-end GPU. It ranks #28 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers F-grade capability for Small form factor. It ranks #28 by capability in the current modelled field. Its clearest measured strength is rated output 850. The F grade is the decisive limitation for this workload.
ASRock PRO-850B offers C-grade capability for Workstation. It ranks #62 by capability in the current modelled field. Its clearest measured strength is rated output 850. The C grade is the decisive limitation for this workload.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon is shown as a discovery link when we do not have a permitted verified price snapshot. It is excluded from price comparisons, rankings and Relative Value until a compliant tracked price exists.
Useful links & sources
offer frame 2026-10-10–2026-10-17 · formula psu-value-v1 · facts facts-2026-10-17 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.